Theorem smoiso2 8035

Description: The strictly monotone ordinal functions are also isomorphisms of subclasses of On equipped with the membership relation. (Contributed by Mario Carneiro, 20-Mar-2013.)

Assertion

Ref	Expression
smoiso2	⊢ ((Ord 𝐴 ∧ 𝐵 ⊆ On) → ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) ↔ 𝐹 Isom E , E (𝐴, 𝐵)))

Proof of Theorem smoiso2

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

Step	Hyp	Ref	Expression
1		fof 6592	. . . . . . 7 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵)
2		smo11 8030	. . . . . . 7 ⊢ ((𝐹:𝐴⟶𝐵 ∧ Smo 𝐹) → 𝐹:𝐴–1-1→𝐵)
3	1, 2	sylan 583	. . . . . 6 ⊢ ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → 𝐹:𝐴–1-1→𝐵)
4		simpl 486	. . . . . 6 ⊢ ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → 𝐹:𝐴–onto→𝐵)
5		df-f1o 6346	. . . . . 6 ⊢ (𝐹:𝐴–1-1-onto→𝐵 ↔ (𝐹:𝐴–1-1→𝐵 ∧ 𝐹:𝐴–onto→𝐵))
6	3, 4, 5	sylanbrc 586	. . . . 5 ⊢ ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → 𝐹:𝐴–1-1-onto→𝐵)
7	6	adantl 485	. . . 4 ⊢ (((Ord 𝐴 ∧ 𝐵 ⊆ On) ∧ (𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹)) → 𝐹:𝐴–1-1-onto→𝐵)
8		fofn 6594	. . . . . 6 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹 Fn 𝐴)
9		smoord 8031	. . . . . . . 8 ⊢ (((𝐹 Fn 𝐴 ∧ Smo 𝐹) ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → (𝑥 ∈ 𝑦 ↔ (𝐹‘𝑥) ∈ (𝐹‘𝑦)))
10		epel 5437	. . . . . . . 8 ⊢ (𝑥 E 𝑦 ↔ 𝑥 ∈ 𝑦)
11		fvex 6687	. . . . . . . . 9 ⊢ (𝐹‘𝑦) ∈ V
12	11	epeli 5436	. . . . . . . 8 ⊢ ((𝐹‘𝑥) E (𝐹‘𝑦) ↔ (𝐹‘𝑥) ∈ (𝐹‘𝑦))
13	9, 10, 12	3bitr4g 317	. . . . . . 7 ⊢ (((𝐹 Fn 𝐴 ∧ Smo 𝐹) ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → (𝑥 E 𝑦 ↔ (𝐹‘𝑥) E (𝐹‘𝑦)))
14	13	ralrimivva 3103	. . . . . 6 ⊢ ((𝐹 Fn 𝐴 ∧ Smo 𝐹) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥 E 𝑦 ↔ (𝐹‘𝑥) E (𝐹‘𝑦)))
15	8, 14	sylan 583	. . . . 5 ⊢ ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥 E 𝑦 ↔ (𝐹‘𝑥) E (𝐹‘𝑦)))
16	15	adantl 485	. . . 4 ⊢ (((Ord 𝐴 ∧ 𝐵 ⊆ On) ∧ (𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹)) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥 E 𝑦 ↔ (𝐹‘𝑥) E (𝐹‘𝑦)))
17		df-isom 6348	. . . 4 ⊢ (𝐹 Isom E , E (𝐴, 𝐵) ↔ (𝐹:𝐴–1-1-onto→𝐵 ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥 E 𝑦 ↔ (𝐹‘𝑥) E (𝐹‘𝑦))))
18	7, 16, 17	sylanbrc 586	. . 3 ⊢ (((Ord 𝐴 ∧ 𝐵 ⊆ On) ∧ (𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹)) → 𝐹 Isom E , E (𝐴, 𝐵))
19	18	ex 416	. 2 ⊢ ((Ord 𝐴 ∧ 𝐵 ⊆ On) → ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → 𝐹 Isom E , E (𝐴, 𝐵)))
20		isof1o 7089	. . . . . . 7 ⊢ (𝐹 Isom E , E (𝐴, 𝐵) → 𝐹:𝐴–1-1-onto→𝐵)
21		f1ofo 6625	. . . . . . 7 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴–onto→𝐵)
22	20, 21	syl 17	. . . . . 6 ⊢ (𝐹 Isom E , E (𝐴, 𝐵) → 𝐹:𝐴–onto→𝐵)
23	22	3ad2ant1 1134	. . . . 5 ⊢ ((𝐹 Isom E , E (𝐴, 𝐵) ∧ Ord 𝐴 ∧ 𝐵 ⊆ On) → 𝐹:𝐴–onto→𝐵)
24		smoiso 8028	. . . . 5 ⊢ ((𝐹 Isom E , E (𝐴, 𝐵) ∧ Ord 𝐴 ∧ 𝐵 ⊆ On) → Smo 𝐹)
25	23, 24	jca 515	. . . 4 ⊢ ((𝐹 Isom E , E (𝐴, 𝐵) ∧ Ord 𝐴 ∧ 𝐵 ⊆ On) → (𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹))
26	25	3expib 1123	. . 3 ⊢ (𝐹 Isom E , E (𝐴, 𝐵) → ((Ord 𝐴 ∧ 𝐵 ⊆ On) → (𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹)))
27	26	com12 32	. 2 ⊢ ((Ord 𝐴 ∧ 𝐵 ⊆ On) → (𝐹 Isom E , E (𝐴, 𝐵) → (𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹)))
28	19, 27	impbid 215	1 ⊢ ((Ord 𝐴 ∧ 𝐵 ⊆ On) → ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) ↔ 𝐹 Isom E , E (𝐴, 𝐵)))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   ∧ w3a 1088   ∈ wcel 2114  ∀wral 3053   ⊆ wss 3843   class class class wbr 5030   E cep 5433  Ord word 6171  Oncon0 6172   Fn wfn 6334  ⟶wf 6335  –1-1→wf1 6336  –onto→wfo 6337  –1-1-onto→wf1o 6338  ‘cfv 6339   Isom wiso 6340  Smo wsmo 8011

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1975  ax-7 2020  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2162  ax-12 2179  ax-ext 2710  ax-sep 5167  ax-nul 5174  ax-pr 5296

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 847  df-3or 1089  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1787  df-nf 1791  df-sb 2075  df-mo 2540  df-eu 2570  df-clab 2717  df-cleq 2730  df-clel 2811  df-nfc 2881  df-ne 2935  df-ral 3058  df-rex 3059  df-rab 3062  df-v 3400  df-sbc 3681  df-dif 3846  df-un 3848  df-in 3850  df-ss 3860  df-pss 3862  df-nul 4212  df-if 4415  df-pw 4490  df-sn 4517  df-pr 4519  df-op 4523  df-uni 4797  df-br 5031  df-opab 5093  df-tr 5137  df-id 5429  df-eprel 5434  df-po 5442  df-so 5443  df-fr 5483  df-we 5485  df-xp 5531  df-rel 5532  df-cnv 5533  df-co 5534  df-dm 5535  df-rn 5536  df-ord 6175  df-on 6176  df-iota 6297  df-fun 6341  df-fn 6342  df-f 6343  df-f1 6344  df-fo 6345  df-f1o 6346  df-fv 6347  df-isom 6348  df-smo 8012

This theorem is referenced by:  oismo  9077  cofsmo  9769