theorem Th82:
for R being Ring holds Char R = 0 iff canHom_Int R is monomorphism
proof
let R be Ring; set f = canHom_Int R;
canHom_Int R is monomorphism iff ker f = {0.INT.Ring} by RING_2:12; then
canHom_Int R is monomorphism iff ker f = {0.INT.Ring}-Ideal by IDEAL_1:47;
hence thesis by Th81;
end;
