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Theorem sectco 16637
Description: Composition of two sections. (Contributed by Mario Carneiro, 2-Jan-2017.)
Hypotheses
Ref Expression
sectco.b 𝐵 = (Base‘𝐶)
sectco.o · = (comp‘𝐶)
sectco.s 𝑆 = (Sect‘𝐶)
sectco.c (𝜑𝐶 ∈ Cat)
sectco.x (𝜑𝑋𝐵)
sectco.y (𝜑𝑌𝐵)
sectco.z (𝜑𝑍𝐵)
sectco.1 (𝜑𝐹(𝑋𝑆𝑌)𝐺)
sectco.2 (𝜑𝐻(𝑌𝑆𝑍)𝐾)
Assertion
Ref Expression
sectco (𝜑 → (𝐻(⟨𝑋, 𝑌· 𝑍)𝐹)(𝑋𝑆𝑍)(𝐺(⟨𝑍, 𝑌· 𝑋)𝐾))

Proof of Theorem sectco
StepHypRef Expression
1 sectco.b . . . 4 𝐵 = (Base‘𝐶)
2 eqid 2760 . . . 4 (Hom ‘𝐶) = (Hom ‘𝐶)
3 sectco.o . . . 4 · = (comp‘𝐶)
4 sectco.c . . . 4 (𝜑𝐶 ∈ Cat)
5 sectco.x . . . 4 (𝜑𝑋𝐵)
6 sectco.z . . . 4 (𝜑𝑍𝐵)
7 sectco.y . . . 4 (𝜑𝑌𝐵)
8 sectco.1 . . . . . . 7 (𝜑𝐹(𝑋𝑆𝑌)𝐺)
9 eqid 2760 . . . . . . . 8 (Id‘𝐶) = (Id‘𝐶)
10 sectco.s . . . . . . . 8 𝑆 = (Sect‘𝐶)
111, 2, 3, 9, 10, 4, 5, 7issect 16634 . . . . . . 7 (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ (𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌) ∧ 𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋) ∧ (𝐺(⟨𝑋, 𝑌· 𝑋)𝐹) = ((Id‘𝐶)‘𝑋))))
128, 11mpbid 222 . . . . . 6 (𝜑 → (𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌) ∧ 𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋) ∧ (𝐺(⟨𝑋, 𝑌· 𝑋)𝐹) = ((Id‘𝐶)‘𝑋)))
1312simp1d 1137 . . . . 5 (𝜑𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌))
14 sectco.2 . . . . . . 7 (𝜑𝐻(𝑌𝑆𝑍)𝐾)
151, 2, 3, 9, 10, 4, 7, 6issect 16634 . . . . . . 7 (𝜑 → (𝐻(𝑌𝑆𝑍)𝐾 ↔ (𝐻 ∈ (𝑌(Hom ‘𝐶)𝑍) ∧ 𝐾 ∈ (𝑍(Hom ‘𝐶)𝑌) ∧ (𝐾(⟨𝑌, 𝑍· 𝑌)𝐻) = ((Id‘𝐶)‘𝑌))))
1614, 15mpbid 222 . . . . . 6 (𝜑 → (𝐻 ∈ (𝑌(Hom ‘𝐶)𝑍) ∧ 𝐾 ∈ (𝑍(Hom ‘𝐶)𝑌) ∧ (𝐾(⟨𝑌, 𝑍· 𝑌)𝐻) = ((Id‘𝐶)‘𝑌)))
1716simp1d 1137 . . . . 5 (𝜑𝐻 ∈ (𝑌(Hom ‘𝐶)𝑍))
181, 2, 3, 4, 5, 7, 6, 13, 17catcocl 16567 . . . 4 (𝜑 → (𝐻(⟨𝑋, 𝑌· 𝑍)𝐹) ∈ (𝑋(Hom ‘𝐶)𝑍))
1916simp2d 1138 . . . 4 (𝜑𝐾 ∈ (𝑍(Hom ‘𝐶)𝑌))
2012simp2d 1138 . . . 4 (𝜑𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋))
211, 2, 3, 4, 5, 6, 7, 18, 19, 5, 20catass 16568 . . 3 (𝜑 → ((𝐺(⟨𝑍, 𝑌· 𝑋)𝐾)(⟨𝑋, 𝑍· 𝑋)(𝐻(⟨𝑋, 𝑌· 𝑍)𝐹)) = (𝐺(⟨𝑋, 𝑌· 𝑋)(𝐾(⟨𝑋, 𝑍· 𝑌)(𝐻(⟨𝑋, 𝑌· 𝑍)𝐹))))
2216simp3d 1139 . . . . . 6 (𝜑 → (𝐾(⟨𝑌, 𝑍· 𝑌)𝐻) = ((Id‘𝐶)‘𝑌))
2322oveq1d 6829 . . . . 5 (𝜑 → ((𝐾(⟨𝑌, 𝑍· 𝑌)𝐻)(⟨𝑋, 𝑌· 𝑌)𝐹) = (((Id‘𝐶)‘𝑌)(⟨𝑋, 𝑌· 𝑌)𝐹))
241, 2, 3, 4, 5, 7, 6, 13, 17, 7, 19catass 16568 . . . . 5 (𝜑 → ((𝐾(⟨𝑌, 𝑍· 𝑌)𝐻)(⟨𝑋, 𝑌· 𝑌)𝐹) = (𝐾(⟨𝑋, 𝑍· 𝑌)(𝐻(⟨𝑋, 𝑌· 𝑍)𝐹)))
251, 2, 9, 4, 5, 3, 7, 13catlid 16565 . . . . 5 (𝜑 → (((Id‘𝐶)‘𝑌)(⟨𝑋, 𝑌· 𝑌)𝐹) = 𝐹)
2623, 24, 253eqtr3d 2802 . . . 4 (𝜑 → (𝐾(⟨𝑋, 𝑍· 𝑌)(𝐻(⟨𝑋, 𝑌· 𝑍)𝐹)) = 𝐹)
2726oveq2d 6830 . . 3 (𝜑 → (𝐺(⟨𝑋, 𝑌· 𝑋)(𝐾(⟨𝑋, 𝑍· 𝑌)(𝐻(⟨𝑋, 𝑌· 𝑍)𝐹))) = (𝐺(⟨𝑋, 𝑌· 𝑋)𝐹))
2812simp3d 1139 . . 3 (𝜑 → (𝐺(⟨𝑋, 𝑌· 𝑋)𝐹) = ((Id‘𝐶)‘𝑋))
2921, 27, 283eqtrd 2798 . 2 (𝜑 → ((𝐺(⟨𝑍, 𝑌· 𝑋)𝐾)(⟨𝑋, 𝑍· 𝑋)(𝐻(⟨𝑋, 𝑌· 𝑍)𝐹)) = ((Id‘𝐶)‘𝑋))
301, 2, 3, 4, 6, 7, 5, 19, 20catcocl 16567 . . 3 (𝜑 → (𝐺(⟨𝑍, 𝑌· 𝑋)𝐾) ∈ (𝑍(Hom ‘𝐶)𝑋))
311, 2, 3, 9, 10, 4, 5, 6, 18, 30issect2 16635 . 2 (𝜑 → ((𝐻(⟨𝑋, 𝑌· 𝑍)𝐹)(𝑋𝑆𝑍)(𝐺(⟨𝑍, 𝑌· 𝑋)𝐾) ↔ ((𝐺(⟨𝑍, 𝑌· 𝑋)𝐾)(⟨𝑋, 𝑍· 𝑋)(𝐻(⟨𝑋, 𝑌· 𝑍)𝐹)) = ((Id‘𝐶)‘𝑋)))
3229, 31mpbird 247 1 (𝜑 → (𝐻(⟨𝑋, 𝑌· 𝑍)𝐹)(𝑋𝑆𝑍)(𝐺(⟨𝑍, 𝑌· 𝑋)𝐾))
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1072   = wceq 1632  wcel 2139  cop 4327   class class class wbr 4804  cfv 6049  (class class class)co 6814  Basecbs 16079  Hom chom 16174  compcco 16175  Catccat 16546  Idccid 16547  Sectcsect 16625
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-8 2141  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-rep 4923  ax-sep 4933  ax-nul 4941  ax-pow 4992  ax-pr 5055  ax-un 7115
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ne 2933  df-ral 3055  df-rex 3056  df-reu 3057  df-rmo 3058  df-rab 3059  df-v 3342  df-sbc 3577  df-csb 3675  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-pw 4304  df-sn 4322  df-pr 4324  df-op 4328  df-uni 4589  df-iun 4674  df-br 4805  df-opab 4865  df-mpt 4882  df-id 5174  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-rn 5277  df-res 5278  df-ima 5279  df-iota 6012  df-fun 6051  df-fn 6052  df-f 6053  df-f1 6054  df-fo 6055  df-f1o 6056  df-fv 6057  df-riota 6775  df-ov 6817  df-oprab 6818  df-mpt2 6819  df-1st 7334  df-2nd 7335  df-cat 16550  df-cid 16551  df-sect 16628
This theorem is referenced by:  invco  16652
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