Blake canonical form

ABD + ABC + ABD + ABC
ACD + BCD + ACD + BCD
Boolean function with two different minimal forms. The Blake canonical form is the sum of the two.

In Boolean logic, a formula for a Boolean function f is in Blake canonical form (BCF), also called the complete sum of prime implicants, the complete sum, or the disjunctive prime form, when it is a disjunction of all the prime implicants of f.