Theorem phialllem2 4617

Description: Lemma for phiall 4618. Any set without 0_c is equal to the Phi of a set. (Contributed by Scott Fenton, 8-Apr-2021.)

Hypothesis

Ref	Expression
phiall.1	|- A e. _V

Assertion

Ref	Expression
phialllem2	|- (-. 0c e. A -> E.x A = Phi x)

Distinct variable group:   x,A

Proof of Theorem phialllem2

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		inss2 3476	. . 3 |- (A i^i Nn ) C_ Nn
2		inss1 3475	. . . . 5 |- (A i^i Nn ) C_ A
3	2	sseli 3269	. . . 4 |- (0c e. (A i^i Nn ) -> 0c e. A)
4	3	con3i 127	. . 3 |- (-. 0c e. A -> -. 0c e. (A i^i Nn ))
5		phiall.1	. . . . 5 |- A e. _V
6		nncex 4396	. . . . 5 |- Nn e. _V
7	5, 6	inex 4105	. . . 4 |- (A i^i Nn ) e. _V
8	7	phialllem1 4616	. . 3 |- (((A i^i Nn ) C_ Nn /\ -. 0c e. (A i^i Nn )) -> E.y(A i^i Nn ) = Phi y)
9	1, 4, 8	sylancr 644	. 2 |- (-. 0c e. A -> E.y(A i^i Nn ) = Phi y)
10		uncom 3408	. . . . . . 7 |- ((A \ Nn ) u. (A i^i Nn )) = ((A i^i Nn ) u. (A \ Nn ))
11		inundif 3628	. . . . . . 7 |- ((A i^i Nn ) u. (A \ Nn )) = A
12	10, 11	eqtri 2373	. . . . . 6 |- ((A \ Nn ) u. (A i^i Nn )) = A
13		uneq2 3412	. . . . . 6 |- ((A i^i Nn ) = Phi y -> ((A \ Nn ) u. (A i^i Nn )) = ((A \ Nn ) u. Phi y))
14	12, 13	syl5eqr 2399	. . . . 5 |- ((A i^i Nn ) = Phi y -> A = ((A \ Nn ) u. Phi y))
15		phiun 4614	. . . . . 6 |- Phi ((A \ Nn ) u. y) = ( Phi (A \ Nn ) u. Phi y)
16		incom 3448	. . . . . . . . 9 |- ((A \ Nn ) i^i Nn ) = ( Nn i^i (A \ Nn ))
17		disjdif 3622	. . . . . . . . 9 |- ( Nn i^i (A \ Nn )) = (/)
18	16, 17	eqtri 2373	. . . . . . . 8 |- ((A \ Nn ) i^i Nn ) = (/)
19		phidisjnn 4615	. . . . . . . 8 |- (((A \ Nn ) i^i Nn ) = (/) -> Phi (A \ Nn ) = (A \ Nn ))
20	18, 19	ax-mp 8	. . . . . . 7 |- Phi (A \ Nn ) = (A \ Nn )
21	20	uneq1i 3414	. . . . . 6 |- ( Phi (A \ Nn ) u. Phi y) = ((A \ Nn ) u. Phi y)
22	15, 21	eqtri 2373	. . . . 5 |- Phi ((A \ Nn ) u. y) = ((A \ Nn ) u. Phi y)
23	14, 22	syl6eqr 2403	. . . 4 |- ((A i^i Nn ) = Phi y -> A = Phi ((A \ Nn ) u. y))
24	5, 6	difex 4107	. . . . . 6 |- (A \ Nn ) e. _V
25		vex 2862	. . . . . 6 |- y e. _V
26	24, 25	unex 4106	. . . . 5 |- ((A \ Nn ) u. y) e. _V
27		phieq 4570	. . . . . 6 |- (x = ((A \ Nn ) u. y) -> Phi x = Phi ((A \ Nn ) u. y))
28	27	eqeq2d 2364	. . . . 5 |- (x = ((A \ Nn ) u. y) -> (A = Phi x <-> A = Phi ((A \ Nn ) u. y)))
29	26, 28	spcev 2946	. . . 4 |- (A = Phi ((A \ Nn ) u. y) -> E.x A = Phi x)
30	23, 29	syl 15	. . 3 |- ((A i^i Nn ) = Phi y -> E.x A = Phi x)
31	30	exlimiv 1634	. 2 |- (E.y(A i^i Nn ) = Phi y -> E.x A = Phi x)
32	9, 31	syl 15	1 |- (-. 0c e. A -> E.x A = Phi x)

Syntax hints:  -. wn 3   -> wi 4  E.wex 1541   = wceq 1642   e. wcel 1710  _Vcvv 2859   \ cdif 3206   u. cun 3207   i^i cin 3208   C_ wss 3257  (/)c0 3550   Nn cnnc 4373  0_cc0c 4374   Phi cphi 4562

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334  ax-nin 4078  ax-xp 4079  ax-cnv 4080  ax-1c 4081  ax-sset 4082  ax-si 4083  ax-ins2 4084  ax-ins3 4085  ax-typlower 4086  ax-sn 4087

This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2478  df-ne 2518  df-ral 2619  df-rex 2620  df-rab 2623  df-v 2861  df-sbc 3047  df-nin 3211  df-compl 3212  df-in 3213  df-un 3214  df-dif 3215  df-symdif 3216  df-ss 3259  df-nul 3551  df-if 3663  df-pw 3724  df-sn 3741  df-pr 3742  df-uni 3892  df-int 3927  df-opk 4058  df-1c 4136  df-pw1 4137  df-uni1 4138  df-xpk 4185  df-cnvk 4186  df-ins2k 4187  df-ins3k 4188  df-imak 4189  df-cok 4190  df-p6 4191  df-sik 4192  df-ssetk 4193  df-imagek 4194  df-idk 4195  df-0c 4377  df-addc 4378  df-nnc 4379  df-phi 4565

This theorem is referenced by:  phiall  4618