set minus

The set difference A\B is defined by A\B = {x:x element A and x not element B}. Here, the backslash symbol is defined as Unicode U+2216. The set difference is therefore equivalent to the complement set, and is implemented in the Wolfram Language as Complement[A, B]. The symbol A - B is sometimes also used to denote a set difference .

backslash | complement set | difference set | symmetric difference