Basic Cancer R Boolean algebra(Logic algebra) is a closure mathematical system that defines a series of logic operation (and, or, not) performed on set k of variables(a, b, c.) which can only have two values of o or o Notated as L=你k,+,°-0,1} Closure(封闭) A set is closed with respect to a operator if, the operation is applied to members of the set, the result is also a member of the setBasic Concept Boolean algebra (Logic algebra) is a closure mathematical system that defines a series of logic operation (and, or, not) performed on set k of variables (a, b, c …) which can only have two values of 0 or 1. Notated as L={k, +, •, -, 0, 1} Closure(封闭） A set is closed with respect to a operator if, the operation is applied to members of the set, the result is also a member of the set