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Theorem isinv2 49513
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 49511 . . 3 (𝐹(𝑋𝑁𝑌)𝐺𝐶 ∈ Cat)
4 eqid 2737 . . . 4 (Base‘𝐶) = (Base‘𝐶)
51, 2, 4invrcl2 49512 . . 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 49509 . . 3 ((𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹) → 𝐶 ∈ Cat)
107, 8, 4sectrcl2 49510 . . 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 771 . . 3 ((𝐶 ∈ Cat ∧ (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶))) → 𝑋 ∈ (Base‘𝐶))
14 simprr 773 . . 3 ((𝐶 ∈ Cat ∧ (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶))) → 𝑌 ∈ (Base‘𝐶))
154, 1, 12, 13, 14, 7isinv 17718 . 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 1542  wcel 2114   class class class wbr 5086  cfv 6492  (class class class)co 7360  Basecbs 17170  Catccat 17621  Sectcsect 17702  Invcinv 17703
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 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5212  ax-sep 5231  ax-nul 5241  ax-pow 5302  ax-pr 5370  ax-un 7682
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-reu 3344  df-rab 3391  df-v 3432  df-sbc 3730  df-csb 3839  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4275  df-if 4468  df-pw 4544  df-sn 4569  df-pr 4571  df-op 4575  df-uni 4852  df-iun 4936  df-br 5087  df-opab 5149  df-mpt 5168  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-ov 7363  df-oprab 7364  df-mpo 7365  df-1st 7935  df-2nd 7936  df-sect 17705  df-inv 17706
This theorem is referenced by:  catcinv  49886
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