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Theorem isoresbr 5831
Description: A consequence of isomorphism on two relations for a function's restriction. (Contributed by Jim Kingdon, 11-Jan-2019.)
Assertion
Ref Expression
isoresbr ((𝐹𝐴) Isom 𝑅, 𝑆 (𝐴, (𝐹𝐴)) → ∀𝑥𝐴𝑦𝐴 (𝑥𝑅𝑦 → (𝐹𝑥)𝑆(𝐹𝑦)))
Distinct variable groups:   𝑥,𝑦,𝐴   𝑥,𝐹,𝑦   𝑥,𝑅,𝑦   𝑥,𝑆,𝑦

Proof of Theorem isoresbr
StepHypRef Expression
1 isorel 5830 . . . 4 (((𝐹𝐴) Isom 𝑅, 𝑆 (𝐴, (𝐹𝐴)) ∧ (𝑥𝐴𝑦𝐴)) → (𝑥𝑅𝑦 ↔ ((𝐹𝐴)‘𝑥)𝑆((𝐹𝐴)‘𝑦)))
2 fvres 5558 . . . . . 6 (𝑥𝐴 → ((𝐹𝐴)‘𝑥) = (𝐹𝑥))
3 fvres 5558 . . . . . 6 (𝑦𝐴 → ((𝐹𝐴)‘𝑦) = (𝐹𝑦))
42, 3breqan12d 4034 . . . . 5 ((𝑥𝐴𝑦𝐴) → (((𝐹𝐴)‘𝑥)𝑆((𝐹𝐴)‘𝑦) ↔ (𝐹𝑥)𝑆(𝐹𝑦)))
54adantl 277 . . . 4 (((𝐹𝐴) Isom 𝑅, 𝑆 (𝐴, (𝐹𝐴)) ∧ (𝑥𝐴𝑦𝐴)) → (((𝐹𝐴)‘𝑥)𝑆((𝐹𝐴)‘𝑦) ↔ (𝐹𝑥)𝑆(𝐹𝑦)))
61, 5bitrd 188 . . 3 (((𝐹𝐴) Isom 𝑅, 𝑆 (𝐴, (𝐹𝐴)) ∧ (𝑥𝐴𝑦𝐴)) → (𝑥𝑅𝑦 ↔ (𝐹𝑥)𝑆(𝐹𝑦)))
76biimpd 144 . 2 (((𝐹𝐴) Isom 𝑅, 𝑆 (𝐴, (𝐹𝐴)) ∧ (𝑥𝐴𝑦𝐴)) → (𝑥𝑅𝑦 → (𝐹𝑥)𝑆(𝐹𝑦)))
87ralrimivva 2572 1 ((𝐹𝐴) Isom 𝑅, 𝑆 (𝐴, (𝐹𝐴)) → ∀𝑥𝐴𝑦𝐴 (𝑥𝑅𝑦 → (𝐹𝑥)𝑆(𝐹𝑦)))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105  wcel 2160  wral 2468   class class class wbr 4018  cres 4646  cima 4647  cfv 5235   Isom wiso 5236
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 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-14 2163  ax-ext 2171  ax-sep 4136  ax-pow 4192  ax-pr 4227
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2176  df-cleq 2182  df-clel 2185  df-nfc 2321  df-ral 2473  df-rex 2474  df-v 2754  df-un 3148  df-in 3150  df-ss 3157  df-pw 3592  df-sn 3613  df-pr 3614  df-op 3616  df-uni 3825  df-br 4019  df-opab 4080  df-xp 4650  df-res 4656  df-iota 5196  df-fv 5243  df-isom 5244
This theorem is referenced by: (None)
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