Axiom ax-mulrcl 7388

Description: Closure law for multiplication in the real subfield of complex numbers. Axiom for real and complex numbers, justified by theorem axmulrcl 7348. Proofs should normally use remulcl 7414 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 7293	. . . 4 class RR
3	1, 2	wcel 1436	. . 3 wff A e. RR
4		cB	. . . 4 class B
5	4, 2	wcel 1436	. . 3 wff B e. RR
6	3, 5	wa 102	. 2 wff ( A e. RR /\ B e. RR )
7		cmul 7299	. . . 4 class x.
8	1, 4, 7	co 5613	. . 3 class ( A x. B )
9	8, 2	wcel 1436	. 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  7414