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Theorem fmcfil 25193

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 6928	. . . 4 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝑋 ∈ dom ∞Met)
2		fmval 23840	. . . 4 ⊢ ((𝑋 ∈ dom ∞Met ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ((𝑋 FilMap 𝐹)‘𝐵) = (𝑋filGenran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))))
3	1, 2	syl3an1 1161	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ((𝑋 FilMap 𝐹)‘𝐵) = (𝑋filGenran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))))
4	3	eleq1d 2814	. 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 1134	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → 𝐷 ∈ (∞Met‘𝑋))
6		simp2 1135	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → 𝐵 ∈ (fBas‘𝑌))
7		simp3 1136	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → 𝐹:𝑌⟶𝑋)
8	1	3ad2ant1 1131	. . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → 𝑋 ∈ dom ∞Met)
9		eqid 2728	. . . . 5 ⊢ ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦)) = ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))
10	9	fbasrn 23781	. . . 4 ⊢ ((𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋 ∧ 𝑋 ∈ dom ∞Met) → ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦)) ∈ (fBas‘𝑋))
11	6, 7, 8, 10	syl3anc 1369	. . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ran (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦)) ∈ (fBas‘𝑋))
12		fgcfil 25192	. . 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 583	. 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 6068	. . . . . . . 8 ⊢ (𝐹 “ 𝑦) ⊆ ran 𝐹
15		frn 6723	. . . . . . . . 9 ⊢ (𝐹:𝑌⟶𝑋 → ran 𝐹 ⊆ 𝑋)
16	15	3ad2ant3 1133	. . . . . . . 8 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ran 𝐹 ⊆ 𝑋)
17	14, 16	sstrid 3989	. . . . . . 7 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝐹 “ 𝑦) ⊆ 𝑋)
18	8, 17	ssexd 5318	. . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝐹 “ 𝑦) ∈ V)
19	18	ralrimivw 3146	. . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ∀𝑦 ∈ 𝐵 (𝐹 “ 𝑦) ∈ V)
20		eqid 2728	. . . . . 6 ⊢ (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦)) = (𝑦 ∈ 𝐵 ↦ (𝐹 “ 𝑦))
21		raleq 3318	. . . . . . 7 ⊢ (𝑠 = (𝐹 “ 𝑦) → (∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥))
22	21	raleqbi1dv 3329	. . . . . 6 ⊢ (𝑠 = (𝐹 “ 𝑦) → (∀𝑢 ∈ 𝑠 ∀𝑣 ∈ 𝑠 (𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑢 ∈ (𝐹 “ 𝑦)∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥))
23	20, 22	rexrnmptw 7099	. . . . 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 1191	. . . . . . . 8 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → 𝐹:𝑌⟶𝑋)
26	25	ffnd 6717	. . . . . . 7 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → 𝐹 Fn 𝑌)
27		fbelss 23730	. . . . . . . 8 ⊢ ((𝐵 ∈ (fBas‘𝑌) ∧ 𝑦 ∈ 𝐵) → 𝑦 ⊆ 𝑌)
28	6, 27	sylan 579	. . . . . . 7 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ 𝐵) → 𝑦 ⊆ 𝑌)
29		oveq1 7421	. . . . . . . . . 10 ⊢ (𝑢 = (𝐹‘𝑧) → (𝑢𝐷𝑣) = ((𝐹‘𝑧)𝐷𝑣))
30	29	breq1d 5152	. . . . . . . . 9 ⊢ (𝑢 = (𝐹‘𝑧) → ((𝑢𝐷𝑣) < 𝑥 ↔ ((𝐹‘𝑧)𝐷𝑣) < 𝑥))
31	30	ralbidv 3173	. . . . . . . 8 ⊢ (𝑢 = (𝐹‘𝑧) → (∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑣 ∈ (𝐹 “ 𝑦)((𝐹‘𝑧)𝐷𝑣) < 𝑥))
32	31	ralima 7244	. . . . . . 7 ⊢ ((𝐹 Fn 𝑌 ∧ 𝑦 ⊆ 𝑌) → (∀𝑢 ∈ (𝐹 “ 𝑦)∀𝑣 ∈ (𝐹 “ 𝑦)(𝑢𝐷𝑣) < 𝑥 ↔ ∀𝑧 ∈ 𝑦 ∀𝑣 ∈ (𝐹 “ 𝑦)((𝐹‘𝑧)𝐷𝑣) < 𝑥))
33	26, 28, 32	syl2anc 583	. . . . . 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))
34		oveq2 7422	. . . . . . . . . 10 ⊢ (𝑣 = (𝐹‘𝑤) → ((𝐹‘𝑧)𝐷𝑣) = ((𝐹‘𝑧)𝐷(𝐹‘𝑤)))
35	34	breq1d 5152	. . . . . . . . 9 ⊢ (𝑣 = (𝐹‘𝑤) → (((𝐹‘𝑧)𝐷𝑣) < 𝑥 ↔ ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
36	35	ralima 7244	. . . . . . . 8 ⊢ ((𝐹 Fn 𝑌 ∧ 𝑦 ⊆ 𝑌) → (∀𝑣 ∈ (𝐹 “ 𝑦)((𝐹‘𝑧)𝐷𝑣) < 𝑥 ↔ ∀𝑤 ∈ 𝑦 ((𝐹‘𝑧)𝐷(𝐹‘𝑤)) < 𝑥))
37	26, 28, 36	syl2anc 583	. . . . . . 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))
38	37	ralbidv 3173	. . . . . 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))
39	33, 38	bitrd 279	. . . . 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))
40	39	rexbidva 3172	. . . 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))
41	24, 40	bitrd 279	. . 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))
42	41	ralbidv 3173	. 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))
43	4, 13, 42	3bitrd 305	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))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 = wceq 1534 ∈ wcel 2099 ∀wral 3057 ∃wrex 3066 Vcvv 3470 ⊆ wss 3945 class class class wbr 5142 ↦ cmpt 5225 dom cdm 5672 ran crn 5673 “ cima 5675 Fn wfn 6537 ⟶wf 6538 ‘cfv 6542 (class class class)co 7414 < clt 11272 ℝ⁺crp 13000 ∞Metcxmet 21257 fBascfbas 21260 filGencfg 21261 FilMap cfm 23830 CauFilccfil 25173

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2699 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-cnex 11188 ax-resscn 11189 ax-1cn 11190 ax-icn 11191 ax-addcl 11192 ax-addrcl 11193 ax-mulcl 11194 ax-mulrcl 11195 ax-mulcom 11196 ax-addass 11197 ax-mulass 11198 ax-distr 11199 ax-i2m1 11200 ax-1ne0 11201 ax-1rid 11202 ax-rnegex 11203 ax-rrecex 11204 ax-cnre 11205 ax-pre-lttri 11206 ax-pre-lttrn 11207 ax-pre-ltadd 11208 ax-pre-mulgt0 11209

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2937 df-nel 3043 df-ral 3058 df-rex 3067 df-rmo 3372 df-reu 3373 df-rab 3429 df-v 3472 df-sbc 3776 df-csb 3891 df-dif 3948 df-un 3950 df-in 3952 df-ss 3962 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-iun 4993 df-br 5143 df-opab 5205 df-mpt 5226 df-id 5570 df-po 5584 df-so 5585 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-1st 7987 df-2nd 7988 df-er 8718 df-map 8840 df-en 8958 df-dom 8959 df-sdom 8960 df-pnf 11274 df-mnf 11275 df-xr 11276 df-ltxr 11277 df-le 11278 df-sub 11470 df-neg 11471 df-div 11896 df-2 12299 df-rp 13001 df-xneg 13118 df-xadd 13119 df-xmul 13120 df-ico 13356 df-xmet 21265 df-fbas 21269 df-fg 21270 df-fil 23743 df-fm 23835 df-cfil 25176

This theorem is referenced by: caucfil 25204

W3C validator

	
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