Axiom ax-addrcl 7971

Description: Closure law for addition in the real subfield of complex numbers. Axiom for real and complex numbers, justified by Theorem axaddrcl 7927. Proofs should normally use readdcl 8000 instead. (New usage is discouraged.) (Contributed by NM, 22-Nov-1994.)

Assertion

Ref	Expression
ax-addrcl	|- ( ( A e. RR /\ B e. RR ) -> ( A + B ) e. RR )

Detailed syntax breakdown of Axiom ax-addrcl

Step	Hyp	Ref	Expression
1		cA	. . . 4 class A
2		cr 7873	. . . 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		caddc 7877	. . . 4 class +
8	1, 4, 7	co 5919	. . 3 class ( A + B )
9	8, 2	wcel 2164	. 2 wff ( A + B ) e. RR
10	6, 9	wi 4	1 wff ( ( A e. RR /\ B e. RR ) -> ( A + B ) e. RR )

This axiom is referenced by:  readdcl  8000