Theorem fmcfil 22878

Description: The Cauchy filter condition for a filter map. (Contributed by Mario Carneiro, 13-Oct-2015.)

Assertion

Ref	Expression
fmcfil	⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (((𝑋 FilMap 𝐹)‘𝐵) ∈ (CauFil‘𝐷) ↔ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝑦 ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))

Distinct variable groups:   𝑥,𝑤,𝑦,𝑧,𝐵   𝑤,𝐹,𝑥,𝑦,𝑧   𝑤,𝑋,𝑥,𝑦,𝑧   𝑤,𝑌,𝑥,𝑦,𝑧   𝑤,𝐷,𝑥,𝑦,𝑧

Proof of Theorem fmcfil

Dummy variables 𝑢 𝑠 𝑣 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		elfvdm 6130	. . . 4 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝑋 ∈ dom ∞Met)
2		fmval 21557	. . . 4 ⊢ ((𝑋 ∈ dom ∞Met ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ((𝑋 FilMap 𝐹)‘𝐵) = (𝑋filGenran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))))
3	1, 2	syl3an1 1351	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ((𝑋 FilMap 𝐹)‘𝐵) = (𝑋filGenran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))))
4	3	eleq1d 2672	. 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (((𝑋 FilMap 𝐹)‘𝐵) ∈ (CauFil‘𝐷) ↔ (𝑋filGenran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))) ∈ (CauFil‘𝐷)))
5		simp1 1054	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → 𝐷 ∈ (∞Met‘𝑋))
6		simp2 1055	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → 𝐵 ∈ (fBas‘𝑌))
7		simp3 1056	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → 𝐹:𝑌⟶𝑋)
8	1	3ad2ant1 1075	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → 𝑋 ∈ dom ∞Met)
9		eqid 2610	. . . . 5 ⊢ ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦)) = ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))
10	9	fbasrn 21498	. . . 4 ⊢ ((𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋 ∧ 𝑋 ∈ dom ∞Met) → ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦)) ∈ (fBas‘𝑋))
11	6, 7, 8, 10	syl3anc 1318	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦)) ∈ (fBas‘𝑋))
12		fgcfil 22877	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦)) ∈ (fBas‘𝑋)) → ((𝑋filGenran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))) ∈ (CauFil‘𝐷) ↔ ∀𝑥 ∈ ℝ+ ∃𝑠 ∈ ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))∀𝑢 ∈ 𝑠 ∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥))
13	5, 11, 12	syl2anc 691	. 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ((𝑋filGenran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))) ∈ (CauFil‘𝐷) ↔ ∀𝑥 ∈ ℝ+ ∃𝑠 ∈ ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))∀𝑢 ∈ 𝑠 ∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥))
14		imassrn 5396	. . . . . . . 8 ⊢ (𝐹 “ 𝑦) ⊆ ran 𝐹
15		frn 5966	. . . . . . . . 9 ⊢ (𝐹:𝑌⟶𝑋 → ran 𝐹 ⊆ 𝑋)
16	15	3ad2ant3 1077	. . . . . . . 8 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ran 𝐹 ⊆ 𝑋)
17	14, 16	syl5ss 3579	. . . . . . 7 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝐹 “ 𝑦) ⊆ 𝑋)
18	8, 17	ssexd 4733	. . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝐹 “ 𝑦) ∈ V)
19	18	ralrimivw 2950	. . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ∀𝑦 ∈ 𝐵 (𝐹 “ 𝑦) ∈ V)
20		eqid 2610	. . . . . 6 ⊢ (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦)) = (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))
21		raleq 3115	. . . . . . 7 ⊢ (𝑠 = (𝐹 “ 𝑦) → (∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥))
22	21	raleqbi1dv 3123	. . . . . 6 ⊢ (𝑠 = (𝐹 “ 𝑦) → (∀𝑢 ∈ 𝑠 ∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑢 ∈ (𝐹 “ 𝑦)∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥))
23	20, 22	rexrnmpt 6277	. . . . 5 ⊢ (∀𝑦 ∈ 𝐵 (𝐹 “ 𝑦) ∈ V → (∃𝑠 ∈ ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))∀𝑢 ∈ 𝑠 ∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥 ↔ ∃𝑦 ∈ 𝐵 ∀𝑢 ∈ (𝐹 “ 𝑦)∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥))
24	19, 23	syl 17	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (∃𝑠 ∈ ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))∀𝑢 ∈ 𝑠 ∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥 ↔ ∃𝑦 ∈ 𝐵 ∀𝑢 ∈ (𝐹 “ 𝑦)∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥))
25		simpl3 1059	. . . . . . . 8 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → 𝐹:𝑌⟶𝑋)
26		ffn 5958	. . . . . . . 8 ⊢ (𝐹:𝑌⟶𝑋 → 𝐹 Fn 𝑌)
27	25, 26	syl 17	. . . . . . 7 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → 𝐹 Fn 𝑌)
28		fbelss 21447	. . . . . . . 8 ⊢ ((𝐵 ∈ (fBas‘𝑌) ∧ 𝑦 ∈ 𝐵) → 𝑦 ⊆ 𝑌)
29	6, 28	sylan 487	. . . . . . 7 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → 𝑦 ⊆ 𝑌)
30		oveq1 6556	. . . . . . . . . 10 ⊢ (𝑢 = (𝐹‘𝑧) → (𝑢𝐷𝑣) = ((𝐹‘𝑧)𝐷𝑣))
31	30	breq1d 4593	. . . . . . . . 9 ⊢ (𝑢 = (𝐹‘𝑧) → ((𝑢𝐷𝑣) < 𝑥 ↔ ((𝐹‘𝑧)𝐷𝑣) < 𝑥))
32	31	ralbidv 2969	. . . . . . . 8 ⊢ (𝑢 = (𝐹‘𝑧) → (∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑣 ∈ (𝐹 “ 𝑦)((𝐹‘𝑧)𝐷𝑣) < 𝑥))
33	32	ralima 6402	. . . . . . 7 ⊢ ((𝐹 Fn 𝑌 ∧ 𝑦 ⊆ 𝑌) → (∀𝑢 ∈ (𝐹 “ 𝑦)∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑧 ∈ 𝑦 ∀𝑣 ∈ (𝐹 “ 𝑦)((𝐹‘𝑧)𝐷𝑣) < 𝑥))
34	27, 29, 33	syl2anc 691	. . . . . 6 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → (∀𝑢 ∈ (𝐹 “ 𝑦)∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑧 ∈ 𝑦 ∀𝑣 ∈ (𝐹 “ 𝑦)((𝐹‘𝑧)𝐷𝑣) < 𝑥))
35		oveq2 6557	. . . . . . . . . 10 ⊢ (𝑣 = (𝐹‘𝑤) → ((𝐹‘𝑧)𝐷𝑣) = ((𝐹‘𝑧)𝐷(𝐹‘𝑤)))
36	35	breq1d 4593	. . . . . . . . 9 ⊢ (𝑣 = (𝐹‘𝑤) → (((𝐹‘𝑧)𝐷𝑣) < 𝑥 ↔ ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
37	36	ralima 6402	. . . . . . . 8 ⊢ ((𝐹 Fn 𝑌 ∧ 𝑦 ⊆ 𝑌) → (∀𝑣 ∈ (𝐹 “ 𝑦)((𝐹‘𝑧)𝐷𝑣) < 𝑥 ↔ ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
38	27, 29, 37	syl2anc 691	. . . . . . 7 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → (∀𝑣 ∈ (𝐹 “ 𝑦)((𝐹‘𝑧)𝐷𝑣) < 𝑥 ↔ ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
39	38	ralbidv 2969	. . . . . 6 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → (∀𝑧 ∈ 𝑦 ∀𝑣 ∈ (𝐹 “ 𝑦)((𝐹‘𝑧)𝐷𝑣) < 𝑥 ↔ ∀𝑧 ∈ 𝑦 ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
40	34, 39	bitrd 267	. . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → (∀𝑢 ∈ (𝐹 “ 𝑦)∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑧 ∈ 𝑦 ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
41	40	rexbidva 3031	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (∃𝑦 ∈ 𝐵 ∀𝑢 ∈ (𝐹 “ 𝑦)∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥 ↔ ∃𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝑦 ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
42	24, 41	bitrd 267	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (∃𝑠 ∈ ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))∀𝑢 ∈ 𝑠 ∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥 ↔ ∃𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝑦 ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
43	42	ralbidv 2969	. 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (∀𝑥 ∈ ℝ+ ∃𝑠 ∈ ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))∀𝑢 ∈ 𝑠 ∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝑦 ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
44	4, 13, 43	3bitrd 293	1 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (((𝑋 FilMap 𝐹)‘𝐵) ∈ (CauFil‘𝐷) ↔ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝑦 ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977  ∀wral 2896  ∃wrex 2897  Vcvv 3173   ⊆ wss 3540   class class class wbr 4583   ↦ cmpt 4643  dom cdm 5038  ran crn 5039   “ cima 5041   Fn wfn 5799  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   < clt 9953  ℝ⁺crp 11708  ∞Metcxmt 19552  fBascfbas 19555  filGencfg 19556   FilMap cfm 21547  CauFilccfil 22858

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-id 4953  df-po 4959  df-so 4960  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-1st 7059  df-2nd 7060  df-er 7629  df-map 7746  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-div 10564  df-2 10956  df-rp 11709  df-xneg 11822  df-xadd 11823  df-xmul 11824  df-ico 12052  df-xmet 19560  df-fbas 19564  df-fg 19565  df-fil 21460  df-fm 21552  df-cfil 22861

This theorem is referenced by:  caucfil  22889