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Theorem f1oiso 5731
 Description: Any one-to-one onto function determines an isomorphism with an induced relation 𝑆. Proposition 6.33 of [TakeutiZaring] p. 34. (Contributed by NM, 30-Apr-2004.)
Assertion
Ref Expression
f1oiso ((𝐻:𝐴1-1-onto𝐵𝑆 = {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)}) → 𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵))
Distinct variable groups:   𝑥,𝑦,𝑧,𝑤,𝐴   𝑥,𝐵,𝑦   𝑥,𝐻,𝑦,𝑧,𝑤   𝑥,𝑅,𝑦,𝑧,𝑤
Allowed substitution hints:   𝐵(𝑧,𝑤)   𝑆(𝑥,𝑦,𝑧,𝑤)

Proof of Theorem f1oiso
Dummy variables 𝑣 𝑢 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simpl 108 . 2 ((𝐻:𝐴1-1-onto𝐵𝑆 = {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)}) → 𝐻:𝐴1-1-onto𝐵)
2 f1of1 5370 . . 3 (𝐻:𝐴1-1-onto𝐵𝐻:𝐴1-1𝐵)
3 df-br 3934 . . . . 5 ((𝐻𝑣)𝑆(𝐻𝑢) ↔ ⟨(𝐻𝑣), (𝐻𝑢)⟩ ∈ 𝑆)
4 eleq2 2204 . . . . . . 7 (𝑆 = {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)} → (⟨(𝐻𝑣), (𝐻𝑢)⟩ ∈ 𝑆 ↔ ⟨(𝐻𝑣), (𝐻𝑢)⟩ ∈ {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)}))
5 f1fn 5334 . . . . . . . . 9 (𝐻:𝐴1-1𝐵𝐻 Fn 𝐴)
6 funfvex 5442 . . . . . . . . . . . 12 ((Fun 𝐻𝑣 ∈ dom 𝐻) → (𝐻𝑣) ∈ V)
76funfni 5227 . . . . . . . . . . 11 ((𝐻 Fn 𝐴𝑣𝐴) → (𝐻𝑣) ∈ V)
8 funfvex 5442 . . . . . . . . . . . 12 ((Fun 𝐻𝑢 ∈ dom 𝐻) → (𝐻𝑢) ∈ V)
98funfni 5227 . . . . . . . . . . 11 ((𝐻 Fn 𝐴𝑢𝐴) → (𝐻𝑢) ∈ V)
107, 9anim12dan 590 . . . . . . . . . 10 ((𝐻 Fn 𝐴 ∧ (𝑣𝐴𝑢𝐴)) → ((𝐻𝑣) ∈ V ∧ (𝐻𝑢) ∈ V))
11 eqeq1 2147 . . . . . . . . . . . . . 14 (𝑧 = (𝐻𝑣) → (𝑧 = (𝐻𝑥) ↔ (𝐻𝑣) = (𝐻𝑥)))
1211anbi1d 461 . . . . . . . . . . . . 13 (𝑧 = (𝐻𝑣) → ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ↔ ((𝐻𝑣) = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦))))
1312anbi1d 461 . . . . . . . . . . . 12 (𝑧 = (𝐻𝑣) → (((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ (((𝐻𝑣) = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)))
14132rexbidv 2461 . . . . . . . . . . 11 (𝑧 = (𝐻𝑣) → (∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ ∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)))
15 eqeq1 2147 . . . . . . . . . . . . . 14 (𝑤 = (𝐻𝑢) → (𝑤 = (𝐻𝑦) ↔ (𝐻𝑢) = (𝐻𝑦)))
1615anbi2d 460 . . . . . . . . . . . . 13 (𝑤 = (𝐻𝑢) → (((𝐻𝑣) = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ↔ ((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦))))
1716anbi1d 461 . . . . . . . . . . . 12 (𝑤 = (𝐻𝑢) → ((((𝐻𝑣) = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)))
18172rexbidv 2461 . . . . . . . . . . 11 (𝑤 = (𝐻𝑢) → (∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ ∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)))
1914, 18opelopabg 4194 . . . . . . . . . 10 (((𝐻𝑣) ∈ V ∧ (𝐻𝑢) ∈ V) → (⟨(𝐻𝑣), (𝐻𝑢)⟩ ∈ {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)} ↔ ∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)))
2010, 19syl 14 . . . . . . . . 9 ((𝐻 Fn 𝐴 ∧ (𝑣𝐴𝑢𝐴)) → (⟨(𝐻𝑣), (𝐻𝑢)⟩ ∈ {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)} ↔ ∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)))
215, 20sylan 281 . . . . . . . 8 ((𝐻:𝐴1-1𝐵 ∧ (𝑣𝐴𝑢𝐴)) → (⟨(𝐻𝑣), (𝐻𝑢)⟩ ∈ {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)} ↔ ∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)))
22 anass 399 . . . . . . . . . . . . . . 15 ((((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ ((𝐻𝑣) = (𝐻𝑥) ∧ ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦)))
23 f1fveq 5677 . . . . . . . . . . . . . . . . . 18 ((𝐻:𝐴1-1𝐵 ∧ (𝑣𝐴𝑥𝐴)) → ((𝐻𝑣) = (𝐻𝑥) ↔ 𝑣 = 𝑥))
24 equcom 1683 . . . . . . . . . . . . . . . . . 18 (𝑣 = 𝑥𝑥 = 𝑣)
2523, 24syl6bb 195 . . . . . . . . . . . . . . . . 17 ((𝐻:𝐴1-1𝐵 ∧ (𝑣𝐴𝑥𝐴)) → ((𝐻𝑣) = (𝐻𝑥) ↔ 𝑥 = 𝑣))
2625anassrs 398 . . . . . . . . . . . . . . . 16 (((𝐻:𝐴1-1𝐵𝑣𝐴) ∧ 𝑥𝐴) → ((𝐻𝑣) = (𝐻𝑥) ↔ 𝑥 = 𝑣))
2726anbi1d 461 . . . . . . . . . . . . . . 15 (((𝐻:𝐴1-1𝐵𝑣𝐴) ∧ 𝑥𝐴) → (((𝐻𝑣) = (𝐻𝑥) ∧ ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦)) ↔ (𝑥 = 𝑣 ∧ ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦))))
2822, 27syl5bb 191 . . . . . . . . . . . . . 14 (((𝐻:𝐴1-1𝐵𝑣𝐴) ∧ 𝑥𝐴) → ((((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ (𝑥 = 𝑣 ∧ ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦))))
2928rexbidv 2439 . . . . . . . . . . . . 13 (((𝐻:𝐴1-1𝐵𝑣𝐴) ∧ 𝑥𝐴) → (∃𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ ∃𝑦𝐴 (𝑥 = 𝑣 ∧ ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦))))
30 r19.42v 2589 . . . . . . . . . . . . 13 (∃𝑦𝐴 (𝑥 = 𝑣 ∧ ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦)) ↔ (𝑥 = 𝑣 ∧ ∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦)))
3129, 30syl6bb 195 . . . . . . . . . . . 12 (((𝐻:𝐴1-1𝐵𝑣𝐴) ∧ 𝑥𝐴) → (∃𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ (𝑥 = 𝑣 ∧ ∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦))))
3231rexbidva 2435 . . . . . . . . . . 11 ((𝐻:𝐴1-1𝐵𝑣𝐴) → (∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ ∃𝑥𝐴 (𝑥 = 𝑣 ∧ ∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦))))
33 breq1 3936 . . . . . . . . . . . . . . 15 (𝑥 = 𝑣 → (𝑥𝑅𝑦𝑣𝑅𝑦))
3433anbi2d 460 . . . . . . . . . . . . . 14 (𝑥 = 𝑣 → (((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦) ↔ ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑣𝑅𝑦)))
3534rexbidv 2439 . . . . . . . . . . . . 13 (𝑥 = 𝑣 → (∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦) ↔ ∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑣𝑅𝑦)))
3635ceqsrexv 2816 . . . . . . . . . . . 12 (𝑣𝐴 → (∃𝑥𝐴 (𝑥 = 𝑣 ∧ ∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦)) ↔ ∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑣𝑅𝑦)))
3736adantl 275 . . . . . . . . . . 11 ((𝐻:𝐴1-1𝐵𝑣𝐴) → (∃𝑥𝐴 (𝑥 = 𝑣 ∧ ∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑥𝑅𝑦)) ↔ ∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑣𝑅𝑦)))
3832, 37bitrd 187 . . . . . . . . . 10 ((𝐻:𝐴1-1𝐵𝑣𝐴) → (∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ ∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑣𝑅𝑦)))
39 f1fveq 5677 . . . . . . . . . . . . . . 15 ((𝐻:𝐴1-1𝐵 ∧ (𝑢𝐴𝑦𝐴)) → ((𝐻𝑢) = (𝐻𝑦) ↔ 𝑢 = 𝑦))
40 equcom 1683 . . . . . . . . . . . . . . 15 (𝑢 = 𝑦𝑦 = 𝑢)
4139, 40syl6bb 195 . . . . . . . . . . . . . 14 ((𝐻:𝐴1-1𝐵 ∧ (𝑢𝐴𝑦𝐴)) → ((𝐻𝑢) = (𝐻𝑦) ↔ 𝑦 = 𝑢))
4241anassrs 398 . . . . . . . . . . . . 13 (((𝐻:𝐴1-1𝐵𝑢𝐴) ∧ 𝑦𝐴) → ((𝐻𝑢) = (𝐻𝑦) ↔ 𝑦 = 𝑢))
4342anbi1d 461 . . . . . . . . . . . 12 (((𝐻:𝐴1-1𝐵𝑢𝐴) ∧ 𝑦𝐴) → (((𝐻𝑢) = (𝐻𝑦) ∧ 𝑣𝑅𝑦) ↔ (𝑦 = 𝑢𝑣𝑅𝑦)))
4443rexbidva 2435 . . . . . . . . . . 11 ((𝐻:𝐴1-1𝐵𝑢𝐴) → (∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑣𝑅𝑦) ↔ ∃𝑦𝐴 (𝑦 = 𝑢𝑣𝑅𝑦)))
45 breq2 3937 . . . . . . . . . . . . 13 (𝑦 = 𝑢 → (𝑣𝑅𝑦𝑣𝑅𝑢))
4645ceqsrexv 2816 . . . . . . . . . . . 12 (𝑢𝐴 → (∃𝑦𝐴 (𝑦 = 𝑢𝑣𝑅𝑦) ↔ 𝑣𝑅𝑢))
4746adantl 275 . . . . . . . . . . 11 ((𝐻:𝐴1-1𝐵𝑢𝐴) → (∃𝑦𝐴 (𝑦 = 𝑢𝑣𝑅𝑦) ↔ 𝑣𝑅𝑢))
4844, 47bitrd 187 . . . . . . . . . 10 ((𝐻:𝐴1-1𝐵𝑢𝐴) → (∃𝑦𝐴 ((𝐻𝑢) = (𝐻𝑦) ∧ 𝑣𝑅𝑦) ↔ 𝑣𝑅𝑢))
4938, 48sylan9bb 458 . . . . . . . . 9 (((𝐻:𝐴1-1𝐵𝑣𝐴) ∧ (𝐻:𝐴1-1𝐵𝑢𝐴)) → (∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ 𝑣𝑅𝑢))
5049anandis 582 . . . . . . . 8 ((𝐻:𝐴1-1𝐵 ∧ (𝑣𝐴𝑢𝐴)) → (∃𝑥𝐴𝑦𝐴 (((𝐻𝑣) = (𝐻𝑥) ∧ (𝐻𝑢) = (𝐻𝑦)) ∧ 𝑥𝑅𝑦) ↔ 𝑣𝑅𝑢))
5121, 50bitrd 187 . . . . . . 7 ((𝐻:𝐴1-1𝐵 ∧ (𝑣𝐴𝑢𝐴)) → (⟨(𝐻𝑣), (𝐻𝑢)⟩ ∈ {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)} ↔ 𝑣𝑅𝑢))
524, 51sylan9bbr 459 . . . . . 6 (((𝐻:𝐴1-1𝐵 ∧ (𝑣𝐴𝑢𝐴)) ∧ 𝑆 = {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)}) → (⟨(𝐻𝑣), (𝐻𝑢)⟩ ∈ 𝑆𝑣𝑅𝑢))
5352an32s 558 . . . . 5 (((𝐻:𝐴1-1𝐵𝑆 = {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)}) ∧ (𝑣𝐴𝑢𝐴)) → (⟨(𝐻𝑣), (𝐻𝑢)⟩ ∈ 𝑆𝑣𝑅𝑢))
543, 53syl5rbb 192 . . . 4 (((𝐻:𝐴1-1𝐵𝑆 = {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)}) ∧ (𝑣𝐴𝑢𝐴)) → (𝑣𝑅𝑢 ↔ (𝐻𝑣)𝑆(𝐻𝑢)))
5554ralrimivva 2515 . . 3 ((𝐻:𝐴1-1𝐵𝑆 = {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)}) → ∀𝑣𝐴𝑢𝐴 (𝑣𝑅𝑢 ↔ (𝐻𝑣)𝑆(𝐻𝑢)))
562, 55sylan 281 . 2 ((𝐻:𝐴1-1-onto𝐵𝑆 = {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)}) → ∀𝑣𝐴𝑢𝐴 (𝑣𝑅𝑢 ↔ (𝐻𝑣)𝑆(𝐻𝑢)))
57 df-isom 5136 . 2 (𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵) ↔ (𝐻:𝐴1-1-onto𝐵 ∧ ∀𝑣𝐴𝑢𝐴 (𝑣𝑅𝑢 ↔ (𝐻𝑣)𝑆(𝐻𝑢))))
581, 56, 57sylanbrc 414 1 ((𝐻:𝐴1-1-onto𝐵𝑆 = {⟨𝑧, 𝑤⟩ ∣ ∃𝑥𝐴𝑦𝐴 ((𝑧 = (𝐻𝑥) ∧ 𝑤 = (𝐻𝑦)) ∧ 𝑥𝑅𝑦)}) → 𝐻 Isom 𝑅, 𝑆 (𝐴, 𝐵))
 Colors of variables: wff set class Syntax hints:   → wi 4   ∧ wa 103   ↔ wb 104   = wceq 1332   ∈ wcel 1481  ∀wral 2417  ∃wrex 2418  Vcvv 2687  ⟨cop 3531   class class class wbr 3933  {copab 3992   Fn wfn 5122  –1-1→wf1 5124  –1-1-onto→wf1o 5126  ‘cfv 5127   Isom wiso 5128 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4050  ax-pow 4102  ax-pr 4135 This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ral 2422  df-rex 2423  df-v 2689  df-sbc 2911  df-un 3076  df-in 3078  df-ss 3085  df-pw 3513  df-sn 3534  df-pr 3535  df-op 3537  df-uni 3741  df-br 3934  df-opab 3994  df-id 4219  df-xp 4549  df-rel 4550  df-cnv 4551  df-co 4552  df-dm 4553  df-iota 5092  df-fun 5129  df-fn 5130  df-f 5131  df-f1 5132  df-f1o 5134  df-fv 5135  df-isom 5136 This theorem is referenced by:  f1oiso2  5732
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