Theorem zfregfr 4672

Description: The epsilon relation is well-founded on any class. (Contributed by NM, 26-Nov-1995.)

Assertion

Ref	Expression
zfregfr	⊢ E Fr 𝐴

Proof of Theorem zfregfr

Dummy variables 𝑠 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-frind 4429	. 2 ⊢ ( E Fr 𝐴 ↔ ∀𝑠 FrFor E 𝐴𝑠)
2		bi2.04 248	. . . . . . 7 ⊢ ((∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠)) ↔ (𝑥 ∈ 𝐴 → (∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → 𝑥 ∈ 𝑠)))
3	2	albii 1518	. . . . . 6 ⊢ (∀𝑥(∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠)) ↔ ∀𝑥(𝑥 ∈ 𝐴 → (∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → 𝑥 ∈ 𝑠)))
4		df-ral 2515	. . . . . 6 ⊢ (∀𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → 𝑥 ∈ 𝑠) ↔ ∀𝑥(𝑥 ∈ 𝐴 → (∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → 𝑥 ∈ 𝑠)))
5	3, 4	bitr4i 187	. . . . 5 ⊢ (∀𝑥(∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠)) ↔ ∀𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → 𝑥 ∈ 𝑠))
6		sbim 2006	. . . . . . . . . . 11 ⊢ ([𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) ↔ ([𝑦 / 𝑥]𝑥 ∈ 𝐴 → [𝑦 / 𝑥]𝑥 ∈ 𝑠))
7		clelsb1 2336	. . . . . . . . . . . 12 ⊢ ([𝑦 / 𝑥]𝑥 ∈ 𝐴 ↔ 𝑦 ∈ 𝐴)
8		clelsb1 2336	. . . . . . . . . . . 12 ⊢ ([𝑦 / 𝑥]𝑥 ∈ 𝑠 ↔ 𝑦 ∈ 𝑠)
9	7, 8	imbi12i 239	. . . . . . . . . . 11 ⊢ (([𝑦 / 𝑥]𝑥 ∈ 𝐴 → [𝑦 / 𝑥]𝑥 ∈ 𝑠) ↔ (𝑦 ∈ 𝐴 → 𝑦 ∈ 𝑠))
10	6, 9	bitri 184	. . . . . . . . . 10 ⊢ ([𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) ↔ (𝑦 ∈ 𝐴 → 𝑦 ∈ 𝑠))
11	10	ralbii 2538	. . . . . . . . 9 ⊢ (∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) ↔ ∀𝑦 ∈ 𝑥 (𝑦 ∈ 𝐴 → 𝑦 ∈ 𝑠))
12		ralcom3 2701	. . . . . . . . 9 ⊢ (∀𝑦 ∈ 𝑥 (𝑦 ∈ 𝐴 → 𝑦 ∈ 𝑠) ↔ ∀𝑦 ∈ 𝐴 (𝑦 ∈ 𝑥 → 𝑦 ∈ 𝑠))
13	11, 12	bitri 184	. . . . . . . 8 ⊢ (∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) ↔ ∀𝑦 ∈ 𝐴 (𝑦 ∈ 𝑥 → 𝑦 ∈ 𝑠))
14		epel 4389	. . . . . . . . . 10 ⊢ (𝑦 E 𝑥 ↔ 𝑦 ∈ 𝑥)
15	14	imbi1i 238	. . . . . . . . 9 ⊢ ((𝑦 E 𝑥 → 𝑦 ∈ 𝑠) ↔ (𝑦 ∈ 𝑥 → 𝑦 ∈ 𝑠))
16	15	ralbii 2538	. . . . . . . 8 ⊢ (∀𝑦 ∈ 𝐴 (𝑦 E 𝑥 → 𝑦 ∈ 𝑠) ↔ ∀𝑦 ∈ 𝐴 (𝑦 ∈ 𝑥 → 𝑦 ∈ 𝑠))
17	13, 16	bitr4i 187	. . . . . . 7 ⊢ (∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) ↔ ∀𝑦 ∈ 𝐴 (𝑦 E 𝑥 → 𝑦 ∈ 𝑠))
18	17	imbi1i 238	. . . . . 6 ⊢ ((∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → 𝑥 ∈ 𝑠) ↔ (∀𝑦 ∈ 𝐴 (𝑦 E 𝑥 → 𝑦 ∈ 𝑠) → 𝑥 ∈ 𝑠))
19	18	ralbii 2538	. . . . 5 ⊢ (∀𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → 𝑥 ∈ 𝑠) ↔ ∀𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝐴 (𝑦 E 𝑥 → 𝑦 ∈ 𝑠) → 𝑥 ∈ 𝑠))
20	5, 19	bitri 184	. . . 4 ⊢ (∀𝑥(∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠)) ↔ ∀𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝐴 (𝑦 E 𝑥 → 𝑦 ∈ 𝑠) → 𝑥 ∈ 𝑠))
21		ax-setind 4635	. . . . 5 ⊢ (∀𝑥(∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠)) → ∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠))
22		ssalel 3215	. . . . 5 ⊢ (𝐴 ⊆ 𝑠 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠))
23	21, 22	sylibr 134	. . . 4 ⊢ (∀𝑥(∀𝑦 ∈ 𝑥 [𝑦 / 𝑥](𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠) → (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝑠)) → 𝐴 ⊆ 𝑠)
24	20, 23	sylbir 135	. . 3 ⊢ (∀𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝐴 (𝑦 E 𝑥 → 𝑦 ∈ 𝑠) → 𝑥 ∈ 𝑠) → 𝐴 ⊆ 𝑠)
25		df-frfor 4428	. . 3 ⊢ ( FrFor E 𝐴𝑠 ↔ (∀𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝐴 (𝑦 E 𝑥 → 𝑦 ∈ 𝑠) → 𝑥 ∈ 𝑠) → 𝐴 ⊆ 𝑠))
26	24, 25	mpbir 146	. 2 ⊢ FrFor E 𝐴𝑠
27	1, 26	mpgbir 1501	1 ⊢ E Fr 𝐴

Syntax hints:   → wi 4  ∀wal 1395  [wsb 1810   ∈ wcel 2202  ∀wral 2510   ⊆ wss 3200   class class class wbr 4088   E cep 4384   FrFor wfrfor 4424   Fr wfr 4425

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-setind 4635

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-br 4089  df-opab 4151  df-eprel 4386  df-frfor 4428  df-frind 4429

This theorem is referenced by:  ordfr  4673  wessep  4676  reg3exmidlemwe  4677