11
votes
2answers
1k views

Is it safe to temporarily redefine \and, \or, and \not?

I'm writing lots of logic expressions in LaTeX and I'd much rather write $p \and \not q \or r$ than $p \land \lnot q \lor r$. I was thinking of doing something like this: \newenvironment{logic}{% ...
3
votes
1answer
9k views

Best way to typeset the identity operator, or unit? [duplicate]

Possible Duplicate: Blackboard bold characters I have seen the unit (or identity operator) typeset via \newcommand{\unit}{1\!\!1} Is this really the best way to get a double-stroke 1? ...
10
votes
3answers
2k views

Using ] and [ as math symbols, not delimiters

I'm writing some topology up, and I prefer to use the notation ]a,b[ to denote an open interval as opposed to (a,b), since the ( and ) symbols tend to be over used in this subject. Is there a ...
16
votes
4answers
1k views

Writing a negative number in text mode: $-$9 or $-9$?

If we want to produce -9, typing -9 in an input file is not correct because - is intentionally designed for hyphenation so its glyph is bad to represent the minus sign. To produce the minus sign, we ...
43
votes
2answers
54k views

Which dot character to use in which context?

Wikipedia lists several dot characters in Unicode. These are the ones that are ambiguous to me: interpunct, middle dot (·) · · U+00B7 "midpoint (in typography)" ...