How to type "space" in Latex

[wam_mi]

Hi there,

Can I just ask how can I type "space" between two equations (for example) on the same line?

Thanks!

[rasmhop]

I normally use
\,
\quad
\qquad
Depending on the amount of space I need:
x\,y
x\quad y
x\qquad y
For some purposes such as aligning systems of equations there are better alternatives such as the environment align*.

EDIT:
I just remembered that
\:
\;
\ (just \ followed by a space).
also works as follows:
x\:y
x\; y
x\ y

I just looked up the relation between them and it turns out that
\, = 3/18 \quad
\: = 4/18 \quad
\; = 5/18 \quad
\ = corresponds to normal space.
\qquad = 2\quad
I'm not exactly a LaTeX expert so if someone spots an error feel free to correct me.