# Large negative spaces

I know about \! which creates a thin negative space but is there any native command for large negative spaces (like quad or qquad for positive spaces) ?

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In text mode: \kern-1em equals "minus quad"

In math mode: \mkern-18mu equals "minus quad"

For "minus qquad" use -2em or -36mu respectively.

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For LaTeX, horizontal spacing is achieved using \hspace{<len>} where <len> is a length (either positive or negative); TeX's equivalent to \hskip. Since \quad [\qquad] is equivalent to a horizontal skip of 1em [2em], use \hspace{-1em} [\hspace{-2em}] to obtain a negative space amount.
\kern inserts a space depending on the mode that TeX is in, and could therefore be either vertical or horizontal.
Text-based spacing can be inserted using any of the \phantom-related commands: \phantom{<stuff>}, or \hphantom{<stuff>}, for example.