Message 61366 - Python tracker

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Author	gmcastil
Recipients	Rhamphoryncus, christian.heimes, gmcastil, gvanrossum, mark.dickinson, tim.peters
Date	2008-01-20.22:24:41
SpamBayes Score	0.079872385
Marked as misclassified	No
Message-id	<1200867882.81.0.239647793818.issue1640@psf.upfronthosting.co.za>
In-reply-to

Content
Just a quick addition here regarding the singularities to these functions. The atanh(x) is only defined for \|x\| < 1, so atanh(1) or atanh(-1) isn't singular there so much as simply isn't defined. So, even though the function approaches infinite as x -> 1, it wouldn't really be correct to return a value at \|x\| = 1. I think raising an exception at those points would be more correct.

Just a quick addition here regarding the singularities to these
functions.  The atanh(x) is only defined for |x| < 1, so atanh(1) or
atanh(-1) isn't singular there so much as simply isn't defined.  So,
even though the function approaches infinite as x -> 1, it wouldn't
really be correct to return a value at |x| = 1.  I think raising an
exception at those points would be more correct.

History
Date	User	Action	Args
2008-01-20 22:24:43	gmcastil	set	spambayes_score: 0.0798724 -> 0.079872385 recipients: + gmcastil, gvanrossum, tim.peters, mark.dickinson, Rhamphoryncus, christian.heimes
2008-01-20 22:24:42	gmcastil	set	spambayes_score: 0.0798724 -> 0.0798724 messageid: <1200867882.81.0.239647793818.issue1640@psf.upfronthosting.co.za>
2008-01-20 22:24:41	gmcastil	link	issue1640 messages
2008-01-20 22:24:41	gmcastil	create