Talk:Structural rule

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	Logic

[edit] resolution

I have updated the resolution link to Resolution (logic). feel free to change it if you know a better place to redirect the link to. STHayden ^{[ Talk ]} 04:15, 21 August 2006 (UTC)

[edit] Simple-language section needed

This article, like many mathematics articles, is written in a language that is entirely inaccessible to non-mathematicians. The subject matter, however, appears simple and could be made clear to the novice through simple, concrete examples of each rule. The article badly needs a general-audience section in simple language, placed before the formal-logic formulation. -- 169.230.94.21 17:53, 4 January 2007 (UTC)

[edit] mistake in weakening?

I'm pretty sure (but pretty tired, so i didn't just change the article) that the second version of weakening should not be

$\frac{\Gamma \vdash \Sigma}{\Gamma \vdash A, \Sigma}$

but

$\frac{\Gamma \vdash A, \Sigma}{\Gamma \vdash \Sigma}$

80.109.45.190 (talk) 22:47, 14 April 2008 (UTC)

~~I agree (and I'm not tired at the moment), so I fixed it.~~ Pi zero (talk) 15:18, 25 May 2008 (UTC)

... and then I unfixed it. The right side of a sequent should be understood as a disjunction, so $\Gamma \vdash A, \Sigma$ is weaker than $\Gamma \vdash \Sigma$ . Pi zero (talk) 15:31, 25 May 2008 (UTC)