Axiom ax-mulrcl 7852

Description: Closure law for multiplication in the real subfield of complex numbers. Axiom for real and complex numbers, justified by Theorem axmulrcl 7808. Proofs should normally use remulcl 7881 instead. (New usage is discouraged.) (Contributed by NM, 22-Nov-1994.)

Assertion

Ref	Expression
ax-mulrcl	|- ( ( A e. RR /\ B e. RR ) -> ( A x. B ) e. RR )

Detailed syntax breakdown of Axiom ax-mulrcl

Step	Hyp	Ref	Expression
1		cA	. . . 4 class A
2		cr 7752	. . . 4 class RR
3	1, 2	wcel 2136	. . 3 wff A e. RR
4		cB	. . . 4 class B
5	4, 2	wcel 2136	. . 3 wff B e. RR
6	3, 5	wa 103	. 2 wff ( A e. RR /\ B e. RR )
7		cmul 7758	. . . 4 class x.
8	1, 4, 7	co 5842	. . 3 class ( A x. B )
9	8, 2	wcel 2136	. 2 wff ( A x. B ) e. RR
10	6, 9	wi 4	1 wff ( ( A e. RR /\ B e. RR ) -> ( A x. B ) e. RR )

This axiom is referenced by:  remulcl  7881