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Theorem fmco 21812
Description: Composition of image filters. (Contributed by Mario Carneiro, 27-Aug-2015.)
Assertion
Ref Expression
fmco (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → ((𝑋 FilMap (𝐹𝐺))‘𝐵) = ((𝑋 FilMap 𝐹)‘((𝑌 FilMap 𝐺)‘𝐵)))

Proof of Theorem fmco
Dummy variables 𝑡 𝑠 𝑢 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simpl3 1086 . . . . . . . . . . 11 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → 𝐵 ∈ (fBas‘𝑍))
2 ssfg 21723 . . . . . . . . . . 11 (𝐵 ∈ (fBas‘𝑍) → 𝐵 ⊆ (𝑍filGen𝐵))
31, 2syl 17 . . . . . . . . . 10 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → 𝐵 ⊆ (𝑍filGen𝐵))
43sseld 3635 . . . . . . . . 9 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (𝑢𝐵𝑢 ∈ (𝑍filGen𝐵)))
5 simpl2 1085 . . . . . . . . . 10 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → 𝑌𝑊)
6 simprr 811 . . . . . . . . . 10 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → 𝐺:𝑍𝑌)
7 eqid 2651 . . . . . . . . . . . 12 (𝑍filGen𝐵) = (𝑍filGen𝐵)
87imaelfm 21802 . . . . . . . . . . 11 (((𝑌𝑊𝐵 ∈ (fBas‘𝑍) ∧ 𝐺:𝑍𝑌) ∧ 𝑢 ∈ (𝑍filGen𝐵)) → (𝐺𝑢) ∈ ((𝑌 FilMap 𝐺)‘𝐵))
98ex 449 . . . . . . . . . 10 ((𝑌𝑊𝐵 ∈ (fBas‘𝑍) ∧ 𝐺:𝑍𝑌) → (𝑢 ∈ (𝑍filGen𝐵) → (𝐺𝑢) ∈ ((𝑌 FilMap 𝐺)‘𝐵)))
105, 1, 6, 9syl3anc 1366 . . . . . . . . 9 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (𝑢 ∈ (𝑍filGen𝐵) → (𝐺𝑢) ∈ ((𝑌 FilMap 𝐺)‘𝐵)))
114, 10syld 47 . . . . . . . 8 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (𝑢𝐵 → (𝐺𝑢) ∈ ((𝑌 FilMap 𝐺)‘𝐵)))
1211imp 444 . . . . . . 7 ((((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) ∧ 𝑢𝐵) → (𝐺𝑢) ∈ ((𝑌 FilMap 𝐺)‘𝐵))
13 imaeq2 5497 . . . . . . . . . . 11 (𝑡 = (𝐺𝑢) → (𝐹𝑡) = (𝐹 “ (𝐺𝑢)))
14 imaco 5678 . . . . . . . . . . 11 ((𝐹𝐺) “ 𝑢) = (𝐹 “ (𝐺𝑢))
1513, 14syl6eqr 2703 . . . . . . . . . 10 (𝑡 = (𝐺𝑢) → (𝐹𝑡) = ((𝐹𝐺) “ 𝑢))
1615sseq1d 3665 . . . . . . . . 9 (𝑡 = (𝐺𝑢) → ((𝐹𝑡) ⊆ 𝑠 ↔ ((𝐹𝐺) “ 𝑢) ⊆ 𝑠))
1716rspcev 3340 . . . . . . . 8 (((𝐺𝑢) ∈ ((𝑌 FilMap 𝐺)‘𝐵) ∧ ((𝐹𝐺) “ 𝑢) ⊆ 𝑠) → ∃𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵)(𝐹𝑡) ⊆ 𝑠)
1817ex 449 . . . . . . 7 ((𝐺𝑢) ∈ ((𝑌 FilMap 𝐺)‘𝐵) → (((𝐹𝐺) “ 𝑢) ⊆ 𝑠 → ∃𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵)(𝐹𝑡) ⊆ 𝑠))
1912, 18syl 17 . . . . . 6 ((((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) ∧ 𝑢𝐵) → (((𝐹𝐺) “ 𝑢) ⊆ 𝑠 → ∃𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵)(𝐹𝑡) ⊆ 𝑠))
2019rexlimdva 3060 . . . . 5 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠 → ∃𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵)(𝐹𝑡) ⊆ 𝑠))
21 elfm 21798 . . . . . . . 8 ((𝑌𝑊𝐵 ∈ (fBas‘𝑍) ∧ 𝐺:𝑍𝑌) → (𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵) ↔ (𝑡𝑌 ∧ ∃𝑢𝐵 (𝐺𝑢) ⊆ 𝑡)))
225, 1, 6, 21syl3anc 1366 . . . . . . 7 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵) ↔ (𝑡𝑌 ∧ ∃𝑢𝐵 (𝐺𝑢) ⊆ 𝑡)))
23 sstr2 3643 . . . . . . . . . . 11 (((𝐹𝐺) “ 𝑢) ⊆ (𝐹𝑡) → ((𝐹𝑡) ⊆ 𝑠 → ((𝐹𝐺) “ 𝑢) ⊆ 𝑠))
24 imass2 5536 . . . . . . . . . . . 12 ((𝐺𝑢) ⊆ 𝑡 → (𝐹 “ (𝐺𝑢)) ⊆ (𝐹𝑡))
2514, 24syl5eqss 3682 . . . . . . . . . . 11 ((𝐺𝑢) ⊆ 𝑡 → ((𝐹𝐺) “ 𝑢) ⊆ (𝐹𝑡))
2623, 25syl11 33 . . . . . . . . . 10 ((𝐹𝑡) ⊆ 𝑠 → ((𝐺𝑢) ⊆ 𝑡 → ((𝐹𝐺) “ 𝑢) ⊆ 𝑠))
2726reximdv 3045 . . . . . . . . 9 ((𝐹𝑡) ⊆ 𝑠 → (∃𝑢𝐵 (𝐺𝑢) ⊆ 𝑡 → ∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠))
2827com12 32 . . . . . . . 8 (∃𝑢𝐵 (𝐺𝑢) ⊆ 𝑡 → ((𝐹𝑡) ⊆ 𝑠 → ∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠))
2928adantl 481 . . . . . . 7 ((𝑡𝑌 ∧ ∃𝑢𝐵 (𝐺𝑢) ⊆ 𝑡) → ((𝐹𝑡) ⊆ 𝑠 → ∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠))
3022, 29syl6bi 243 . . . . . 6 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵) → ((𝐹𝑡) ⊆ 𝑠 → ∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠)))
3130rexlimdv 3059 . . . . 5 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (∃𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵)(𝐹𝑡) ⊆ 𝑠 → ∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠))
3220, 31impbid 202 . . . 4 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠 ↔ ∃𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵)(𝐹𝑡) ⊆ 𝑠))
3332anbi2d 740 . . 3 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → ((𝑠𝑋 ∧ ∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠) ↔ (𝑠𝑋 ∧ ∃𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵)(𝐹𝑡) ⊆ 𝑠)))
34 simpl1 1084 . . . 4 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → 𝑋𝑉)
35 fco 6096 . . . . 5 ((𝐹:𝑌𝑋𝐺:𝑍𝑌) → (𝐹𝐺):𝑍𝑋)
3635adantl 481 . . . 4 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (𝐹𝐺):𝑍𝑋)
37 elfm 21798 . . . 4 ((𝑋𝑉𝐵 ∈ (fBas‘𝑍) ∧ (𝐹𝐺):𝑍𝑋) → (𝑠 ∈ ((𝑋 FilMap (𝐹𝐺))‘𝐵) ↔ (𝑠𝑋 ∧ ∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠)))
3834, 1, 36, 37syl3anc 1366 . . 3 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (𝑠 ∈ ((𝑋 FilMap (𝐹𝐺))‘𝐵) ↔ (𝑠𝑋 ∧ ∃𝑢𝐵 ((𝐹𝐺) “ 𝑢) ⊆ 𝑠)))
39 fmfil 21795 . . . . . 6 ((𝑌𝑊𝐵 ∈ (fBas‘𝑍) ∧ 𝐺:𝑍𝑌) → ((𝑌 FilMap 𝐺)‘𝐵) ∈ (Fil‘𝑌))
405, 1, 6, 39syl3anc 1366 . . . . 5 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → ((𝑌 FilMap 𝐺)‘𝐵) ∈ (Fil‘𝑌))
41 filfbas 21699 . . . . 5 (((𝑌 FilMap 𝐺)‘𝐵) ∈ (Fil‘𝑌) → ((𝑌 FilMap 𝐺)‘𝐵) ∈ (fBas‘𝑌))
4240, 41syl 17 . . . 4 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → ((𝑌 FilMap 𝐺)‘𝐵) ∈ (fBas‘𝑌))
43 simprl 809 . . . 4 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → 𝐹:𝑌𝑋)
44 elfm 21798 . . . 4 ((𝑋𝑉 ∧ ((𝑌 FilMap 𝐺)‘𝐵) ∈ (fBas‘𝑌) ∧ 𝐹:𝑌𝑋) → (𝑠 ∈ ((𝑋 FilMap 𝐹)‘((𝑌 FilMap 𝐺)‘𝐵)) ↔ (𝑠𝑋 ∧ ∃𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵)(𝐹𝑡) ⊆ 𝑠)))
4534, 42, 43, 44syl3anc 1366 . . 3 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (𝑠 ∈ ((𝑋 FilMap 𝐹)‘((𝑌 FilMap 𝐺)‘𝐵)) ↔ (𝑠𝑋 ∧ ∃𝑡 ∈ ((𝑌 FilMap 𝐺)‘𝐵)(𝐹𝑡) ⊆ 𝑠)))
4633, 38, 453bitr4d 300 . 2 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → (𝑠 ∈ ((𝑋 FilMap (𝐹𝐺))‘𝐵) ↔ 𝑠 ∈ ((𝑋 FilMap 𝐹)‘((𝑌 FilMap 𝐺)‘𝐵))))
4746eqrdv 2649 1 (((𝑋𝑉𝑌𝑊𝐵 ∈ (fBas‘𝑍)) ∧ (𝐹:𝑌𝑋𝐺:𝑍𝑌)) → ((𝑋 FilMap (𝐹𝐺))‘𝐵) = ((𝑋 FilMap 𝐹)‘((𝑌 FilMap 𝐺)‘𝐵)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383  w3a 1054   = wceq 1523  wcel 2030  wrex 2942  wss 3607  cima 5146  ccom 5147  wf 5922  cfv 5926  (class class class)co 6690  fBascfbas 19782  filGencfg 19783  Filcfil 21696   FilMap cfm 21784
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-op 4217  df-uni 4469  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-id 5053  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-fbas 19791  df-fg 19792  df-fil 21697  df-fm 21789
This theorem is referenced by:  ufldom  21813  flfcnp  21855
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