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Please notice that the following look different from each other. I changed the first to the second in this article:
- in mn-1 dimensional projective space.
- in (mn − 1)-dimensional projective space.
The second form is in accord with WP:MOSMATH and is legible. The first is not.
The differences are:
- A minus sign rather than a hyphen.
- Space before and after the minus sign.
- Parentheses.
- The hyphen between the parentheses and the succeeding word.
Michael Hardy (talk) 03:51, 25 May 2009 (UTC)