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MathGroup Archive 2002

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Yet another Version 4.2 Integration howler

  • To: mathgroup at smc.vnet.net
  • Subject: [mg35267] Yet another Version 4.2 Integration howler
  • From: Vladimir Bondarenko <vvb at mail.strace.net>
  • Date: Fri, 5 Jul 2002 02:20:55 -0400 (EDT)
  • Reply-to: Vladimir Bondarenko <vvb at mail.strace.net>
  • Sender: owner-wri-mathgroup at wolfram.com

..............................................................................

BUG # 3617

For an expression having a concrete numeric value,  Indeterminate is reported

BUG HISTORY:    PRESENT   4.2 for Microsoft Windows (February 28, 2002)
                ABSENT    4.1 for Microsoft Windows (November 2, 2000)
                ABSENT    4.0 for Microsoft Windows (April 21, 1999)
                ABSENT    Microsoft Windows 3.0 (April 25, 1997)
                ABSENT    Windows 387 2.2 (April 9, 1993)

Reproducible    Always
BuildNumber     156656
CPU ID          AuthenticAMD AMD Athlon(tm) XP 1600+ 
RAM size        512 Mb
Free HDD size   11  Gb
OS ID           Microsoft Windows 98 4.10.2222 A

The value of the integral is defined.
However, Mathematica reports  Indeterminate  which is invalid.

                Integrate[Log[z]/(1 + z^2), {z, 0, Infinity}]

ACTUAL:         Indeterminate

EXPECTED:       0

CHECK-UP:       NIntegrate[Log[z]/(1 + z^2), {z, 0, Infinity}] // Chop

                0

..............................................................................


Best,

Vladimir Bondarenko




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