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Theorem elfm3 21974
Description: An alternate formulation of elementhood in a mapping filter that requires 𝐹 to be onto. (Contributed by Jeff Hankins, 1-Oct-2009.) (Revised by Stefan O'Rear, 6-Aug-2015.)
Hypothesis
Ref Expression
elfm2.l 𝐿 = (𝑌filGen𝐵)
Assertion
Ref Expression
elfm3 ((𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → (𝐴 ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ ∃𝑥𝐿 𝐴 = (𝐹𝑥)))
Distinct variable groups:   𝑥,𝐵   𝑥,𝐹   𝑥,𝑋   𝑥,𝐴   𝑥,𝐿   𝑥,𝑌

Proof of Theorem elfm3
Dummy variables 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 foima 6261 . . . 4 (𝐹:𝑌onto𝑋 → (𝐹𝑌) = 𝑋)
21adantl 467 . . 3 ((𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → (𝐹𝑌) = 𝑋)
3 fofun 6257 . . . 4 (𝐹:𝑌onto𝑋 → Fun 𝐹)
4 elfvdm 6361 . . . 4 (𝐵 ∈ (fBas‘𝑌) → 𝑌 ∈ dom fBas)
5 funimaexg 6115 . . . 4 ((Fun 𝐹𝑌 ∈ dom fBas) → (𝐹𝑌) ∈ V)
63, 4, 5syl2anr 584 . . 3 ((𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → (𝐹𝑌) ∈ V)
72, 6eqeltrrd 2851 . 2 ((𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → 𝑋 ∈ V)
8 fof 6256 . . . . 5 (𝐹:𝑌onto𝑋𝐹:𝑌𝑋)
9 elfm2.l . . . . . 6 𝐿 = (𝑌filGen𝐵)
109elfm2 21972 . . . . 5 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌𝑋) → (𝐴 ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ (𝐴𝑋 ∧ ∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴)))
118, 10syl3an3 1169 . . . 4 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → (𝐴 ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ (𝐴𝑋 ∧ ∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴)))
12 fgcl 21902 . . . . . . . . . . . 12 (𝐵 ∈ (fBas‘𝑌) → (𝑌filGen𝐵) ∈ (Fil‘𝑌))
139, 12syl5eqel 2854 . . . . . . . . . . 11 (𝐵 ∈ (fBas‘𝑌) → 𝐿 ∈ (Fil‘𝑌))
14133ad2ant2 1128 . . . . . . . . . 10 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → 𝐿 ∈ (Fil‘𝑌))
1514ad2antrr 705 . . . . . . . . 9 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ (𝑦𝐿 ∧ (𝐹𝑦) ⊆ 𝐴)) → 𝐿 ∈ (Fil‘𝑌))
16 simprl 754 . . . . . . . . 9 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ (𝑦𝐿 ∧ (𝐹𝑦) ⊆ 𝐴)) → 𝑦𝐿)
17 cnvimass 5626 . . . . . . . . . . . 12 (𝐹𝐴) ⊆ dom 𝐹
18 fofn 6258 . . . . . . . . . . . . 13 (𝐹:𝑌onto𝑋𝐹 Fn 𝑌)
19 fndm 6130 . . . . . . . . . . . . 13 (𝐹 Fn 𝑌 → dom 𝐹 = 𝑌)
2018, 19syl 17 . . . . . . . . . . . 12 (𝐹:𝑌onto𝑋 → dom 𝐹 = 𝑌)
2117, 20syl5sseq 3802 . . . . . . . . . . 11 (𝐹:𝑌onto𝑋 → (𝐹𝐴) ⊆ 𝑌)
22213ad2ant3 1129 . . . . . . . . . 10 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → (𝐹𝐴) ⊆ 𝑌)
2322ad2antrr 705 . . . . . . . . 9 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ (𝑦𝐿 ∧ (𝐹𝑦) ⊆ 𝐴)) → (𝐹𝐴) ⊆ 𝑌)
2433ad2ant3 1129 . . . . . . . . . . . . 13 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → Fun 𝐹)
2524ad2antrr 705 . . . . . . . . . . . 12 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ 𝑦𝐿) → Fun 𝐹)
269eleq2i 2842 . . . . . . . . . . . . . . 15 (𝑦𝐿𝑦 ∈ (𝑌filGen𝐵))
27 elfg 21895 . . . . . . . . . . . . . . . . 17 (𝐵 ∈ (fBas‘𝑌) → (𝑦 ∈ (𝑌filGen𝐵) ↔ (𝑦𝑌 ∧ ∃𝑧𝐵 𝑧𝑦)))
28273ad2ant2 1128 . . . . . . . . . . . . . . . 16 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → (𝑦 ∈ (𝑌filGen𝐵) ↔ (𝑦𝑌 ∧ ∃𝑧𝐵 𝑧𝑦)))
2928adantr 466 . . . . . . . . . . . . . . 15 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) → (𝑦 ∈ (𝑌filGen𝐵) ↔ (𝑦𝑌 ∧ ∃𝑧𝐵 𝑧𝑦)))
3026, 29syl5bb 272 . . . . . . . . . . . . . 14 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) → (𝑦𝐿 ↔ (𝑦𝑌 ∧ ∃𝑧𝐵 𝑧𝑦)))
3130simprbda 486 . . . . . . . . . . . . 13 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ 𝑦𝐿) → 𝑦𝑌)
32 sseq2 3776 . . . . . . . . . . . . . . . . 17 (dom 𝐹 = 𝑌 → (𝑦 ⊆ dom 𝐹𝑦𝑌))
3332biimpar 463 . . . . . . . . . . . . . . . 16 ((dom 𝐹 = 𝑌𝑦𝑌) → 𝑦 ⊆ dom 𝐹)
3420, 33sylan 569 . . . . . . . . . . . . . . 15 ((𝐹:𝑌onto𝑋𝑦𝑌) → 𝑦 ⊆ dom 𝐹)
35343ad2antl3 1202 . . . . . . . . . . . . . 14 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝑦𝑌) → 𝑦 ⊆ dom 𝐹)
3635adantlr 694 . . . . . . . . . . . . 13 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ 𝑦𝑌) → 𝑦 ⊆ dom 𝐹)
3731, 36syldan 579 . . . . . . . . . . . 12 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ 𝑦𝐿) → 𝑦 ⊆ dom 𝐹)
38 funimass3 6476 . . . . . . . . . . . 12 ((Fun 𝐹𝑦 ⊆ dom 𝐹) → ((𝐹𝑦) ⊆ 𝐴𝑦 ⊆ (𝐹𝐴)))
3925, 37, 38syl2anc 573 . . . . . . . . . . 11 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ 𝑦𝐿) → ((𝐹𝑦) ⊆ 𝐴𝑦 ⊆ (𝐹𝐴)))
4039biimpd 219 . . . . . . . . . 10 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ 𝑦𝐿) → ((𝐹𝑦) ⊆ 𝐴𝑦 ⊆ (𝐹𝐴)))
4140impr 442 . . . . . . . . 9 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ (𝑦𝐿 ∧ (𝐹𝑦) ⊆ 𝐴)) → 𝑦 ⊆ (𝐹𝐴))
42 filss 21877 . . . . . . . . 9 ((𝐿 ∈ (Fil‘𝑌) ∧ (𝑦𝐿 ∧ (𝐹𝐴) ⊆ 𝑌𝑦 ⊆ (𝐹𝐴))) → (𝐹𝐴) ∈ 𝐿)
4315, 16, 23, 41, 42syl13anc 1478 . . . . . . . 8 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ (𝑦𝐿 ∧ (𝐹𝑦) ⊆ 𝐴)) → (𝐹𝐴) ∈ 𝐿)
44 foimacnv 6295 . . . . . . . . . . 11 ((𝐹:𝑌onto𝑋𝐴𝑋) → (𝐹 “ (𝐹𝐴)) = 𝐴)
4544eqcomd 2777 . . . . . . . . . 10 ((𝐹:𝑌onto𝑋𝐴𝑋) → 𝐴 = (𝐹 “ (𝐹𝐴)))
46453ad2antl3 1202 . . . . . . . . 9 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) → 𝐴 = (𝐹 “ (𝐹𝐴)))
4746adantr 466 . . . . . . . 8 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ (𝑦𝐿 ∧ (𝐹𝑦) ⊆ 𝐴)) → 𝐴 = (𝐹 “ (𝐹𝐴)))
48 imaeq2 5603 . . . . . . . . . 10 (𝑥 = (𝐹𝐴) → (𝐹𝑥) = (𝐹 “ (𝐹𝐴)))
4948eqeq2d 2781 . . . . . . . . 9 (𝑥 = (𝐹𝐴) → (𝐴 = (𝐹𝑥) ↔ 𝐴 = (𝐹 “ (𝐹𝐴))))
5049rspcev 3460 . . . . . . . 8 (((𝐹𝐴) ∈ 𝐿𝐴 = (𝐹 “ (𝐹𝐴))) → ∃𝑥𝐿 𝐴 = (𝐹𝑥))
5143, 47, 50syl2anc 573 . . . . . . 7 ((((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) ∧ (𝑦𝐿 ∧ (𝐹𝑦) ⊆ 𝐴)) → ∃𝑥𝐿 𝐴 = (𝐹𝑥))
5251rexlimdvaa 3180 . . . . . 6 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ 𝐴𝑋) → (∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴 → ∃𝑥𝐿 𝐴 = (𝐹𝑥)))
5352expimpd 441 . . . . 5 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → ((𝐴𝑋 ∧ ∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴) → ∃𝑥𝐿 𝐴 = (𝐹𝑥)))
54 simprr 756 . . . . . . . 8 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ (𝑥𝐿𝐴 = (𝐹𝑥))) → 𝐴 = (𝐹𝑥))
55 imassrn 5618 . . . . . . . . 9 (𝐹𝑥) ⊆ ran 𝐹
56 forn 6259 . . . . . . . . . . 11 (𝐹:𝑌onto𝑋 → ran 𝐹 = 𝑋)
57563ad2ant3 1129 . . . . . . . . . 10 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → ran 𝐹 = 𝑋)
5857adantr 466 . . . . . . . . 9 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ (𝑥𝐿𝐴 = (𝐹𝑥))) → ran 𝐹 = 𝑋)
5955, 58syl5sseq 3802 . . . . . . . 8 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ (𝑥𝐿𝐴 = (𝐹𝑥))) → (𝐹𝑥) ⊆ 𝑋)
6054, 59eqsstrd 3788 . . . . . . 7 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ (𝑥𝐿𝐴 = (𝐹𝑥))) → 𝐴𝑋)
61 eqimss2 3807 . . . . . . . . 9 (𝐴 = (𝐹𝑥) → (𝐹𝑥) ⊆ 𝐴)
62 imaeq2 5603 . . . . . . . . . . 11 (𝑦 = 𝑥 → (𝐹𝑦) = (𝐹𝑥))
6362sseq1d 3781 . . . . . . . . . 10 (𝑦 = 𝑥 → ((𝐹𝑦) ⊆ 𝐴 ↔ (𝐹𝑥) ⊆ 𝐴))
6463rspcev 3460 . . . . . . . . 9 ((𝑥𝐿 ∧ (𝐹𝑥) ⊆ 𝐴) → ∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴)
6561, 64sylan2 580 . . . . . . . 8 ((𝑥𝐿𝐴 = (𝐹𝑥)) → ∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴)
6665adantl 467 . . . . . . 7 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ (𝑥𝐿𝐴 = (𝐹𝑥))) → ∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴)
6760, 66jca 501 . . . . . 6 (((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) ∧ (𝑥𝐿𝐴 = (𝐹𝑥))) → (𝐴𝑋 ∧ ∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴))
6867rexlimdvaa 3180 . . . . 5 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → (∃𝑥𝐿 𝐴 = (𝐹𝑥) → (𝐴𝑋 ∧ ∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴)))
6953, 68impbid 202 . . . 4 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → ((𝐴𝑋 ∧ ∃𝑦𝐿 (𝐹𝑦) ⊆ 𝐴) ↔ ∃𝑥𝐿 𝐴 = (𝐹𝑥)))
7011, 69bitrd 268 . . 3 ((𝑋 ∈ V ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → (𝐴 ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ ∃𝑥𝐿 𝐴 = (𝐹𝑥)))
71703coml 1121 . 2 ((𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋𝑋 ∈ V) → (𝐴 ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ ∃𝑥𝐿 𝐴 = (𝐹𝑥)))
727, 71mpd3an3 1573 1 ((𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌onto𝑋) → (𝐴 ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ ∃𝑥𝐿 𝐴 = (𝐹𝑥)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 382  w3a 1071   = wceq 1631  wcel 2145  wrex 3062  Vcvv 3351  wss 3723  ccnv 5248  dom cdm 5249  ran crn 5250  cima 5252  Fun wfun 6025   Fn wfn 6026  wf 6027  ontowfo 6029  cfv 6031  (class class class)co 6793  fBascfbas 19949  filGencfg 19950  Filcfil 21869   FilMap cfm 21957
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1870  ax-4 1885  ax-5 1991  ax-6 2057  ax-7 2093  ax-8 2147  ax-9 2154  ax-10 2174  ax-11 2190  ax-12 2203  ax-13 2408  ax-ext 2751  ax-rep 4904  ax-sep 4915  ax-nul 4923  ax-pow 4974  ax-pr 5034  ax-un 7096
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 835  df-3an 1073  df-tru 1634  df-ex 1853  df-nf 1858  df-sb 2050  df-eu 2622  df-mo 2623  df-clab 2758  df-cleq 2764  df-clel 2767  df-nfc 2902  df-ne 2944  df-nel 3047  df-ral 3066  df-rex 3067  df-reu 3068  df-rab 3070  df-v 3353  df-sbc 3588  df-csb 3683  df-dif 3726  df-un 3728  df-in 3730  df-ss 3737  df-nul 4064  df-if 4226  df-pw 4299  df-sn 4317  df-pr 4319  df-op 4323  df-uni 4575  df-iun 4656  df-br 4787  df-opab 4847  df-mpt 4864  df-id 5157  df-xp 5255  df-rel 5256  df-cnv 5257  df-co 5258  df-dm 5259  df-rn 5260  df-res 5261  df-ima 5262  df-iota 5994  df-fun 6033  df-fn 6034  df-f 6035  df-f1 6036  df-fo 6037  df-f1o 6038  df-fv 6039  df-ov 6796  df-oprab 6797  df-mpt2 6798  df-fbas 19958  df-fg 19959  df-fil 21870  df-fm 21962
This theorem is referenced by:  fmid  21984
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