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Theorem f1oiso2 7085
 Description: Any one-to-one onto function determines an isomorphism with an induced relation 𝑆. (Contributed by Mario Carneiro, 9-Mar-2013.)
Hypothesis
Ref Expression
f1oiso2.1 𝑆 = {⟨𝑥, 𝑦⟩ ∣ ((𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦))}
Assertion
Ref Expression
f1oiso2 (𝐻:𝐴1-1-onto𝐵𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵))
Distinct variable groups:   𝑥,𝐴,𝑦   𝑥,𝐵,𝑦   𝑥,𝐻,𝑦   𝑥,𝑅,𝑦
Allowed substitution hints:   𝑆(𝑥,𝑦)

Proof of Theorem f1oiso2
Dummy variables 𝑤 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 f1oiso2.1 . . 3 𝑆 = {⟨𝑥, 𝑦⟩ ∣ ((𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦))}
2 f1ocnvdm 7020 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵𝑥𝐵) → (𝐻𝑥) ∈ 𝐴)
32adantrr 716 . . . . . . . 8 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑥𝐵𝑦𝐵)) → (𝐻𝑥) ∈ 𝐴)
433adant3 1129 . . . . . . 7 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)) → (𝐻𝑥) ∈ 𝐴)
5 f1ocnvdm 7020 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵𝑦𝐵) → (𝐻𝑦) ∈ 𝐴)
65adantrl 715 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑥𝐵𝑦𝐵)) → (𝐻𝑦) ∈ 𝐴)
763adant3 1129 . . . . . . . 8 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)) → (𝐻𝑦) ∈ 𝐴)
8 f1ocnvfv2 7013 . . . . . . . . . . 11 ((𝐻:𝐴1-1-onto𝐵𝑥𝐵) → (𝐻‘(𝐻𝑥)) = 𝑥)
98eqcomd 2804 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵𝑥𝐵) → 𝑥 = (𝐻‘(𝐻𝑥)))
10 f1ocnvfv2 7013 . . . . . . . . . . 11 ((𝐻:𝐴1-1-onto𝐵𝑦𝐵) → (𝐻‘(𝐻𝑦)) = 𝑦)
1110eqcomd 2804 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵𝑦𝐵) → 𝑦 = (𝐻‘(𝐻𝑦)))
129, 11anim12dan 621 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑥𝐵𝑦𝐵)) → (𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻‘(𝐻𝑦))))
13123adant3 1129 . . . . . . . 8 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)) → (𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻‘(𝐻𝑦))))
14 simp3 1135 . . . . . . . 8 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)) → (𝐻𝑥)𝑅(𝐻𝑦))
15 fveq2 6646 . . . . . . . . . . . 12 (𝑤 = (𝐻𝑦) → (𝐻𝑤) = (𝐻‘(𝐻𝑦)))
1615eqeq2d 2809 . . . . . . . . . . 11 (𝑤 = (𝐻𝑦) → (𝑦 = (𝐻𝑤) ↔ 𝑦 = (𝐻‘(𝐻𝑦))))
1716anbi2d 631 . . . . . . . . . 10 (𝑤 = (𝐻𝑦) → ((𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻𝑤)) ↔ (𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻‘(𝐻𝑦)))))
18 breq2 5035 . . . . . . . . . 10 (𝑤 = (𝐻𝑦) → ((𝐻𝑥)𝑅𝑤 ↔ (𝐻𝑥)𝑅(𝐻𝑦)))
1917, 18anbi12d 633 . . . . . . . . 9 (𝑤 = (𝐻𝑦) → (((𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻𝑤)) ∧ (𝐻𝑥)𝑅𝑤) ↔ ((𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻‘(𝐻𝑦))) ∧ (𝐻𝑥)𝑅(𝐻𝑦))))
2019rspcev 3571 . . . . . . . 8 (((𝐻𝑦) ∈ 𝐴 ∧ ((𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻‘(𝐻𝑦))) ∧ (𝐻𝑥)𝑅(𝐻𝑦))) → ∃𝑤𝐴 ((𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻𝑤)) ∧ (𝐻𝑥)𝑅𝑤))
217, 13, 14, 20syl12anc 835 . . . . . . 7 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)) → ∃𝑤𝐴 ((𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻𝑤)) ∧ (𝐻𝑥)𝑅𝑤))
22 fveq2 6646 . . . . . . . . . . . 12 (𝑧 = (𝐻𝑥) → (𝐻𝑧) = (𝐻‘(𝐻𝑥)))
2322eqeq2d 2809 . . . . . . . . . . 11 (𝑧 = (𝐻𝑥) → (𝑥 = (𝐻𝑧) ↔ 𝑥 = (𝐻‘(𝐻𝑥))))
2423anbi1d 632 . . . . . . . . . 10 (𝑧 = (𝐻𝑥) → ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ↔ (𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻𝑤))))
25 breq1 5034 . . . . . . . . . 10 (𝑧 = (𝐻𝑥) → (𝑧𝑅𝑤 ↔ (𝐻𝑥)𝑅𝑤))
2624, 25anbi12d 633 . . . . . . . . 9 (𝑧 = (𝐻𝑥) → (((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤) ↔ ((𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻𝑤)) ∧ (𝐻𝑥)𝑅𝑤)))
2726rexbidv 3256 . . . . . . . 8 (𝑧 = (𝐻𝑥) → (∃𝑤𝐴 ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤) ↔ ∃𝑤𝐴 ((𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻𝑤)) ∧ (𝐻𝑥)𝑅𝑤)))
2827rspcev 3571 . . . . . . 7 (((𝐻𝑥) ∈ 𝐴 ∧ ∃𝑤𝐴 ((𝑥 = (𝐻‘(𝐻𝑥)) ∧ 𝑦 = (𝐻𝑤)) ∧ (𝐻𝑥)𝑅𝑤)) → ∃𝑧𝐴𝑤𝐴 ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤))
294, 21, 28syl2anc 587 . . . . . 6 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)) → ∃𝑧𝐴𝑤𝐴 ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤))
30293expib 1119 . . . . 5 (𝐻:𝐴1-1-onto𝐵 → (((𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)) → ∃𝑧𝐴𝑤𝐴 ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)))
31 simp3ll 1241 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → 𝑥 = (𝐻𝑧))
32 simp1 1133 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → 𝐻:𝐴1-1-onto𝐵)
33 simp2l 1196 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → 𝑧𝐴)
34 f1of 6591 . . . . . . . . . . 11 (𝐻:𝐴1-1-onto𝐵𝐻:𝐴𝐵)
3534ffvelrnda 6829 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵𝑧𝐴) → (𝐻𝑧) ∈ 𝐵)
3632, 33, 35syl2anc 587 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → (𝐻𝑧) ∈ 𝐵)
3731, 36eqeltrd 2890 . . . . . . . 8 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → 𝑥𝐵)
38 simp3lr 1242 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → 𝑦 = (𝐻𝑤))
39 simp2r 1197 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → 𝑤𝐴)
4034ffvelrnda 6829 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵𝑤𝐴) → (𝐻𝑤) ∈ 𝐵)
4132, 39, 40syl2anc 587 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → (𝐻𝑤) ∈ 𝐵)
4238, 41eqeltrd 2890 . . . . . . . 8 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → 𝑦𝐵)
43 simp3r 1199 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → 𝑧𝑅𝑤)
4431eqcomd 2804 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → (𝐻𝑧) = 𝑥)
45 f1ocnvfv 7014 . . . . . . . . . . 11 ((𝐻:𝐴1-1-onto𝐵𝑧𝐴) → ((𝐻𝑧) = 𝑥 → (𝐻𝑥) = 𝑧))
4632, 33, 45syl2anc 587 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → ((𝐻𝑧) = 𝑥 → (𝐻𝑥) = 𝑧))
4744, 46mpd 15 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → (𝐻𝑥) = 𝑧)
4838eqcomd 2804 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → (𝐻𝑤) = 𝑦)
49 f1ocnvfv 7014 . . . . . . . . . . 11 ((𝐻:𝐴1-1-onto𝐵𝑤𝐴) → ((𝐻𝑤) = 𝑦 → (𝐻𝑦) = 𝑤))
5032, 39, 49syl2anc 587 . . . . . . . . . 10 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → ((𝐻𝑤) = 𝑦 → (𝐻𝑦) = 𝑤))
5148, 50mpd 15 . . . . . . . . 9 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → (𝐻𝑦) = 𝑤)
5243, 47, 513brtr4d 5063 . . . . . . . 8 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → (𝐻𝑥)𝑅(𝐻𝑦))
5337, 42, 52jca31 518 . . . . . . 7 ((𝐻:𝐴1-1-onto𝐵 ∧ (𝑧𝐴𝑤𝐴) ∧ ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)) → ((𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)))
54533exp 1116 . . . . . 6 (𝐻:𝐴1-1-onto𝐵 → ((𝑧𝐴𝑤𝐴) → (((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤) → ((𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)))))
5554rexlimdvv 3252 . . . . 5 (𝐻:𝐴1-1-onto𝐵 → (∃𝑧𝐴𝑤𝐴 ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤) → ((𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦))))
5630, 55impbid 215 . . . 4 (𝐻:𝐴1-1-onto𝐵 → (((𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦)) ↔ ∃𝑧𝐴𝑤𝐴 ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)))
5756opabbidv 5097 . . 3 (𝐻:𝐴1-1-onto𝐵 → {⟨𝑥, 𝑦⟩ ∣ ((𝑥𝐵𝑦𝐵) ∧ (𝐻𝑥)𝑅(𝐻𝑦))} = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧𝐴𝑤𝐴 ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)})
581, 57syl5eq 2845 . 2 (𝐻:𝐴1-1-onto𝐵𝑆 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧𝐴𝑤𝐴 ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)})
59 f1oiso 7084 . 2 ((𝐻:𝐴1-1-onto𝐵𝑆 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧𝐴𝑤𝐴 ((𝑥 = (𝐻𝑧) ∧ 𝑦 = (𝐻𝑤)) ∧ 𝑧𝑅𝑤)}) → 𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵))
6058, 59mpdan 686 1 (𝐻:𝐴1-1-onto𝐵𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ wa 399   ∧ w3a 1084   = wceq 1538   ∈ wcel 2111  ∃wrex 3107   class class class wbr 5031  {copab 5093  ◡ccnv 5519  –1-1-onto→wf1o 6324  ‘cfv 6325   Isom wiso 6326 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5168  ax-nul 5175  ax-pow 5232  ax-pr 5296 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-rab 3115  df-v 3443  df-sbc 3721  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-sn 4526  df-pr 4528  df-op 4532  df-uni 4802  df-br 5032  df-opab 5094  df-id 5426  df-xp 5526  df-rel 5527  df-cnv 5528  df-co 5529  df-dm 5530  df-rn 5531  df-res 5532  df-ima 5533  df-iota 6284  df-fun 6327  df-fn 6328  df-f 6329  df-f1 6330  df-fo 6331  df-f1o 6332  df-fv 6333  df-isom 6334 This theorem is referenced by:  fnwelem  7811
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