#### math spaces

List of predefined spaces:

 Math Spaces Command Example Result \, (smallest predefined) $$a\,b$$ $a\,b$ \:  (second smallest predefined) $$a\:b$$ $a\:b$ \;  (third smallest predefined) $$a\;b$$ $a\;b$ \/  (avoiding ligatures) $$V\/A$$ instead of $$VA$$ $V\/A$ instead of $VA$ \quad  (space of current character set size) $$a\quad~b$$ $a\quad~b$ \qquad  (double space of current character set size) $$a\qquad~b$$ $a\qquad~b$ \_ (where _ is blank!) $$a\ b$$(whereas $$a\b$$ is not a valid filter expression since the blank space is missing; it is recommended to use the tilde ~ instead of the simple whitespace) $a\ b$ \hspace{n} ,where n positive integer (= n Pixels) $$a~\hspace{30}~b$$$$a~\hspace{15}~b$$$$a~\hspace{2}~b$$$$a~\hspace{1}~b$$ $a~\hspace{30}~b$$a~\hspace{15}~b$$a~\hspace{2}~b$$a~\hspace{1}~b$ \unitlength{m}\hspace{n}, changes the default unit length (m=1px) to be applied $$a~\hspace{2}~b\unitlength{10}~\hspace{2}~c$$(second space is 10x2=20px) $a~\hspace{2}~b\unitlength{10}~\hspace{2}~c$

Note: Simple blank spaces and tildes (~) are ignored by the TeX filter and don't produce any space. You must use one of the defined math spaces to get a visible (extra) space.