let E be set ; :: thesis: for A being Subset of (E ^omega)
for m, n being Nat st m <= n holds
(A ?) |^ (m,n) = (A ?) |^ (0,n)
let A be Subset of (E ^omega); :: 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 A1: m <= n ; :: thesis: (A ?) |^ (m,n) = (A ?) |^ (0,n)
<%> E in A ? by Th78;
hence (A ?) |^ (m,n) = (A ?) |^ (0,n) by A1, Th72; :: thesis: verum