Digital Logic, Essential Prime Implicants
The number of essential prime implicants in the function f(a, b, c, d) = Σ(1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15) is ________.
The number of essential prime implicants in the function f(a, b, c, d) = Σ(1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15) is ________.