bug in Integrate
- To: mathgroup at smc.vnet.net
- Subject: [mg78114] bug in Integrate
- From: Veit Elser <ve10 at cornell.edu>
- Date: Sat, 23 Jun 2007 07:08:42 -0400 (EDT)
In version 6.0, the Integrate function applied to
Integrate[x Exp[-x] Log[x z], {x, 0, Infinity}, Assumptions -> z > 0]
evaluates to 0. Version 5.2 gives the correct result,
1 - EulerGamma + Log[z]. Interestingly, back in version 6.0
Integrate[x Exp[-x] Log[x z], {x, 0, Infinity}, Assumptions -> z == 1]
does evaluate correctly to
1 - EulerGamma
Let's hope this is fixed before the end of Euler's tercentennial.
Veit Elser