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Theorem isinv2 49151
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 49149 . . 3 (𝐹(𝑋𝑁𝑌)𝐺𝐶 ∈ Cat)
4 eqid 2733 . . . 4 (Base‘𝐶) = (Base‘𝐶)
51, 2, 4invrcl2 49150 . . 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 49147 . . 3 ((𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹) → 𝐶 ∈ Cat)
107, 8, 4sectrcl2 49148 . . 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 17669 . 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 1541  wcel 2113   class class class wbr 5093  cfv 6486  (class class class)co 7352  Basecbs 17122  Catccat 17572  Sectcsect 17653  Invcinv 17654
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2705  ax-rep 5219  ax-sep 5236  ax-nul 5246  ax-pow 5305  ax-pr 5372  ax-un 7674
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-nfc 2882  df-ne 2930  df-ral 3049  df-rex 3058  df-reu 3348  df-rab 3397  df-v 3439  df-sbc 3738  df-csb 3847  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4283  df-if 4475  df-pw 4551  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-iun 4943  df-br 5094  df-opab 5156  df-mpt 5175  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  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 7355  df-oprab 7356  df-mpo 7357  df-1st 7927  df-2nd 7928  df-sect 17656  df-inv 17657
This theorem is referenced by:  catcinv  49524
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