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From: Simon Wright <simon@pushface.org>
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Subject: Re: Arctan: to use with single or with double arguments?
Date: Sat, 11 Feb 2012 15:29:57 +0000
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Date: 2012-02-11T15:29:57+00:00
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AdaMagica <christ-usch.grein@t-online.de> writes:

> It's a severe bug to use positional association for Arctan!

Only a bug if you get it wrong. Otherwise it's a meta-bug.

Not sure that Arctan (Y => X, X => Y) is exactly _clear_.