Minimum about fuzzy logic
Logical terms

For the “3-minority” functions, it holds m3 = f_2_3; for the “5-majority” function, it holds m5 = f_3_5. It generally holds that the minimized logical expression for the k threshold contains the sum of product members with the length of k, in which all combinations of the n variables in the fundamental condition (no negations) are covered in a sequence. Thus, it holds for example:

f_3_3(a, b, c) = abc

f_2_3(a, b, c) = m3 (a, b, c) = ab + ac + bc

f_1_3(a, b, c) = a + b + c

f_4_4(a, b, c, d) = abcd

f_3_4(a, b, c, d) = abc + abd + acd + bcd

f_2_4(a, b, c, d) = ab + ac + ad + bc + bd + cd

f_1_4(a, b, c, d) = a + b + c + d