let E be set ; :: thesis: for A being Subset of
for m, n being Nat st m <= n holds
(A ? ) |^ m,n = A |^ 0 ,n
let A be Subset of ; :: thesis: for m, n being Nat st m <= n holds
(A ? ) |^ m,n = A |^ 0 ,n
let m, n be Nat; :: thesis: ( m <= n implies (A ? ) |^ m,n = A |^ 0 ,n )
assume m <= n ; :: thesis: (A ? ) |^ m,n = A |^ 0 ,n
hence (A ? ) |^ m,n = (A ? ) |^ 0 ,n by Th96
.= A |^ 0 ,n by Th97 ;
:: thesis: verum