How Can I Type Space Between Two Equations in Latex?

[wam_mi]

How to type "space" in Latex

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.