Results 1 to 3 of 3

Math Help - wxmaxima

  1. #1
    Newbie
    Joined
    Mar 2010
    Posts
    2

    Question wxmaxima

    Hi I'm using wxmaxima to evaluate

    U(y,z):=(p*c^2)/(2*mu)*(1-(2/c)^2+4*sum((-1)^k/(alpha*k^3)*(cosh((alpha*y)/c)/cosh((alpha*b)/c)*cosh((alpha*z)/c)),k,1,inf))

    alpha = (2*k-1)*(pi/2)
    at y = 0.08333335
    and z = 0.00001

    the program won't evaluate the sum all it will do is give the equation back with the summation sign.

    I want the answer for U(0.08333335, 0.00001).

    Any help would be appreciated
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by Eoin1 View Post
    Hi I'm using wxmaxima to evaluate

    U(y,z):=(p*c^2)/(2*mu)*(1-(2/c)^2+4*sum((-1)^k/(alpha*k^3)*(cosh((alpha*y)/c)/cosh((alpha*b)/c)*cosh((alpha*z)/c)),k,1,inf))

    alpha = (2*k-1)*(pi/2)
    at y = 0.08333335
    and z = 0.00001

    the program won't evaluate the sum all it will do is give the equation back with the summation sign.

    I want the answer for U(0.08333335, 0.00001).

    Any help would be appreciated
    I'm afraid you are a bit optimistics to expect anything else. If p , mu, b and c had numerical values you could get a numerical output but that is about the most you could expect (p and mu are not really an issue as they come outside the reall calculation).

    CB
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Mar 2010
    Posts
    2

    P, mu, b and c

    I have values for p, mu b and c. They area -30000, 0.002, 0.083333335 and 0.00004.

    I've tried using the float, numer, simpsum to get a numeric value at U(0.08333335, 0.00001) but have had no luck.

    Regards
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. parametric plot in wxMaxima (or Mathematica)
    Posted in the Math Software Forum
    Replies: 3
    Last Post: November 17th 2010, 08:04 PM
  2. Is wxMaxima being lazy?
    Posted in the Math Software Forum
    Replies: 2
    Last Post: July 27th 2010, 02:26 PM

Search Tags


/mathhelpforum @mathhelpforum