Theorem funciso 16534

Description: The image of an isomorphism under a functor is an isomorphism. Proposition 3.21 of [Adamek] p. 32. (Contributed by Mario Carneiro, 3-Jan-2017.)

Hypotheses

Ref	Expression
funciso.b	⊢ 𝐵 = (Base‘𝐷)
funciso.s	⊢ 𝐼 = (Iso‘𝐷)
funciso.t	⊢ 𝐽 = (Iso‘𝐸)
funciso.f	⊢ (𝜑 → 𝐹(𝐷 Func 𝐸)𝐺)
funciso.x	⊢ (𝜑 → 𝑋 ∈ 𝐵)
funciso.y	⊢ (𝜑 → 𝑌 ∈ 𝐵)
funciso.m	⊢ (𝜑 → 𝑀 ∈ (𝑋𝐼𝑌))

Assertion

Ref	Expression
funciso	⊢ (𝜑 → ((𝑋𝐺𝑌)‘𝑀) ∈ ((𝐹‘𝑋)𝐽(𝐹‘𝑌)))

Proof of Theorem funciso

Step	Hyp	Ref	Expression
1		eqid 2622	. 2 ⊢ (Base‘𝐸) = (Base‘𝐸)
2		eqid 2622	. 2 ⊢ (Inv‘𝐸) = (Inv‘𝐸)
3		funciso.f	. . . . 5 ⊢ (𝜑 → 𝐹(𝐷 Func 𝐸)𝐺)
4		df-br 4654	. . . . 5 ⊢ (𝐹(𝐷 Func 𝐸)𝐺 ↔ ⟨𝐹, 𝐺⟩ ∈ (𝐷 Func 𝐸))
5	3, 4	sylib 208	. . . 4 ⊢ (𝜑 → ⟨𝐹, 𝐺⟩ ∈ (𝐷 Func 𝐸))
6		funcrcl 16523	. . . 4 ⊢ (⟨𝐹, 𝐺⟩ ∈ (𝐷 Func 𝐸) → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat))
7	5, 6	syl 17	. . 3 ⊢ (𝜑 → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat))
8	7	simprd 479	. 2 ⊢ (𝜑 → 𝐸 ∈ Cat)
9		funciso.b	. . . 4 ⊢ 𝐵 = (Base‘𝐷)
10	9, 1, 3	funcf1 16526	. . 3 ⊢ (𝜑 → 𝐹:𝐵⟶(Base‘𝐸))
11		funciso.x	. . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
12	10, 11	ffvelrnd 6360	. 2 ⊢ (𝜑 → (𝐹‘𝑋) ∈ (Base‘𝐸))
13		funciso.y	. . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
14	10, 13	ffvelrnd 6360	. 2 ⊢ (𝜑 → (𝐹‘𝑌) ∈ (Base‘𝐸))
15		funciso.t	. 2 ⊢ 𝐽 = (Iso‘𝐸)
16		eqid 2622	. . 3 ⊢ (Inv‘𝐷) = (Inv‘𝐷)
17		funciso.m	. . . . 5 ⊢ (𝜑 → 𝑀 ∈ (𝑋𝐼𝑌))
18	7	simpld 475	. . . . . 6 ⊢ (𝜑 → 𝐷 ∈ Cat)
19		funciso.s	. . . . . 6 ⊢ 𝐼 = (Iso‘𝐷)
20	9, 16, 18, 11, 13, 19	isoval 16425	. . . . 5 ⊢ (𝜑 → (𝑋𝐼𝑌) = dom (𝑋(Inv‘𝐷)𝑌))
21	17, 20	eleqtrd 2703	. . . 4 ⊢ (𝜑 → 𝑀 ∈ dom (𝑋(Inv‘𝐷)𝑌))
22	9, 16, 18, 11, 13	invfun 16424	. . . . 5 ⊢ (𝜑 → Fun (𝑋(Inv‘𝐷)𝑌))
23		funfvbrb 6330	. . . . 5 ⊢ (Fun (𝑋(Inv‘𝐷)𝑌) → (𝑀 ∈ dom (𝑋(Inv‘𝐷)𝑌) ↔ 𝑀(𝑋(Inv‘𝐷)𝑌)((𝑋(Inv‘𝐷)𝑌)‘𝑀)))
24	22, 23	syl 17	. . . 4 ⊢ (𝜑 → (𝑀 ∈ dom (𝑋(Inv‘𝐷)𝑌) ↔ 𝑀(𝑋(Inv‘𝐷)𝑌)((𝑋(Inv‘𝐷)𝑌)‘𝑀)))
25	21, 24	mpbid 222	. . 3 ⊢ (𝜑 → 𝑀(𝑋(Inv‘𝐷)𝑌)((𝑋(Inv‘𝐷)𝑌)‘𝑀))
26	9, 16, 2, 3, 11, 13, 25	funcinv 16533	. 2 ⊢ (𝜑 → ((𝑋𝐺𝑌)‘𝑀)((𝐹‘𝑋)(Inv‘𝐸)(𝐹‘𝑌))((𝑌𝐺𝑋)‘((𝑋(Inv‘𝐷)𝑌)‘𝑀)))
27	1, 2, 8, 12, 14, 15, 26	inviso1 16426	1 ⊢ (𝜑 → ((𝑋𝐺𝑌)‘𝑀) ∈ ((𝐹‘𝑋)𝐽(𝐹‘𝑌)))

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   = wceq 1483   ∈ wcel 1990  ⟨cop 4183   class class class wbr 4653  dom cdm 5114  Fun wfun 5882  ‘cfv 5888  (class class class)co 6650  Basecbs 15857  Catccat 16325  Invcinv 16405  Isociso 16406   Func cfunc 16514

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-rmo 2920  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-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-1st 7168  df-2nd 7169  df-map 7859  df-ixp 7909  df-cat 16329  df-cid 16330  df-sect 16407  df-inv 16408  df-iso 16409  df-func 16518

This theorem is referenced by:  ffthiso  16589