let L be 1_Lattice; :: thesis: Top L is_a_unity_wrt the L_meet of L

now

let u be Element of L; :: thesis: the L_meet of L . (Top L),u = u
thus the L_meet of L . (Top L),u = (Top L) "/\" u
.= u by LATTICES:43 ; :: thesis: verum

end;

hence Top L is_a_unity_wrt the L_meet of L by BINOP_1:12; :: thesis: verum