let Y be non empty set ; :: thesis: for a being Element of Funcs Y,BOOLEAN
for G being Subset of (PARTITIONS Y)
for A, B being a_partition of Y holds All (All a,A,G),B,G '<' Ex (Ex a,A,G),B,G
let a be Element of Funcs Y,BOOLEAN ; :: thesis: for G being Subset of (PARTITIONS Y)
for A, B being a_partition of Y holds All (All a,A,G),B,G '<' Ex (Ex a,A,G),B,G
let G be Subset of (PARTITIONS Y); :: thesis: for A, B being a_partition of Y holds All (All a,A,G),B,G '<' Ex (Ex a,A,G),B,G
let A, B be a_partition of Y; :: thesis: All (All a,A,G),B,G '<' Ex (Ex a,A,G),B,G
All a,A,G '<' Ex a,A,G by Th8;
hence All (All a,A,G),B,G '<' Ex (Ex a,A,G),B,G by Th8; :: thesis: verum