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Theorem isinv2 49379
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 49377 . . 3 (𝐹(𝑋𝑁𝑌)𝐺𝐶 ∈ Cat)
4 eqid 2737 . . . 4 (Base‘𝐶) = (Base‘𝐶)
51, 2, 4invrcl2 49378 . . 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 49375 . . 3 ((𝐹(𝑋𝑆𝑌)𝐺𝐺(𝑌𝑆𝑋)𝐹) → 𝐶 ∈ Cat)
107, 8, 4sectrcl2 49376 . . 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 17696 . 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 5100  cfv 6500  (class class class)co 7368  Basecbs 17148  Catccat 17599  Sectcsect 17680  Invcinv 17681
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 5226  ax-sep 5243  ax-nul 5253  ax-pow 5312  ax-pr 5379  ax-un 7690
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 3353  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-iun 4950  df-br 5101  df-opab 5163  df-mpt 5182  df-id 5527  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-ima 5645  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-f1 6505  df-fo 6506  df-f1o 6507  df-fv 6508  df-ov 7371  df-oprab 7372  df-mpo 7373  df-1st 7943  df-2nd 7944  df-sect 17683  df-inv 17684
This theorem is referenced by:  catcinv  49752
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