Axiom ax-addrcl 7976

Description: Closure law for addition in the real subfield of complex numbers. Axiom for real and complex numbers, justified by Theorem axaddrcl 7932. Proofs should normally use readdcl 8005 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 7878	. . . 4 class RR
3	1, 2	wcel 2167	. . 3 wff A e. RR
4		cB	. . . 4 class B
5	4, 2	wcel 2167	. . 3 wff B e. RR
6	3, 5	wa 104	. 2 wff ( A e. RR /\ B e. RR )
7		caddc 7882	. . . 4 class +
8	1, 4, 7	co 5922	. . 3 class ( A + B )
9	8, 2	wcel 2167	. 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  8005