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Theorem isinv2 49012
Description: The property "𝐹 is an inverse of 𝐺". (Contributed by Zhi Wang, 14-Nov-2025.)
Hypotheses
Ref Expression
isinv2.n 𝑁 = (Inv‘𝐶)
isinv2.s 𝑆 = (Sect‘𝐶)
Assertion
Ref Expression
isinv2 (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹))

Proof of Theorem isinv2
StepHypRef Expression
1 isinv2.n . . . 4 𝑁 = (Inv‘𝐶)
2 id 22 . . . 4 (𝐹(𝑋𝑁𝑌)𝐺𝐹(𝑋𝑁𝑌)𝐺)
31, 2invrcl 49010 . . 3 (𝐹(𝑋𝑁𝑌)𝐺𝐶 ∈ Cat)
4 eqid 2729 . . . 4 (Base‘𝐶) = (Base‘𝐶)
51, 2, 4invrcl2 49011 . . 3 (𝐹(𝑋𝑁𝑌)𝐺 → (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶)))
63, 5jca 511 . 2 (𝐹(𝑋𝑁𝑌)𝐺 → (𝐶 ∈ Cat ∧ (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶))))
7 isinv2.s . . . 4 𝑆 = (Sect‘𝐶)
8 simpl 482 . . . 4 ((𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹) → 𝐹(𝑋𝑆𝑌)𝐺)
97, 8sectrcl 49008 . . 3 ((𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹) → 𝐶 ∈ Cat)
107, 8, 4sectrcl2 49009 . . 3 ((𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹) → (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶)))
119, 10jca 511 . 2 ((𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹) → (𝐶 ∈ Cat ∧ (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶))))
12 simpl 482 . . 3 ((𝐶 ∈ Cat ∧ (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶))) → 𝐶 ∈ Cat)
13 simprl 770 . . 3 ((𝐶 ∈ Cat ∧ (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶))) → 𝑋 ∈ (Base‘𝐶))
14 simprr 772 . . 3 ((𝐶 ∈ Cat ∧ (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶))) → 𝑌 ∈ (Base‘𝐶))
154, 1, 12, 13, 14, 7isinv 17685 . 2 ((𝐶 ∈ Cat ∧ (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶))) → (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹)))
166, 11, 15pm5.21nii 378 1 (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹))
Colors of variables: wff setvar class
Syntax hints:  wb 206  wa 395   = wceq 1540  wcel 2109   class class class wbr 5095  cfv 6486  (class class class)co 7353  Basecbs 17138  Catccat 17588  Sectcsect 17669  Invcinv 17670
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5221  ax-sep 5238  ax-nul 5248  ax-pow 5307  ax-pr 5374  ax-un 7675
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-reu 3346  df-rab 3397  df-v 3440  df-sbc 3745  df-csb 3854  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4479  df-pw 4555  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4862  df-iun 4946  df-br 5096  df-opab 5158  df-mpt 5177  df-id 5518  df-xp 5629  df-rel 5630  df-cnv 5631  df-co 5632  df-dm 5633  df-rn 5634  df-res 5635  df-ima 5636  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-ov 7356  df-oprab 7357  df-mpo 7358  df-1st 7931  df-2nd 7932  df-sect 17672  df-inv 17673
This theorem is referenced by:  catcinv  49385
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