[Maxima-bugs] [ maxima-Bugs-1668087 ] integrate(1/cosh(x/R)^4, x, -inf, inf) = 0

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Bugs item #1668087, was opened at 2007-02-24 17:42
Message generated for change (Comment added) made by rtoy
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Category: Lisp Core - Integration
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: integrate(1/cosh(x/R)^4,x,-inf,inf) = 0

Initial Comment:
This is done right:

integrate(1/cosh(x)^4,x,-inf,inf) = 4/3

This returns 0 (after asking for the sign of R):

integrate(1/cosh(x/R)^4,x,-inf,inf)


Regards,

Tommy Anderberg
Tom...@si...

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>Comment By: Raymond Toy (rtoy)
Date: 2007-02-26 11:18

Message:
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This is essentially the same as the bug [ 1309432 ]
integrate(1/cosh(a*x)^2,x,-inf,inf);

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https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1668087&group_id=4933