Definition df-gbow 41637

Description: Define the set of weak odd Goldbach numbers, which are positive odd integers that can be expressed as the sum of three primes. By this definition, the weak ternary Goldbach conjecture can be expressed as A. m e. Odd ( 5 < m -> m e. GoldbachOddW ). (Contributed by AV, 14-Jun-2020.)

Assertion

Ref	Expression
df-gbow	|- GoldbachOddW = { z e. Odd | E. p e. Prime E. q e. Prime E. r e. Prime z = ( ( p + q ) + r ) }

Distinct variable group:   z, p, q, r

Detailed syntax breakdown of Definition df-gbow

Step	Hyp	Ref	Expression
1		cgbow 41634	. 2 class GoldbachOddW
2		vz	. . . . . . . 8 setvar z
3	2	cv 1482	. . . . . . 7 class z
4		vp	. . . . . . . . . 10 setvar p
5	4	cv 1482	. . . . . . . . 9 class p
6		vq	. . . . . . . . . 10 setvar q
7	6	cv 1482	. . . . . . . . 9 class q
8		caddc 9939	. . . . . . . . 9 class +
9	5, 7, 8	co 6650	. . . . . . . 8 class ( p + q )
10		vr	. . . . . . . . 9 setvar r
11	10	cv 1482	. . . . . . . 8 class r
12	9, 11, 8	co 6650	. . . . . . 7 class ( ( p + q ) + r )
13	3, 12	wceq 1483	. . . . . 6 wff z = ( ( p + q ) + r )
14		cprime 15385	. . . . . 6 class Prime
15	13, 10, 14	wrex 2913	. . . . 5 wff E. r e. Prime z = ( ( p + q ) + r )
16	15, 6, 14	wrex 2913	. . . 4 wff E. q e. Prime E. r e. Prime z = ( ( p + q ) + r )
17	16, 4, 14	wrex 2913	. . 3 wff E. p e. Prime E. q e. Prime E. r e. Prime z = ( ( p + q ) + r )
18		codd 41538	. . 3 class Odd
19	17, 2, 18	crab 2916	. 2 class { z e. Odd | E. p e. Prime E. q e. Prime E. r e. Prime z = ( ( p + q ) + r ) }
20	1, 19	wceq 1483	1 wff GoldbachOddW = { z e. Odd | E. p e. Prime E. q e. Prime E. r e. Prime z = ( ( p + q ) + r ) }

This definition is referenced by:  isgbow  41640