thus for n being Element of NAT holds multnat . 1,n = n :: according to BINOP_1:def 7,BINOP_1:def 16 :: thesis: 1 is_a_right_unity_wrt multnat

proof

let n be Element of NAT ; :: thesis: multnat . 1,n = n
thus multnat . 1,n = 1 * n by Def24
.= n ; :: thesis: verum

end;

let n be Element of NAT ; :: according to BINOP_1:def 17 :: thesis: multnat . n,1 = n
thus multnat . n,1 = n * 1 by Def24
.= n ; :: thesis: verum