Reply
Page 1 of 309 1 2 3 11 51 101 ... LastLast
Results 1 to 30 of 9254
  1. #1
    Registered User Muckle_Ewe's Avatar
    Join Date: Dec 2009
    Age: 33
    Posts: 6,467
    Rep Power: 11662
    Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000)
    Muckle_Ewe is offline

    Math thread! Come in and have some pi...

    Instructions...


    Download this add-on for firefox.

    Latex Composer
    https://addons.mozilla.org/en-US/firefox/addon/4082/

    For the unaware, Latex is a universally used typesetting software for maths documents.



    Now look at the very bottom right of your browser.
    Should be a small round symbol thing like this ---> .
    Clicking this brings up the compiler.

    Now you can enter code that produces math output.



    Now posting the code here won't convert it into math output since this site doesn't have Latex installed but...
    If you just copy and paste the code here, others can again copy and paste it into the compiler to see your formulas and what not.




    So folks... Whats your maths experience? Area of interest etc!

    For me,

    Dynamical system, methods of integration, asymptotic methods and maths biology are my areas of interest. Just graduated 2 weeks ago. Feels good man... Going for a masters now as well.

    \Gamma(z) = \int_0^\infty t^{z-1} e^{-t}\,dt
    Reply With Quote

  2. #2
    Registered User moosecakes4all's Avatar
    Join Date: May 2009
    Posts: 7,996
    Rep Power: 8484
    moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000)
    moosecakes4all is offline
    Biological math? Sounds interesting mayne! Aware me.
    Just finished Calc 1 last semester with an A, going into calc 2 this fall. Really enjoyed it.
    I ALWAYS rep back, just leave a link to one of your posts in the rep comment.
    Reply With Quote

  3. #3
    Registered User Muckle_Ewe's Avatar
    Join Date: Dec 2009
    Age: 33
    Posts: 6,467
    Rep Power: 11662
    Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000)
    Muckle_Ewe is offline
    Originally Posted by moosecakes4all View Post
    Biological math? Sounds interesting mayne! Aware me.
    Just finished Calc 1 last semester with an A, going into calc 2 this fall. Really enjoyed it.
    Being from UK I'm not quite sure what Calc 1 and 2 are... Perhaps an example of what's in it?

    As for maths biology...

    It's basically a combination of dynamical systems and differentiation.

    I wouldn't have thought you would have covered dynamical systems yet but...

    From wiki

    The dynamical system concept is a mathematical formalization for any fixed "rule" which describes the time dependence of a point's position in its ambient space. Examples include the mathematical models that describe the swinging of a clock pendulum, the flow of water in a pipe, and the number of fish each spring in a lake.


    So basically how stuff changes as parameters change.

    Like populations. And you find limiting populations, where any more people/things introduced into the environment will cause them to die out due to resources etc.


    Stuff like that!
    Reply With Quote

  4. #4
    Registered User moosecakes4all's Avatar
    Join Date: May 2009
    Posts: 7,996
    Rep Power: 8484
    moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000) moosecakes4all is a name known to all. (+5000)
    moosecakes4all is offline
    Ahh, i see, i see. Totally different than what i thought it would be lol.
    Calc 1 and 2 are just basically single variable calculus.
    I ALWAYS rep back, just leave a link to one of your posts in the rep comment.
    Reply With Quote

  5. #5
    Registered User Muckle_Ewe's Avatar
    Join Date: Dec 2009
    Age: 33
    Posts: 6,467
    Rep Power: 11662
    Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000)
    Muckle_Ewe is offline
    Originally Posted by moosecakes4all View Post
    Ahh, i see, i see. Totally different than what i thought it would be lol.
    Calc 1 and 2 are just basically single variable calculus.
    Bump before I sleep...


    I need to start properly looking at multivariable calc. Solid at single var but never really gave multi a thought. Greens theorem and what not...

    Ah well...

    Gonna start looking at some n-body stuff when I get up tomorrow.
    Reply With Quote

  6. #6
    do it for the lulz Rolling's Avatar
    Join Date: Jan 2005
    Location: U.S.
    Posts: 4,950
    Rep Power: 5905
    Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000)
    Rolling is offline
    hello all. took calc 1 but never learned partial derivative needed in my advance econ class...


    lets say I want to take the partial derivative of 15y + Sqrt(x)

    with respect to X... would I get 7.5x^-1/2

    and then with respect to Y... 15y + ? ughhh confused
    Reply With Quote

  7. #7
    Registered User Muckle_Ewe's Avatar
    Join Date: Dec 2009
    Age: 33
    Posts: 6,467
    Rep Power: 11662
    Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000)
    Muckle_Ewe is offline
    Originally Posted by Rolling View Post
    hello all. took calc 1 but never learned partial derivative needed in my advance econ class...


    lets say I want to take the partial derivative of 15y + Sqrt(x)

    with respect to X... would I get 7.5x^-1/2

    and then with respect to Y... 15y + ? ughhh confused
    Treat the y as a constant when you partial diff with respect to x and vice versa.

    So for x it would be 1/2x^-1/2

    For y it would be 15.

    I literally just said I'm not great at multiple calc but I think that's right.
    Reply With Quote

  8. #8
    Registered User turkey_server's Avatar
    Join Date: Mar 2010
    Posts: 4,953
    Rep Power: 2730
    turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500)
    turkey_server is offline
    masters in pure math. working on my phd dissertation in geometric topology now.
    Reply With Quote

  9. #9
    Banned Spaghettii's Avatar
    Join Date: May 2009
    Posts: 6,961
    Rep Power: 0
    Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500) Spaghettii is not very helpful. (-500)
    Spaghettii is offline
    hmm i like where this is going
    Reply With Quote

  10. #10
    אz - Giga Dorrill Breakah Alephz's Avatar
    Join Date: Aug 2009
    Location: United Kingdom (Great Britain)
    Age: 30
    Posts: 1,152
    Rep Power: 798
    Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500)
    Alephz is offline
    Originally Posted by Rolling View Post
    hello all. took calc 1 but never learned partial derivative needed in my advance econ class...


    lets say I want to take the partial derivative of 15y + Sqrt(x)

    with respect to X... would I get 7.5x^-1/2

    and then with respect to Y... 15y + ? ughhh confused
    The fundamental idea of partial derivatives is any function which isn't being partially derived is treated as a constant.

    eg, supposed a function such as

    f(x) + f(¬x) --- (¬x == not x).

    the partial derivative treats f(¬x) as a constant, so, the partial derivative of the function becomes

    f'(x)

    remember the derivative of any constant is 0.

    So going back to your question, observe that your function has two parts

    15y = f(y)
    sqrt(x) = x^1/2 = f(x)

    so the partial derivative d/dx of 15y + sqrt(x) = d/dx f(y) + f(x) = f'(x) = 1/2 x ^(-1/2)
    If you do what you've always done, you'll get what you always got
    Reply With Quote

  11. #11
    do it for the lulz Rolling's Avatar
    Join Date: Jan 2005
    Location: U.S.
    Posts: 4,950
    Rep Power: 5905
    Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000)
    Rolling is offline
    Okay it's all making sense now... thanks everyone
    Reply With Quote

  12. #12
    Registered User Muckle_Ewe's Avatar
    Join Date: Dec 2009
    Age: 33
    Posts: 6,467
    Rep Power: 11662
    Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000)
    Muckle_Ewe is offline
    Originally Posted by turkey_server View Post
    masters in pure math. working on my phd dissertation in geometric topology now.
    Christ I hate topology, and pretty much all pure math to be honest, except number theory. What exactly is your diss on? Is geo top the title of it or is a specific part of that?
    Reply With Quote

  13. #13
    do it for the lulz Rolling's Avatar
    Join Date: Jan 2005
    Location: U.S.
    Posts: 4,950
    Rep Power: 5905
    Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000) Rolling is a name known to all. (+5000)
    Rolling is offline
    Could someone show me, step by step, taking the partial derivative of the Cobb-Douglass function? Need to learn it for econ..

    Y = AK^a L^1-a

    a = alpha.

    With respect to K, and then respect to L.

    I know what the derived functions should look like, but can't figure out the steps. How do you take a partial derivative when there is not an actual number involved, like alpha, above?
    Reply With Quote

  14. #14
    lulz wingman11's Avatar
    Join Date: Jan 2009
    Age: 31
    Posts: 9,252
    Rep Power: 8409
    wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000) wingman11 is a name known to all. (+5000)
    wingman11 is offline
    Originally Posted by Muckle_Ewe View Post
    Being from UK I'm not quite sure what Calc 1 and 2 are... Perhaps an example of what's in it?

    As for maths biology...

    It's basically a combination of dynamical systems and differentiation.

    I wouldn't have thought you would have covered dynamical systems yet but...

    From wiki

    The dynamical system concept is a mathematical formalization for any fixed "rule" which describes the time dependence of a point's position in its ambient space. Examples include the mathematical models that describe the swinging of a clock pendulum, the flow of water in a pipe, and the number of fish each spring in a lake.


    So basically how stuff changes as parameters change.

    Like populations. And you find limiting populations, where any more people/things introduced into the environment will cause them to die out due to resources etc.


    Stuff like that!
    calc 1 is differential, calc 2 is integral
    http://28.media.tumblr.com/tumblr_l2ecit9wge1qanb21o1_400.gif
    http:/https://forum.bodybuilding.com/images.freshnessmag.com/wp-content/uploads/2010/04/pyrenex-fall-2010-collection-2.jpg
    http://www.threadbombing.com/data/media/2/fish_mouth.gif

    math help: https://igoodies.000webhostapp.com/?viagra=showthread.php?t=124441141

    usually 2k+
    Reply With Quote

  15. #15
    Registered User turkey_server's Avatar
    Join Date: Mar 2010
    Posts: 4,953
    Rep Power: 2730
    turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500) turkey_server is a glorious beacon of knowledge. (+2500)
    turkey_server is offline
    Originally Posted by Muckle_Ewe View Post
    Christ I hate topology, and pretty much all pure math to be honest, except number theory. What exactly is your diss on? Is geo top the title of it or is a specific part of that?
    geometric topology is a pretty big field. i'm still 2 years away, so right now i just read a lot of literature (there's no textbooks at this point... just papers) to try and learn the material. focusing primarily on coxeter systems, mostly just because that's what my major advisor is interested in, lol.
    Reply With Quote

  16. #16
    Registered User Muckle_Ewe's Avatar
    Join Date: Dec 2009
    Age: 33
    Posts: 6,467
    Rep Power: 11662
    Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000)
    Muckle_Ewe is offline
    Originally Posted by Rolling View Post
    Could someone show me, step by step, taking the partial derivative of the Cobb-Douglass function? Need to learn it for econ..

    Y = AK^a L^1-a

    a = alpha.

    With respect to K, and then respect to L.

    I know what the derived functions should look like, but can't figure out the steps. How do you take a partial derivative when there is not an actual number involved, like alpha, above?
    When differentiating with respect to K here (for example), treat everything else as a constant.

    So just remember the rules...

    If f(x) = x^k

    Then f'(x) = kx^(k-1) (see here http://en.wikipedia.org/wiki/Derivat...tary_functions)

    In the K case, it would be.

    Y = AK^a L^1-a

    Derivative with respect to K is...

    AaK^(a-1)L^(1-a)

    (To view a better version paste the below code into the add-on compiler from the first post)

    A \alpha K^{\alpha-1} L^{1-\alpha}
    Reply With Quote

  17. #17
    אz - Giga Dorrill Breakah Alephz's Avatar
    Join Date: Aug 2009
    Location: United Kingdom (Great Britain)
    Age: 30
    Posts: 1,152
    Rep Power: 798
    Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500) Alephz is a jewel in the rough. (+500)
    Alephz is offline
    free bump
    If you do what you've always done, you'll get what you always got
    Reply With Quote

  18. #18
    Registered User leafs43's Avatar
    Join Date: Apr 2007
    Age: 38
    Posts: 35,762
    Rep Power: 39912
    leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000)
    leafs43 is offline
    The farthest I ever got was the 2nd semester of differential equations.

    Both I thought were pretty easy compared to the hell that is Calc II.

    Calc II largely is dependent on the teacher teaching it. My first time attempting Calc II we had a new teacher to the university from Harvard and he wrote the text book. This guy had crazy ridiculous standards. He didn't even give partial credit on tests. It was either all right or all wrong. I am so glad I dropped that class and made it up over the summer.
    Reply With Quote

  19. #19
    Registered User st_jimmy's Avatar
    Join Date: Jul 2006
    Posts: 2,106
    Rep Power: 649
    st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250)
    st_jimmy is offline
    Anyone understand how fractional derivatives work? I heard this was possible, but I'm unable to visualize or wrap my mind around it at all
    Reply With Quote

  20. #20
    Registered User leafs43's Avatar
    Join Date: Apr 2007
    Age: 38
    Posts: 35,762
    Rep Power: 39912
    leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000) leafs43 has much to be proud of. One of the best! (+20000)
    leafs43 is offline
    Originally Posted by st_jimmy View Post
    Anyone understand how fractional derivatives work? I heard this was possible, but I'm unable to visualize or wrap my mind around it at all
    Isn't that just differential equations?

    Prolly not stuff like dy/dx but very similar. Maybe more proof based?

    edit: I googled it, it's pretty much the same as differential equations.
    Reply With Quote

  21. #21
    Registered User st_jimmy's Avatar
    Join Date: Jul 2006
    Posts: 2,106
    Rep Power: 649
    st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250) st_jimmy has a spectacular aura about. (+250)
    st_jimmy is offline
    Originally Posted by leafs43 View Post
    Isn't that just differential equations?

    Prolly not stuff like dy/dx but very similar. Maybe more proof based?

    edit: I googled it, it's pretty much the same as differential equations.
    You can make fractional differential equations I guess, but as far as I know fractional calculus isn't covered in a regular differential equations class. I'm taking diffy q's in the fall so I guess I will find out then
    Reply With Quote

  22. #22
    Registered User Akar's Avatar
    Join Date: Jan 2007
    Age: 30
    Posts: 217
    Rep Power: 185
    Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10) Akar is on a distinguished road. (+10)
    Akar is offline
    Originally Posted by st_jimmy View Post
    Anyone understand how fractional derivatives work? I heard this was possible, but I'm unable to visualize or wrap my mind around it at all
    They won;t cover it... actually I am not even sure they cover it in any undergrad course.

    How they work is:

    Suppose you want to take the derivative of a function f, call it Df.
    Then D is an *operator* that maps a function f to another function Df.
    We write this as f --> Df, kinda.
    If you want to find a 1/2 derivative, then the idea is to find an operator H such that
    H^2= H H = D. Then applying H to f to get f --> Hf we would say that Hf is the half derivative of f.


    actually just wiki it, they have latex and explains it pretty well
    Reply With Quote

  23. #23
    The Social Miscer Lookitskeith's Avatar
    Join Date: Apr 2009
    Location: United States
    Posts: 5,165
    Rep Power: 23419
    Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000) Lookitskeith has much to be proud of. One of the best! (+20000)
    Lookitskeith is offline
    subbed on this bish! Will be using this for Finance next semester, and then for grad school! If anyone needs help writing papers that's my specialty!
    I am here to share lulz, stories, pics, support, advice, help, and brotherhood. If you ever need anything shoot me a PM.
    Reply With Quote

  24. #24
    What u lookin at Willis? lyrics312's Avatar
    Join Date: Sep 2008
    Posts: 2,043
    Rep Power: 2727
    lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500) lyrics312 is a glorious beacon of knowledge. (+2500)
    lyrics312 is offline


    way over my head
    Hector Blunts

    Join Date November 18th 2008 3:17PM EST
    Ban Date: November 18th 2008 3:20PM EST

    You will be missed Mr. Blunts
    Reply With Quote

  25. #25
    Registered User Muckle_Ewe's Avatar
    Join Date: Dec 2009
    Age: 33
    Posts: 6,467
    Rep Power: 11662
    Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000)
    Muckle_Ewe is offline
    Any of you maths folk ever done any sort of orbital dynamics?

    I'll be doing a lot of that next year, what kind of maths should I be looking into?

    Thinking...

    Differential equations, dynamical systems, finite methods to solve ODEs?
    Reply With Quote

  26. #26
    Jags Are Bake charity4thepoor's Avatar
    Join Date: Sep 2007
    Location: Tallahassee, Florida, United States
    Posts: 25,767
    Rep Power: 25854
    charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000)
    charity4thepoor is offline
    Originally Posted by turkey_server View Post
    masters in pure math. working on my phd dissertation in geometric topology now.
    mirin

    i have taken thru calc 3 , ODE, linear, and number theory. doing vector analysis, PDEs and foundations of math in the fall. pretty excited bout it. so interesting
    **** Football Crew
    TB Lightning
    Reply With Quote

  27. #27
    Radical Atheist 9987's Avatar
    Join Date: Apr 2009
    Posts: 1,430
    Rep Power: 298
    9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50) 9987 will become famous soon enough. (+50)
    9987 is offline
    Latex has to be supported by the forum to actually use it.
    Reply With Quote

  28. #28
    Registered User Muckle_Ewe's Avatar
    Join Date: Dec 2009
    Age: 33
    Posts: 6,467
    Rep Power: 11662
    Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000) Muckle_Ewe is a splendid one to behold. (+10000)
    Muckle_Ewe is offline
    Originally Posted by charity4thepoor View Post
    mirin

    i have taken thru calc 3 , ODE, linear, and number theory. doing vector analysis, PDEs and foundations of math in the fall. pretty excited bout it. so interesting
    Ah cool. How's number theory going? I found it mind boggling but ended up doing pretty well in it. What's in foundations of maths, epsilon-delta proofs?

    Originally Posted by 9987 View Post
    Latex has to be supported by the forum to actually use it.
    Yeah, but! Read my OP again. It's a add on that lets you preview latex within firefox. Download the add on, type up some math in it, then paste the code for it here. Others can then copy and paste the code into the add on to see your formulas.
    Reply With Quote

  29. #29
    Jags Are Bake charity4thepoor's Avatar
    Join Date: Sep 2007
    Location: Tallahassee, Florida, United States
    Posts: 25,767
    Rep Power: 25854
    charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000) charity4thepoor has much to be proud of. One of the best! (+20000)
    charity4thepoor is offline
    Originally Posted by Muckle_Ewe View Post
    Ah cool. How's number theory going? I found it mind boggling but ended up doing pretty well in it. What's in foundations of maths, epsilon-delta proofs?
    foundations of math is essentially learning different techniques of proofs and when to use which ones. number theory was good man finished with an A-. was harder for me at the beginning because i have never had a proof-based class before that, but i got it down by the end.
    **** Football Crew
    TB Lightning
    Reply With Quote

  30. #30
    Registered User gatovolador's Avatar
    Join Date: May 2010
    Age: 38
    Posts: 6,682
    Rep Power: 2638
    gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500) gatovolador is a glorious beacon of knowledge. (+2500)
    gatovolador is offline
    Math undergrad, focused a lot on stochastic models and computer engineering. Wrote compilers for a few years and am now getting a masters doing computational linguistics (more probabilistic models).
    Reply With Quote

Similar Threads

  1. the "drpurples' come-in-and-have-a-chat thread"
    By drpurple in forum MMA Fighting
    Replies: 20
    Last Post: 10-13-2008, 02:24 PM
  2. Today is my birfday (come in and have some cake)
    By MikeThePickle in forum Misc.
    Replies: 24
    Last Post: 07-10-2008, 08:17 PM
  3. Replies: 24
    Last Post: 02-28-2004, 09:21 PM
  4. First time cutting, and have some quesitons.
    By K.C. Sparrow in forum Workout Programs
    Replies: 5
    Last Post: 06-15-2003, 09:40 PM
  5. First time cutting and have some questions.
    By K.C. Sparrow in forum Nutrition
    Replies: 2
    Last Post: 06-15-2003, 06:02 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
www.000webhost.com