Theorem elfm 23955

Description: An element of a mapping filter. (Contributed by Jeff Hankins, 8-Sep-2009.) (Revised by Stefan O'Rear, 6-Aug-2015.)

Assertion

Ref	Expression
elfm	⊢ ((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝐴 ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ (𝐴 ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐵 (𝐹 “ 𝑥) ⊆ 𝐴)))

Distinct variable groups:   𝑥,𝐵   𝑥,𝐶   𝑥,𝐹   𝑥,𝑋   𝑥,𝐴   𝑥,𝑌

Proof of Theorem elfm

Dummy variables 𝑡 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fmval 23951	. . 3 ⊢ ((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ((𝑋 FilMap 𝐹)‘𝐵) = (𝑋filGenran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))))
2	1	eleq2d 2827	. 2 ⊢ ((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝐴 ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ 𝐴 ∈ (𝑋filGenran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)))))
3		eqid 2737	. . . . 5 ⊢ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) = ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))
4	3	fbasrn 23892	. . . 4 ⊢ ((𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋 ∧ 𝑋 ∈ 𝐶) → ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) ∈ (fBas‘𝑋))
5	4	3comr 1126	. . 3 ⊢ ((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) ∈ (fBas‘𝑋))
6		elfg 23879	. . 3 ⊢ (ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) ∈ (fBas‘𝑋) → (𝐴 ∈ (𝑋filGenran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))) ↔ (𝐴 ⊆ 𝑋 ∧ ∃𝑦 ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))𝑦 ⊆ 𝐴)))
7	5, 6	syl 17	. 2 ⊢ ((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝐴 ∈ (𝑋filGenran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))) ↔ (𝐴 ⊆ 𝑋 ∧ ∃𝑦 ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))𝑦 ⊆ 𝐴)))
8		simpr 484	. . . . . 6 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵)
9		eqid 2737	. . . . . 6 ⊢ (𝐹 “ 𝑥) = (𝐹 “ 𝑥)
10		imaeq2 6074	. . . . . . 7 ⊢ (𝑡 = 𝑥 → (𝐹 “ 𝑡) = (𝐹 “ 𝑥))
11	10	rspceeqv 3645	. . . . . 6 ⊢ ((𝑥 ∈ 𝐵 ∧ (𝐹 “ 𝑥) = (𝐹 “ 𝑥)) → ∃𝑡 ∈ 𝐵 (𝐹 “ 𝑥) = (𝐹 “ 𝑡))
12	8, 9, 11	sylancl 586	. . . . 5 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑥 ∈ 𝐵) → ∃𝑡 ∈ 𝐵 (𝐹 “ 𝑥) = (𝐹 “ 𝑡))
13		simpl1 1192	. . . . . . 7 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑥 ∈ 𝐵) → 𝑋 ∈ 𝐶)
14		imassrn 6089	. . . . . . . 8 ⊢ (𝐹 “ 𝑥) ⊆ ran 𝐹
15		frn 6743	. . . . . . . . . 10 ⊢ (𝐹:𝑌⟶𝑋 → ran 𝐹 ⊆ 𝑋)
16	15	3ad2ant3 1136	. . . . . . . . 9 ⊢ ((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ran 𝐹 ⊆ 𝑋)
17	16	adantr 480	. . . . . . . 8 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑥 ∈ 𝐵) → ran 𝐹 ⊆ 𝑋)
18	14, 17	sstrid 3995	. . . . . . 7 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑥 ∈ 𝐵) → (𝐹 “ 𝑥) ⊆ 𝑋)
19	13, 18	ssexd 5324	. . . . . 6 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑥 ∈ 𝐵) → (𝐹 “ 𝑥) ∈ V)
20		eqid 2737	. . . . . . 7 ⊢ (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) = (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))
21	20	elrnmpt 5969	. . . . . 6 ⊢ ((𝐹 “ 𝑥) ∈ V → ((𝐹 “ 𝑥) ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) ↔ ∃𝑡 ∈ 𝐵 (𝐹 “ 𝑥) = (𝐹 “ 𝑡)))
22	19, 21	syl 17	. . . . 5 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑥 ∈ 𝐵) → ((𝐹 “ 𝑥) ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) ↔ ∃𝑡 ∈ 𝐵 (𝐹 “ 𝑥) = (𝐹 “ 𝑡)))
23	12, 22	mpbird 257	. . . 4 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑥 ∈ 𝐵) → (𝐹 “ 𝑥) ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)))
24	10	cbvmptv 5255	. . . . . . 7 ⊢ (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) = (𝑥 ∈ 𝐵 ↦ (𝐹 “ 𝑥))
25	24	elrnmpt 5969	. . . . . 6 ⊢ (𝑦 ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) → (𝑦 ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) ↔ ∃𝑥 ∈ 𝐵 𝑦 = (𝐹 “ 𝑥)))
26	25	ibi 267	. . . . 5 ⊢ (𝑦 ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡)) → ∃𝑥 ∈ 𝐵 𝑦 = (𝐹 “ 𝑥))
27	26	adantl 481	. . . 4 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))) → ∃𝑥 ∈ 𝐵 𝑦 = (𝐹 “ 𝑥))
28		simpr 484	. . . . 5 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 = (𝐹 “ 𝑥)) → 𝑦 = (𝐹 “ 𝑥))
29	28	sseq1d 4015	. . . 4 ⊢ (((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑦 = (𝐹 “ 𝑥)) → (𝑦 ⊆ 𝐴 ↔ (𝐹 “ 𝑥) ⊆ 𝐴))
30	23, 27, 29	rexxfrd 5409	. . 3 ⊢ ((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (∃𝑦 ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))𝑦 ⊆ 𝐴 ↔ ∃𝑥 ∈ 𝐵 (𝐹 “ 𝑥) ⊆ 𝐴))
31	30	anbi2d 630	. 2 ⊢ ((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → ((𝐴 ⊆ 𝑋 ∧ ∃𝑦 ∈ ran (𝑡 ∈ 𝐵 ↦ (𝐹 “ 𝑡))𝑦 ⊆ 𝐴) ↔ (𝐴 ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐵 (𝐹 “ 𝑥) ⊆ 𝐴)))
32	2, 7, 31	3bitrd 305	1 ⊢ ((𝑋 ∈ 𝐶 ∧ 𝐵 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝐴 ∈ ((𝑋 FilMap 𝐹)‘𝐵) ↔ (𝐴 ⊆ 𝑋 ∧ ∃𝑥 ∈ 𝐵 (𝐹 “ 𝑥) ⊆ 𝐴)))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1087   = wceq 1540   ∈ wcel 2108  ∃wrex 3070  Vcvv 3480   ⊆ wss 3951   ↦ cmpt 5225  ran crn 5686   “ cima 5688  ⟶wf 6557  ‘cfv 6561  (class class class)co 7431  fBascfbas 21352  filGencfg 21353   FilMap cfm 23941

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2708  ax-rep 5279  ax-sep 5296  ax-nul 5306  ax-pow 5365  ax-pr 5432

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2892  df-ne 2941  df-nel 3047  df-ral 3062  df-rex 3071  df-reu 3381  df-rab 3437  df-v 3482  df-sbc 3789  df-csb 3900  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-nul 4334  df-if 4526  df-pw 4602  df-sn 4627  df-pr 4629  df-op 4633  df-uni 4908  df-iun 4993  df-br 5144  df-opab 5206  df-mpt 5226  df-id 5578  df-xp 5691  df-rel 5692  df-cnv 5693  df-co 5694  df-dm 5695  df-rn 5696  df-res 5697  df-ima 5698  df-iota 6514  df-fun 6563  df-fn 6564  df-f 6565  df-f1 6566  df-fo 6567  df-f1o 6568  df-fv 6569  df-ov 7434  df-oprab 7435  df-mpo 7436  df-fbas 21361  df-fg 21362  df-fm 23946

This theorem is referenced by:  elfm2  23956  fmfg  23957  rnelfm  23961  fmfnfmlem1  23962  fmfnfm  23966  fmco  23969  flfnei  23999  isflf  24001  isfcf  24042  filnetlem4  36382