let A be non empty set ; :: thesis: for v being Element of Valuations_in A
for J being interpretation of A holds (Valid (VERUM,J)) . v = TRUE
let v be Element of Valuations_in A; :: thesis: for J being interpretation of A holds (Valid (VERUM,J)) . v = TRUE
let J be interpretation of A; :: thesis: (Valid (VERUM,J)) . v = TRUE
((Valuations_in A) --> TRUE) . v = TRUE by FUNCOP_1:7;
hence (Valid (VERUM,J)) . v = TRUE by Lm1; :: thesis: verum