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Theorem gimcnv 19328
Description: The converse of a group isomorphism is a group isomorphism. (Contributed by Stefan O'Rear, 25-Jan-2015.) (Revised by Mario Carneiro, 6-May-2015.)
Assertion
Ref Expression
gimcnv (𝐹 ∈ (𝑆 GrpIso 𝑇) → 𝐹 ∈ (𝑇 GrpIso 𝑆))

Proof of Theorem gimcnv
StepHypRef Expression
1 eqid 2765 . . . . . 6 (Base‘𝑆) = (Base‘𝑆)
2 eqid 2765 . . . . . 6 (Base‘𝑇) = (Base‘𝑇)
31, 2ghmf 19281 . . . . 5 (𝐹 ∈ (𝑆 GrpHom 𝑇) → 𝐹:(Base‘𝑆)⟶(Base‘𝑇))
4 frel 6701 . . . . . 6 (𝐹:(Base‘𝑆)⟶(Base‘𝑇) → Rel 𝐹)
5 dfrel2 6179 . . . . . 6 (Rel 𝐹𝐹 = 𝐹)
64, 5sylib 221 . . . . 5 (𝐹:(Base‘𝑆)⟶(Base‘𝑇) → 𝐹 = 𝐹)
73, 6syl 18 . . . 4 (𝐹 ∈ (𝑆 GrpHom 𝑇) → 𝐹 = 𝐹)
8 id 23 . . . 4 (𝐹 ∈ (𝑆 GrpHom 𝑇) → 𝐹 ∈ (𝑆 GrpHom 𝑇))
97, 8eqeltrd 2865 . . 3 (𝐹 ∈ (𝑆 GrpHom 𝑇) → 𝐹 ∈ (𝑆 GrpHom 𝑇))
109anim1ci 627 . 2 ((𝐹 ∈ (𝑆 GrpHom 𝑇) ∧ 𝐹 ∈ (𝑇 GrpHom 𝑆)) → (𝐹 ∈ (𝑇 GrpHom 𝑆) ∧ 𝐹 ∈ (𝑆 GrpHom 𝑇)))
11 isgim2 19326 . 2 (𝐹 ∈ (𝑆 GrpIso 𝑇) ↔ (𝐹 ∈ (𝑆 GrpHom 𝑇) ∧ 𝐹 ∈ (𝑇 GrpHom 𝑆)))
12 isgim2 19326 . 2 (𝐹 ∈ (𝑇 GrpIso 𝑆) ↔ (𝐹 ∈ (𝑇 GrpHom 𝑆) ∧ 𝐹 ∈ (𝑆 GrpHom 𝑇)))
1310, 11, 123imtr4i 295 1 (𝐹 ∈ (𝑆 GrpIso 𝑇) → 𝐹 ∈ (𝑇 GrpIso 𝑆))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1563  wcel 2145  ccnv 5651  Rel wrel 5657  wf 6521  cfv 6525  (class class class)co 7400  Basecbs 17259   GrpHom cghm 19274   GrpIso cgim 19318
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-sep 5251  ax-nul 5261  ax-pow 5327  ax-pr 5395  ax-un 7722
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3080  df-rex 3090  df-rab 3418  df-v 3459  df-sbc 3748  df-csb 3856  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-pw 4560  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-iun 4954  df-br 5106  df-opab 5168  df-mpt 5187  df-id 5547  df-xp 5658  df-rel 5659  df-cnv 5660  df-co 5661  df-dm 5662  df-rn 5663  df-res 5664  df-ima 5665  df-iota 6481  df-fun 6527  df-fn 6528  df-f 6529  df-f1 6530  df-fo 6531  df-f1o 6532  df-fv 6533  df-ov 7403  df-oprab 7404  df-mpo 7405  df-1st 7974  df-2nd 7975  df-map 8814  df-mgm 18688  df-sgrp 18767  df-mnd 18783  df-grp 18993  df-ghm 19275  df-gim 19320
This theorem is referenced by:  gicsym  19336  reloggim  26722  abliso  33268
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