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MMA 5.1 Integrals

• To: mathgroup at smc.vnet.net
• Subject: [mg52690] MMA 5.1 Integrals
• From: "Egbert Kankeleit" <e.kankeleit at t-online.de>
• Date: Thu, 9 Dec 2004 20:22:49 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

Someone with  elitist "insight" can understand  the philosophy
of costly updates? :

Example (win2000, 850 MHz):

i)     Timing[ FourierTransform[Exp[-(x + 1)^2] , x, X];]

ii)     Timing[ Integrate[Exp[-(x + 1)^2 + I *x *X],
        {x, -\[Infinity],\[Infinity]}];]

iii)     Timing[ LaplaceTransform[Exp[-(x + 1)^2], x, X];]

results respectively:
         MMA 4.2,                  MMA 5.0            MMA5.1

i)         1.4                    Infinity          117.       seconds
ii)        1.0                    45.                     1.9
iii)       0.15                    1.0                   1.0

WRI,  quo vadis?

kankel

• Follow-Ups:
  • Re: Mathematica 5.1 Integrals
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>