MathGroup Archive 1993

[Date Index] [Thread Index] [Author Index]

Search the Archive

Series is taking too long


There must be something wrong with Series.
It took about 3 seconds to evaluate the first example
below but it never evaluated the second example (I killed
it after 10 minutes). I duplicated the problem many times.
I was the only one using the machine (no background jobs either).

ulam% math
Mathematica 2.1 for DEC RISC
Copyright 1988-92 Wolfram Research, Inc.
 -- Terminal graphics initialized -- 

In[1]:= Series[D[(Pi^(1/2)*(-z^2)^(1/2)*Erf[(-z^2)^(1/2)])/(E^z^2*z),z],{z,0,7}]
Series[D[(Pi^(1/2)*(-z^2)^(1/2)*Erf[(-z^2)^(1/2)])/(E^z^2*z),z],{z,0,7}]

                       4       6
                2   8 z    16 z        8
Out[1]= -2 + 4 z  - ---- + ----- + O[z]
                     3      15

In[2]:= Series[D[(Pi^(1/2)*(-z^2)^(1/2)*Erf[(-z^2)^(1/2)])/(E^z^2*z),z],{z,0,9}]
Series[D[(Pi^(1/2)*(-z^2)^(1/2)*Erf[(-z^2)^(1/2)])/(E^z^2*z),z],{z,0,9}]


Thanks for any help.

   Roque
   oliveria at engin.umich.edu





  • Prev by Date: Re: intelligent Integrate
  • Next by Date: color gradients
  • Previous by thread: Re: Exporting Mathematica output to word processing program
  • Next by thread: Re: Series is taking too long