Whenever I write ", " (with a space after the comma) in mathmode, I really want a space there. usually, this is either something like
the points, $a, b$, and $c$....
or in an explicit vector:
Let the vector $x=(x_1, x_2, x_3)$ be...
Since TeX removes this space, my text is often riddled with explicit short spaces:
Is there a way to tell TeX that this is not desirable or to hack TeX into submission?