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Theorem isinv 16420

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 16419	. . . 4 ⊢ (𝜑 → (𝑋𝑁𝑌) = ((𝑋𝑆𝑌) ∩ ^◡(𝑌𝑆𝑋)))
8	7	breqd 4664	. . 3 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ 𝐹((𝑋𝑆𝑌) ∩ ^◡(𝑌𝑆𝑋))𝐺))
9		brin 4704	. . 3 ⊢ (𝐹((𝑋𝑆𝑌) ∩ ^◡(𝑌𝑆𝑋))𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐹^◡(𝑌𝑆𝑋)𝐺))
10	8, 9	syl6bb 276	. 2 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐹^◡(𝑌𝑆𝑋)𝐺)))
11		eqid 2622	. . . . . 6 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶)
12		eqid 2622	. . . . . 6 ⊢ (comp‘𝐶) = (comp‘𝐶)
13		eqid 2622	. . . . . 6 ⊢ (Id‘𝐶) = (Id‘𝐶)
14	1, 11, 12, 13, 6, 3, 5, 4	sectss 16412	. . . . 5 ⊢ (𝜑 → (𝑌𝑆𝑋) ⊆ ((𝑌(Hom ‘𝐶)𝑋) × (𝑋(Hom ‘𝐶)𝑌)))
15		relxp 5227	. . . . 5 ⊢ Rel ((𝑌(Hom ‘𝐶)𝑋) × (𝑋(Hom ‘𝐶)𝑌))
16		relss 5206	. . . . 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 5504	. . . 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 740	. 2 ⊢ (𝜑 → ((𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐹^◡(𝑌𝑆𝑋)𝐺) ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐺(𝑌𝑆𝑋)𝐹)))
21	10, 20	bitrd 268	1 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐺(𝑌𝑆𝑋)𝐹)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 = wceq 1483 ∈ wcel 1990 ∩ cin 3573 ⊆ wss 3574 class class class wbr 4653 × cxp 5112 ^◡ccnv 5113 Rel wrel 5119 ‘cfv 5888 (class class class)co 6650 Basecbs 15857 Hom chom 15952 compcco 15953 Catccat 16325 Idccid 16326 Sectcsect 16404 Invcinv 16405

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-1st 7168 df-2nd 7169 df-sect 16407 df-inv 16408

This theorem is referenced by: invsym 16422 invfun 16424 invco 16431 inveq 16434 monsect 16443 invid 16447 invcoisoid 16452 isocoinvid 16453 cicref 16461 funcinv 16533 fthinv 16586 fucinv 16633 invfuc 16634 2initoinv 16660 2termoinv 16667 setcinv 16740 catcisolem 16756 catciso 16757 rngcinv 41981 rngcinvALTV 41993 ringcinv 42032 ringcinvALTV 42056

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