The law appearing in the definition of Boolean algebras and lattice which states that
for binary operators 
and 
(which most commonly are logical OR and logical AND).
The two parts of the absorption law are sometimes called the "absorption identities"
(Grätzer 1971, p. 5).
See also
Explore with Wolfram|Alpha
References
Birkhoff, G. and Mac Lane, S. A Survey of Modern Algebra, 5th ed. New York: Macmillian, p. 317, 1996.Grätzer, G. Lattice Theory: First Concepts and Distributive Lattices. San Francisco, CA: W. H. Freeman, 1971.
Referenced on Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Absorption Law." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/AbsorptionLaw.html