Axiom ax-mulrcl 7971

Description: Closure law for multiplication in the real subfield of complex numbers. Axiom for real and complex numbers, justified by Theorem axmulrcl 7927. Proofs should normally use remulcl 8000 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 7871	. . . 4 class RR
3	1, 2	wcel 2164	. . 3 wff A e. RR
4		cB	. . . 4 class B
5	4, 2	wcel 2164	. . 3 wff B e. RR
6	3, 5	wa 104	. 2 wff ( A e. RR /\ B e. RR )
7		cmul 7877	. . . 4 class x.
8	1, 4, 7	co 5918	. . 3 class ( A x. B )
9	8, 2	wcel 2164	. 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  8000