Axiom ax-bgbltosilvaOLD 41706

Description: Obsolete version of ax-bgbltosilva 41698 as of 9-Sep-2021. (Contributed by AV, 3-Aug-2020.) (New usage is discouraged.)

Assertion

Ref	Expression
ax-bgbltosilvaOLD	|- ( ( N e. Even /\ 4 < N /\ N <_ ( 4 x. ( 10 ^; 1 8 ) ) ) -> N e. GoldbachEven )

Detailed syntax breakdown of Axiom ax-bgbltosilvaOLD

Step	Hyp	Ref	Expression
1		cN	. . . 4 class N
2		ceven 41537	. . . 4 class Even
3	1, 2	wcel 1990	. . 3 wff N e. Even
4		c4 11072	. . . 4 class 4
5		clt 10074	. . . 4 class <
6	4, 1, 5	wbr 4653	. . 3 wff 4 < N
7		c10 11078	. . . . . 6 class 10
8		c1 9937	. . . . . . 7 class 1
9		c8 11076	. . . . . . 7 class 8
10	8, 9	cdc 11493	. . . . . 6 class ; 1 8
11		cexp 12860	. . . . . 6 class ^
12	7, 10, 11	co 6650	. . . . 5 class ( 10 ^; 1 8 )
13		cmul 9941	. . . . 5 class x.
14	4, 12, 13	co 6650	. . . 4 class ( 4 x. ( 10 ^; 1 8 ) )
15		cle 10075	. . . 4 class <_
16	1, 14, 15	wbr 4653	. . 3 wff N <_ ( 4 x. ( 10 ^; 1 8 ) )
17	3, 6, 16	w3a 1037	. 2 wff ( N e. Even /\ 4 < N /\ N <_ ( 4 x. ( 10 ^; 1 8 ) ) )
18		cgbe 41633	. . 3 class GoldbachEven
19	1, 18	wcel 1990	. 2 wff N e. GoldbachEven
20	17, 19	wi 4	1 wff ( ( N e. Even /\ 4 < N /\ N <_ ( 4 x. ( 10 ^; 1 8 ) ) ) -> N e. GoldbachEven )

This axiom is referenced by:  bgoldbachltOLD  41707  tgblthelfgottOLD  41709