The set difference is defined by
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 is sometimes also used to denote a set difference (Smith et al. 1997, p. 68).
See alsoBackslash,
Complement Set,
Difference Set,
Symmetric Difference Explore with Wolfram|Alpha ReferencesCroft, H. T.; Falconer, K. J.; and Guy, R. K. Unsolved Problems in Geometry. New York: Springer-Verlag, p. 2, 1991.Harris, J. W. and Stocker, H. Handbook of Mathematics and Computational Science. New York: Springer-Verlag, p. 3, 1998.Smith, D.; Eggen, M.; and St. Andre, R. A Transition to Advanced Mathematics, 4th ed. New York: Brooks/Cole, 1997. Referenced on Wolfram|AlphaSet Difference Cite this as:Weisstein, Eric W. "Set Difference." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/SetDifference.html
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