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Re: slow integration


You will not get any result. I guess the problem is that Erf[z] doesn't have
a closed form and it remains expressed as a definite integral.

Tomas Garza
Mexico City


----- Original Message -----
From: "Joshua A. Solomon" <J.A.Solomon at city.ac.uk>
To: mathgroup at smc.vnet.net
Subject: [mg29949] [mg29905] slow integration


> In[1]:=
> $Version
> Out[1]=
> 4.1 for Power Macintosh (November 2, 2000)
>
> Does anyone out there understand why, after two hours, the following still
> hasn't produced any output?
>
> In[2]:=
> Integrate[E^(-100000 (.03-x)^2)Erf[400 (z/x-.002)],{x,0,.03}]
>
> js
> --
> Joshua A. Solomon
> Department of Optometry and Visual Science
> City University
> London EC1V 0HB
> Voice: (44) 20 7040 0192
> Secretary/Fax: (44) 20 7040 0182
> J.A.Solomon at city.ac.uk
> http://www.staff.city.ac.uk/~solomon
>
>



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