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Slow simplify[], integrate[] in 5.2 for Mac

• To: mathgroup at smc.vnet.net
• Subject: [mg61731] Slow simplify[], integrate[] in 5.2 for Mac
• From: Eran Mukamel <emukamel at stanford.edu>
• Date: Thu, 27 Oct 2005 05:02:17 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Hi All,

I wonder if someone can give some insight into why some simple
calculations are dramatically slower (or don't even simplify) in
Mathematica 5.2 which run perfectly well in 4.2. I'm using a G5 Mac OSX
10.4.  In particular I find the following (artificial) integral:

Timing[Integrate[(a+c-sdfd+34e)Exp[(a+4c-d+34e) x^2+(b-54c+4h) x+c],{
        x,-Infinity,Infinity},Assumptions\[Rule](a+4c-d+34e)<0]]

runs in 0.16 sec using 4.2, but >5 sec using 5.2.

Thanks in advance!

Eran Mukamel

Stanford Physics
emukamel at stanford.edu

• Follow-Ups:
  • Re: Slow simplify[], integrate[] in 5.2 for Mac
    • From: Chris Chiasson <chris.chiasson@gmail.com>