As a reader, I never really understood why is it so common for textbooks to have the numbering à la Lemma 9.6. To me it seems to imply that we also have Lemma 9.5 and Lemma 9.7 but sure enough, 9.5 is a definition and 9.7 is an example. So when I started writing my first big assignment, one the first things I googled was how to \swapnumbers.

But unlike the creators of TeX packages and most users of the TeX.SE, I know little to nothing about typesetting. So I assume that the default option wasn't chosen randomly and would be happy to know the reason and maybe become convinced that Lemma 9.6 is the way to go.

Update: just to clarify, I meant why

Definition 9.5

Lemma 9.6

Example 9.7

as opposed to

9.5 Definition

9.6 Lemma

9.7 Example

So I'm not questioning the unified numbering (which it a good thing beyond any doubt).

closed as off-topic by Werner, user31729, Paul Gessler, egreg, Adam Liter Jul 29 '14 at 21:04

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question does not fall within the scope of TeX, LaTeX or related typesetting systems as defined in the help center." – Werner, Community, Paul Gessler, egreg, Adam Liter
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  • For that you can use ntheorem. – Bernard Jul 29 '14 at 19:19
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    Because if you refer to it, it's weird to say As we derived in 9.6 Lemma. And if you are searching for a lemma 9.6, it's a royal pain in the ass, if every kind is numbered on its own. Then definition 9.9 comes after lemma 9.3 and you have to check every page to catch it. But I share your bitterness, I think this stuff is archaic and we need to get a better way of it. I am not quite sure what. – percusse Jul 29 '14 at 19:19
  • It mostly depends on what you are thinking to be numbering: if you're numbering paragraphs (à la française), then the number goes first; if you're numbering the statements, then the number goes second. – egreg Jul 29 '14 at 19:21
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    I guess 'off topic', but in English 'Lemma 9.6' makes sense whereas '9.6 Lemma' doesn't as a 'name'. Note that it's the same for something where the numbers do run through: 'Section 1', 'Section 2', etc. and not '1 Section'. – Joseph Wright Jul 29 '14 at 19:44
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    @percusse: cleveref could handle this case intelligently, I think. – Bernard Jul 29 '14 at 21:54

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