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Theorem isinv 17032

Description: Value of the inverse relation. (Contributed by Mario Carneiro, 2-Jan-2017.)

**Hypotheses**
Ref	Expression
invfval.b	⊢ 𝐵 = (Base‘𝐶)
invfval.n	⊢ 𝑁 = (Inv‘𝐶)
invfval.c	⊢ (𝜑 → 𝐶 ∈ Cat)
invfval.x	⊢ (𝜑 → 𝑋 ∈ 𝐵)
invfval.y	⊢ (𝜑 → 𝑌 ∈ 𝐵)
invfval.s	⊢ 𝑆 = (Sect‘𝐶)

**Assertion**
Ref	Expression
isinv	⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐺(𝑌𝑆𝑋)𝐹)))

**Proof of Theorem isinv**
Step	Hyp	Ref	Expression
1		invfval.b	. . . . 5 ⊢ 𝐵 = (Base‘𝐶)
2		invfval.n	. . . . 5 ⊢ 𝑁 = (Inv‘𝐶)
3		invfval.c	. . . . 5 ⊢ (𝜑 → 𝐶 ∈ Cat)
4		invfval.x	. . . . 5 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
5		invfval.y	. . . . 5 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
6		invfval.s	. . . . 5 ⊢ 𝑆 = (Sect‘𝐶)
7	1, 2, 3, 4, 5, 6	invfval 17031	. . . 4 ⊢ (𝜑 → (𝑋𝑁𝑌) = ((𝑋𝑆𝑌) ∩ ^◡(𝑌𝑆𝑋)))
8	7	breqd 5079	. . 3 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ 𝐹((𝑋𝑆𝑌) ∩ ^◡(𝑌𝑆𝑋))𝐺))
9		brin 5120	. . 3 ⊢ (𝐹((𝑋𝑆𝑌) ∩ ^◡(𝑌𝑆𝑋))𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐹^◡(𝑌𝑆𝑋)𝐺))
10	8, 9	syl6bb 289	. 2 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐹^◡(𝑌𝑆𝑋)𝐺)))
11		eqid 2823	. . . . . 6 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶)
12		eqid 2823	. . . . . 6 ⊢ (comp‘𝐶) = (comp‘𝐶)
13		eqid 2823	. . . . . 6 ⊢ (Id‘𝐶) = (Id‘𝐶)
14	1, 11, 12, 13, 6, 3, 5, 4	sectss 17024	. . . . 5 ⊢ (𝜑 → (𝑌𝑆𝑋) ⊆ ((𝑌(Hom ‘𝐶)𝑋) × (𝑋(Hom ‘𝐶)𝑌)))
15		relxp 5575	. . . . 5 ⊢ Rel ((𝑌(Hom ‘𝐶)𝑋) × (𝑋(Hom ‘𝐶)𝑌))
16		relss 5658	. . . . 5 ⊢ ((𝑌𝑆𝑋) ⊆ ((𝑌(Hom ‘𝐶)𝑋) × (𝑋(Hom ‘𝐶)𝑌)) → (Rel ((𝑌(Hom ‘𝐶)𝑋) × (𝑋(Hom ‘𝐶)𝑌)) → Rel (𝑌𝑆𝑋)))
17	14, 15, 16	mpisyl 21	. . . 4 ⊢ (𝜑 → Rel (𝑌𝑆𝑋))
18		relbrcnvg 5970	. . . 4 ⊢ (Rel (𝑌𝑆𝑋) → (𝐹^◡(𝑌𝑆𝑋)𝐺 ↔ 𝐺(𝑌𝑆𝑋)𝐹))
19	17, 18	syl 17	. . 3 ⊢ (𝜑 → (𝐹^◡(𝑌𝑆𝑋)𝐺 ↔ 𝐺(𝑌𝑆𝑋)𝐹))
20	19	anbi2d 630	. 2 ⊢ (𝜑 → ((𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐹^◡(𝑌𝑆𝑋)𝐺) ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐺(𝑌𝑆𝑋)𝐹)))
21	10, 20	bitrd 281	1 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐺(𝑌𝑆𝑋)𝐹)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 ∩ cin 3937 ⊆ wss 3938 class class class wbr 5068 × cxp 5555 ^◡ccnv 5556 Rel wrel 5562 ‘cfv 6357 (class class class)co 7158 Basecbs 16485 Hom chom 16578 compcco 16579 Catccat 16937 Idccid 16938 Sectcsect 17016 Invcinv 17017

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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-ral 3145 df-rex 3146 df-reu 3147 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-ov 7161 df-oprab 7162 df-mpo 7163 df-1st 7691 df-2nd 7692 df-sect 17019 df-inv 17020

This theorem is referenced by: invsym 17034 invfun 17036 invco 17043 inveq 17046 monsect 17055 invid 17059 invcoisoid 17064 isocoinvid 17065 funcinv 17145 fthinv 17198 fucinv 17245 invfuc 17246 2initoinv 17272 2termoinv 17279 setcinv 17352 catcisolem 17368 catciso 17369 rngcinv 44259 rngcinvALTV 44271 ringcinv 44310 ringcinvALTV 44334

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