Theorem smoiso2 8295

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 6740	. . . . . . 7 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹:𝐴⟶𝐵)
2		smo11 8290	. . . . . . 7 ⊢ ((𝐹:𝐴⟶𝐵 ∧ Smo 𝐹) → 𝐹:𝐴–1-1→𝐵)
3	1, 2	sylan 580	. . . . . 6 ⊢ ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → 𝐹:𝐴–1-1→𝐵)
4		simpl 482	. . . . . 6 ⊢ ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → 𝐹:𝐴–onto→𝐵)
5		df-f1o 6493	. . . . . 6 ⊢ (𝐹:𝐴–1-1-onto→𝐵 ↔ (𝐹:𝐴–1-1→𝐵 ∧ 𝐹:𝐴–onto→𝐵))
6	3, 4, 5	sylanbrc 583	. . . . 5 ⊢ ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → 𝐹:𝐴–1-1-onto→𝐵)
7	6	adantl 481	. . . 4 ⊢ (((Ord 𝐴 ∧ 𝐵 ⊆ On) ∧ (𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹)) → 𝐹:𝐴–1-1-onto→𝐵)
8		fofn 6742	. . . . . 6 ⊢ (𝐹:𝐴–onto→𝐵 → 𝐹 Fn 𝐴)
9		smoord 8291	. . . . . . . 8 ⊢ (((𝐹 Fn 𝐴 ∧ Smo 𝐹) ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → (𝑥 ∈ 𝑦 ↔ (𝐹‘𝑥) ∈ (𝐹‘𝑦)))
10		epel 5522	. . . . . . . 8 ⊢ (𝑥 E 𝑦 ↔ 𝑥 ∈ 𝑦)
11		fvex 6841	. . . . . . . . 9 ⊢ (𝐹‘𝑦) ∈ V
12	11	epeli 5521	. . . . . . . 8 ⊢ ((𝐹‘𝑥) E (𝐹‘𝑦) ↔ (𝐹‘𝑥) ∈ (𝐹‘𝑦))
13	9, 10, 12	3bitr4g 314	. . . . . . 7 ⊢ (((𝐹 Fn 𝐴 ∧ Smo 𝐹) ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → (𝑥 E 𝑦 ↔ (𝐹‘𝑥) E (𝐹‘𝑦)))
14	13	ralrimivva 3176	. . . . . 6 ⊢ ((𝐹 Fn 𝐴 ∧ Smo 𝐹) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥 E 𝑦 ↔ (𝐹‘𝑥) E (𝐹‘𝑦)))
15	8, 14	sylan 580	. . . . 5 ⊢ ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥 E 𝑦 ↔ (𝐹‘𝑥) E (𝐹‘𝑦)))
16	15	adantl 481	. . . 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 6495	. . . 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 583	. . 3 ⊢ (((Ord 𝐴 ∧ 𝐵 ⊆ On) ∧ (𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹)) → 𝐹 Isom E , E (𝐴, 𝐵))
19	18	ex 412	. 2 ⊢ ((Ord 𝐴 ∧ 𝐵 ⊆ On) → ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) → 𝐹 Isom E , E (𝐴, 𝐵)))
20		isof1o 7263	. . . . . . 7 ⊢ (𝐹 Isom E , E (𝐴, 𝐵) → 𝐹:𝐴–1-1-onto→𝐵)
21		f1ofo 6775	. . . . . . 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 1133	. . . . 5 ⊢ ((𝐹 Isom E , E (𝐴, 𝐵) ∧ Ord 𝐴 ∧ 𝐵 ⊆ On) → 𝐹:𝐴–onto→𝐵)
24		smoiso 8288	. . . . 5 ⊢ ((𝐹 Isom E , E (𝐴, 𝐵) ∧ Ord 𝐴 ∧ 𝐵 ⊆ On) → Smo 𝐹)
25	23, 24	jca 511	. . . 4 ⊢ ((𝐹 Isom E , E (𝐴, 𝐵) ∧ Ord 𝐴 ∧ 𝐵 ⊆ On) → (𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹))
26	25	3expib 1122	. . 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 212	1 ⊢ ((Ord 𝐴 ∧ 𝐵 ⊆ On) → ((𝐹:𝐴–onto→𝐵 ∧ Smo 𝐹) ↔ 𝐹 Isom E , E (𝐴, 𝐵)))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   ∈ wcel 2113  ∀wral 3048   ⊆ wss 3898   class class class wbr 5093   E cep 5518  Ord word 6310  Oncon0 6311   Fn wfn 6481  ⟶wf 6482  –1-1→wf1 6483  –onto→wfo 6484  –1-1-onto→wf1o 6485  ‘cfv 6486   Isom wiso 6487  Smo wsmo 8271

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2705  ax-sep 5236  ax-nul 5246  ax-pr 5372

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-ne 2930  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-pss 3918  df-nul 4283  df-if 4475  df-pw 4551  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-br 5094  df-opab 5156  df-tr 5201  df-id 5514  df-eprel 5519  df-po 5527  df-so 5528  df-fr 5572  df-we 5574  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-ord 6314  df-on 6315  df-iota 6442  df-fun 6488  df-fn 6489  df-f 6490  df-f1 6491  df-fo 6492  df-f1o 6493  df-fv 6494  df-isom 6495  df-smo 8272

This theorem is referenced by:  oismo  9433  cofsmo  10167