Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2001
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2001

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

Search the Archive

Re: slow integration

  • To: mathgroup at smc.vnet.net
  • Subject: [mg29949] Re: [mg29905] slow integration
  • From: Tomas Garza <tgarza01 at prodigy.net.mx>
  • Date: Thu, 19 Jul 2001 03:57:14 -0400 (EDT)
  • References: <200107180608.CAA18960@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

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
>
>



  • References:
  • Prev by Date: Re: is there a way to swap the axes in a Plot?
  • Next by Date: Re: Declaring variables
  • Previous by thread: slow integration
  • Next by thread: Re: slow integration