# punctuation after a fraction in math mode

I use to punctuate my equations.

In math mode, when the last "word" is a fraction, I raise the final point using \cdot like in

x = \frac{3}{2} \cdot


so that the "." is at the same height as the fraction bar. So my questions are:

• Is it good practice?
• Is there an equivalent of \cdot for the comma?
• Is it good practice? No, in my opinion. – egreg Jan 29 '13 at 12:50

I agree with @egreg, the punctuation is part of the sentence structure and so should use the text fonts, if you can't avoid needing sentence punctuation in the display use something like \quad\text{.} (or \quad\text{,}).
• Are the \quads really necessary? I usually put them with no space or, if it looks bad, with some \; or \: sometimes. – Manuel Jan 29 '13 at 12:56