\xmapsto{abc}The \xmapsto{abc} command in LaTeX is used to create an extensible arrow with a label 'abc' above it. This is typically used in mathematical expressions to denote a mapping or transformation from one element to another, with the label providing additional context or information about the mapping.
Maps element x to element y with label 'abc'.
x \xmapsto{abc} yFunction f maps set X to set Y with label 'abc'.
f: X \xmapsto{abc} YSequential mapping from a to b to c with label 'abc'.
a \xmapsto{abc} b \xmapsto{abc} c