Theorem rnelfm 23838

Description: A condition for a filter to be an image filter for a given function. (Contributed by Jeff Hankins, 14-Nov-2009.) (Revised by Stefan O'Rear, 8-Aug-2015.)

Assertion

Ref	Expression
rnelfm	⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (𝐿 ∈ ran (𝑋 FilMap 𝐹) ↔ ran 𝐹 ∈ 𝐿))

Proof of Theorem rnelfm

Dummy variables 𝑏 𝑠 𝑡 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		filtop 23740	. . . . . . 7 ⊢ (𝐿 ∈ (Fil‘𝑋) → 𝑋 ∈ 𝐿)
2	1	3ad2ant2 1134	. . . . . 6 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → 𝑋 ∈ 𝐿)
3		simp1 1136	. . . . . 6 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → 𝑌 ∈ 𝐴)
4		simp3 1138	. . . . . 6 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → 𝐹:𝑌⟶𝑋)
5		fmf 23830	. . . . . 6 ⊢ ((𝑋 ∈ 𝐿 ∧ 𝑌 ∈ 𝐴 ∧ 𝐹:𝑌⟶𝑋) → (𝑋 FilMap 𝐹):(fBas‘𝑌)⟶(Fil‘𝑋))
6	2, 3, 4, 5	syl3anc 1373	. . . . 5 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (𝑋 FilMap 𝐹):(fBas‘𝑌)⟶(Fil‘𝑋))
7	6	ffnd 6653	. . . 4 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (𝑋 FilMap 𝐹) Fn (fBas‘𝑌))
8		fvelrnb 6883	. . . 4 ⊢ ((𝑋 FilMap 𝐹) Fn (fBas‘𝑌) → (𝐿 ∈ ran (𝑋 FilMap 𝐹) ↔ ∃𝑏 ∈ (fBas‘𝑌)((𝑋 FilMap 𝐹)‘𝑏) = 𝐿))
9	7, 8	syl 17	. . 3 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (𝐿 ∈ ran (𝑋 FilMap 𝐹) ↔ ∃𝑏 ∈ (fBas‘𝑌)((𝑋 FilMap 𝐹)‘𝑏) = 𝐿))
10		ffn 6652	. . . . . . . . . . . 12 ⊢ (𝐹:𝑌⟶𝑋 → 𝐹 Fn 𝑌)
11		dffn4 6742	. . . . . . . . . . . 12 ⊢ (𝐹 Fn 𝑌 ↔ 𝐹:𝑌–onto→ran 𝐹)
12	10, 11	sylib 218	. . . . . . . . . . 11 ⊢ (𝐹:𝑌⟶𝑋 → 𝐹:𝑌–onto→ran 𝐹)
13		foima 6741	. . . . . . . . . . 11 ⊢ (𝐹:𝑌–onto→ran 𝐹 → (𝐹 “ 𝑌) = ran 𝐹)
14	12, 13	syl 17	. . . . . . . . . 10 ⊢ (𝐹:𝑌⟶𝑋 → (𝐹 “ 𝑌) = ran 𝐹)
15	14	ad2antlr 727	. . . . . . . . 9 ⊢ (((𝑋 ∈ 𝐿 ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑏 ∈ (fBas‘𝑌)) → (𝐹 “ 𝑌) = ran 𝐹)
16		simpll 766	. . . . . . . . . 10 ⊢ (((𝑋 ∈ 𝐿 ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑏 ∈ (fBas‘𝑌)) → 𝑋 ∈ 𝐿)
17		simpr 484	. . . . . . . . . 10 ⊢ (((𝑋 ∈ 𝐿 ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑏 ∈ (fBas‘𝑌)) → 𝑏 ∈ (fBas‘𝑌))
18		simplr 768	. . . . . . . . . 10 ⊢ (((𝑋 ∈ 𝐿 ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑏 ∈ (fBas‘𝑌)) → 𝐹:𝑌⟶𝑋)
19		fgcl 23763	. . . . . . . . . . . 12 ⊢ (𝑏 ∈ (fBas‘𝑌) → (𝑌filGen𝑏) ∈ (Fil‘𝑌))
20		filtop 23740	. . . . . . . . . . . 12 ⊢ ((𝑌filGen𝑏) ∈ (Fil‘𝑌) → 𝑌 ∈ (𝑌filGen𝑏))
21	19, 20	syl 17	. . . . . . . . . . 11 ⊢ (𝑏 ∈ (fBas‘𝑌) → 𝑌 ∈ (𝑌filGen𝑏))
22	21	adantl 481	. . . . . . . . . 10 ⊢ (((𝑋 ∈ 𝐿 ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑏 ∈ (fBas‘𝑌)) → 𝑌 ∈ (𝑌filGen𝑏))
23		eqid 2729	. . . . . . . . . . 11 ⊢ (𝑌filGen𝑏) = (𝑌filGen𝑏)
24	23	imaelfm 23836	. . . . . . . . . 10 ⊢ (((𝑋 ∈ 𝐿 ∧ 𝑏 ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑌 ∈ (𝑌filGen𝑏)) → (𝐹 “ 𝑌) ∈ ((𝑋 FilMap 𝐹)‘𝑏))
25	16, 17, 18, 22, 24	syl31anc 1375	. . . . . . . . 9 ⊢ (((𝑋 ∈ 𝐿 ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑏 ∈ (fBas‘𝑌)) → (𝐹 “ 𝑌) ∈ ((𝑋 FilMap 𝐹)‘𝑏))
26	15, 25	eqeltrrd 2829	. . . . . . . 8 ⊢ (((𝑋 ∈ 𝐿 ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑏 ∈ (fBas‘𝑌)) → ran 𝐹 ∈ ((𝑋 FilMap 𝐹)‘𝑏))
27		eleq2 2817	. . . . . . . 8 ⊢ (((𝑋 FilMap 𝐹)‘𝑏) = 𝐿 → (ran 𝐹 ∈ ((𝑋 FilMap 𝐹)‘𝑏) ↔ ran 𝐹 ∈ 𝐿))
28	26, 27	syl5ibcom 245	. . . . . . 7 ⊢ (((𝑋 ∈ 𝐿 ∧ 𝐹:𝑌⟶𝑋) ∧ 𝑏 ∈ (fBas‘𝑌)) → (((𝑋 FilMap 𝐹)‘𝑏) = 𝐿 → ran 𝐹 ∈ 𝐿))
29	28	ex 412	. . . . . 6 ⊢ ((𝑋 ∈ 𝐿 ∧ 𝐹:𝑌⟶𝑋) → (𝑏 ∈ (fBas‘𝑌) → (((𝑋 FilMap 𝐹)‘𝑏) = 𝐿 → ran 𝐹 ∈ 𝐿)))
30	1, 29	sylan 580	. . . . 5 ⊢ ((𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (𝑏 ∈ (fBas‘𝑌) → (((𝑋 FilMap 𝐹)‘𝑏) = 𝐿 → ran 𝐹 ∈ 𝐿)))
31	30	3adant1 1130	. . . 4 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (𝑏 ∈ (fBas‘𝑌) → (((𝑋 FilMap 𝐹)‘𝑏) = 𝐿 → ran 𝐹 ∈ 𝐿)))
32	31	rexlimdv 3128	. . 3 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (∃𝑏 ∈ (fBas‘𝑌)((𝑋 FilMap 𝐹)‘𝑏) = 𝐿 → ran 𝐹 ∈ 𝐿))
33	9, 32	sylbid 240	. 2 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (𝐿 ∈ ran (𝑋 FilMap 𝐹) → ran 𝐹 ∈ 𝐿))
34		simpl2 1193	. . . . . . . . 9 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → 𝐿 ∈ (Fil‘𝑋))
35		filelss 23737	. . . . . . . . . 10 ⊢ ((𝐿 ∈ (Fil‘𝑋) ∧ 𝑡 ∈ 𝐿) → 𝑡 ⊆ 𝑋)
36	35	ex 412	. . . . . . . . 9 ⊢ (𝐿 ∈ (Fil‘𝑋) → (𝑡 ∈ 𝐿 → 𝑡 ⊆ 𝑋))
37	34, 36	syl 17	. . . . . . . 8 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (𝑡 ∈ 𝐿 → 𝑡 ⊆ 𝑋))
38		simpr 484	. . . . . . . . . . . 12 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑡 ∈ 𝐿) → 𝑡 ∈ 𝐿)
39		eqidd 2730	. . . . . . . . . . . 12 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑡 ∈ 𝐿) → (◡𝐹 “ 𝑡) = (◡𝐹 “ 𝑡))
40		imaeq2 6007	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑡 → (◡𝐹 “ 𝑥) = (◡𝐹 “ 𝑡))
41	40	rspceeqv 3600	. . . . . . . . . . . 12 ⊢ ((𝑡 ∈ 𝐿 ∧ (◡𝐹 “ 𝑡) = (◡𝐹 “ 𝑡)) → ∃𝑥 ∈ 𝐿 (◡𝐹 “ 𝑡) = (◡𝐹 “ 𝑥))
42	38, 39, 41	syl2anc 584	. . . . . . . . . . 11 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑡 ∈ 𝐿) → ∃𝑥 ∈ 𝐿 (◡𝐹 “ 𝑡) = (◡𝐹 “ 𝑥))
43		simpl1 1192	. . . . . . . . . . . . . 14 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → 𝑌 ∈ 𝐴)
44		cnvimass 6033	. . . . . . . . . . . . . . . . 17 ⊢ (◡𝐹 “ 𝑡) ⊆ dom 𝐹
45		fdm 6661	. . . . . . . . . . . . . . . . 17 ⊢ (𝐹:𝑌⟶𝑋 → dom 𝐹 = 𝑌)
46	44, 45	sseqtrid 3978	. . . . . . . . . . . . . . . 16 ⊢ (𝐹:𝑌⟶𝑋 → (◡𝐹 “ 𝑡) ⊆ 𝑌)
47	46	3ad2ant3 1135	. . . . . . . . . . . . . . 15 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (◡𝐹 “ 𝑡) ⊆ 𝑌)
48	47	adantr 480	. . . . . . . . . . . . . 14 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (◡𝐹 “ 𝑡) ⊆ 𝑌)
49	43, 48	ssexd 5263	. . . . . . . . . . . . 13 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (◡𝐹 “ 𝑡) ∈ V)
50		eqid 2729	. . . . . . . . . . . . . 14 ⊢ (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) = (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))
51	50	elrnmpt 5900	. . . . . . . . . . . . 13 ⊢ ((◡𝐹 “ 𝑡) ∈ V → ((◡𝐹 “ 𝑡) ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ↔ ∃𝑥 ∈ 𝐿 (◡𝐹 “ 𝑡) = (◡𝐹 “ 𝑥)))
52	49, 51	syl 17	. . . . . . . . . . . 12 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → ((◡𝐹 “ 𝑡) ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ↔ ∃𝑥 ∈ 𝐿 (◡𝐹 “ 𝑡) = (◡𝐹 “ 𝑥)))
53	52	adantr 480	. . . . . . . . . . 11 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑡 ∈ 𝐿) → ((◡𝐹 “ 𝑡) ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ↔ ∃𝑥 ∈ 𝐿 (◡𝐹 “ 𝑡) = (◡𝐹 “ 𝑥)))
54	42, 53	mpbird 257	. . . . . . . . . 10 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑡 ∈ 𝐿) → (◡𝐹 “ 𝑡) ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)))
55		ssid 3958	. . . . . . . . . . 11 ⊢ (◡𝐹 “ 𝑡) ⊆ (◡𝐹 “ 𝑡)
56		ffun 6655	. . . . . . . . . . . . . 14 ⊢ (𝐹:𝑌⟶𝑋 → Fun 𝐹)
57	56	3ad2ant3 1135	. . . . . . . . . . . . 13 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → Fun 𝐹)
58	57	ad2antrr 726	. . . . . . . . . . . 12 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑡 ∈ 𝐿) → Fun 𝐹)
59		funimass3 6988	. . . . . . . . . . . 12 ⊢ ((Fun 𝐹 ∧ (◡𝐹 “ 𝑡) ⊆ dom 𝐹) → ((𝐹 “ (◡𝐹 “ 𝑡)) ⊆ 𝑡 ↔ (◡𝐹 “ 𝑡) ⊆ (◡𝐹 “ 𝑡)))
60	58, 44, 59	sylancl 586	. . . . . . . . . . 11 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑡 ∈ 𝐿) → ((𝐹 “ (◡𝐹 “ 𝑡)) ⊆ 𝑡 ↔ (◡𝐹 “ 𝑡) ⊆ (◡𝐹 “ 𝑡)))
61	55, 60	mpbiri 258	. . . . . . . . . 10 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑡 ∈ 𝐿) → (𝐹 “ (◡𝐹 “ 𝑡)) ⊆ 𝑡)
62		imaeq2 6007	. . . . . . . . . . . 12 ⊢ (𝑠 = (◡𝐹 “ 𝑡) → (𝐹 “ 𝑠) = (𝐹 “ (◡𝐹 “ 𝑡)))
63	62	sseq1d 3967	. . . . . . . . . . 11 ⊢ (𝑠 = (◡𝐹 “ 𝑡) → ((𝐹 “ 𝑠) ⊆ 𝑡 ↔ (𝐹 “ (◡𝐹 “ 𝑡)) ⊆ 𝑡))
64	63	rspcev 3577	. . . . . . . . . 10 ⊢ (((◡𝐹 “ 𝑡) ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ∧ (𝐹 “ (◡𝐹 “ 𝑡)) ⊆ 𝑡) → ∃𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))(𝐹 “ 𝑠) ⊆ 𝑡)
65	54, 61, 64	syl2anc 584	. . . . . . . . 9 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑡 ∈ 𝐿) → ∃𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))(𝐹 “ 𝑠) ⊆ 𝑡)
66	65	ex 412	. . . . . . . 8 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (𝑡 ∈ 𝐿 → ∃𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))(𝐹 “ 𝑠) ⊆ 𝑡))
67	37, 66	jcad 512	. . . . . . 7 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (𝑡 ∈ 𝐿 → (𝑡 ⊆ 𝑋 ∧ ∃𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))(𝐹 “ 𝑠) ⊆ 𝑡)))
68	34	adantr 480	. . . . . . . . . . 11 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ ((𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ∧ (𝐹 “ 𝑠) ⊆ 𝑡) ∧ 𝑡 ⊆ 𝑋)) → 𝐿 ∈ (Fil‘𝑋))
69	50	elrnmpt 5900	. . . . . . . . . . . . . 14 ⊢ (𝑠 ∈ V → (𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ↔ ∃𝑥 ∈ 𝐿 𝑠 = (◡𝐹 “ 𝑥)))
70	69	elv 3441	. . . . . . . . . . . . 13 ⊢ (𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ↔ ∃𝑥 ∈ 𝐿 𝑠 = (◡𝐹 “ 𝑥))
71		ssid 3958	. . . . . . . . . . . . . . . . . . . 20 ⊢ (◡𝐹 “ 𝑥) ⊆ (◡𝐹 “ 𝑥)
72	57	ad3antrrr 730	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → Fun 𝐹)
73		cnvimass 6033	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (◡𝐹 “ 𝑥) ⊆ dom 𝐹
74		funimass3 6988	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((Fun 𝐹 ∧ (◡𝐹 “ 𝑥) ⊆ dom 𝐹) → ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑥 ↔ (◡𝐹 “ 𝑥) ⊆ (◡𝐹 “ 𝑥)))
75	72, 73, 74	sylancl 586	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑥 ↔ (◡𝐹 “ 𝑥) ⊆ (◡𝐹 “ 𝑥)))
76	71, 75	mpbiri 258	. . . . . . . . . . . . . . . . . . 19 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑥)
77		imassrn 6022	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐹 “ (◡𝐹 “ 𝑥)) ⊆ ran 𝐹
78		ssin 4190	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑥 ∧ (𝐹 “ (◡𝐹 “ 𝑥)) ⊆ ran 𝐹) ↔ (𝐹 “ (◡𝐹 “ 𝑥)) ⊆ (𝑥 ∩ ran 𝐹))
79	76, 77, 78	sylanblc 589	. . . . . . . . . . . . . . . . . 18 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝐹 “ (◡𝐹 “ 𝑥)) ⊆ (𝑥 ∩ ran 𝐹))
80		elin 3919	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑧 ∈ (𝑥 ∩ ran 𝐹) ↔ (𝑧 ∈ 𝑥 ∧ 𝑧 ∈ ran 𝐹))
81		fvelrnb 6883	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝐹 Fn 𝑌 → (𝑧 ∈ ran 𝐹 ↔ ∃𝑦 ∈ 𝑌 (𝐹‘𝑦) = 𝑧))
82	10, 81	syl 17	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝐹:𝑌⟶𝑋 → (𝑧 ∈ ran 𝐹 ↔ ∃𝑦 ∈ 𝑌 (𝐹‘𝑦) = 𝑧))
83	82	3ad2ant3 1135	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (𝑧 ∈ ran 𝐹 ↔ ∃𝑦 ∈ 𝑌 (𝐹‘𝑦) = 𝑧))
84	83	ad3antrrr 730	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝑧 ∈ ran 𝐹 ↔ ∃𝑦 ∈ 𝑌 (𝐹‘𝑦) = 𝑧))
85	72	ad2antrr 726	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) ∧ 𝑦 ∈ 𝑌) ∧ (𝐹‘𝑦) ∈ 𝑥) → Fun 𝐹)
86	85, 73	jctir 520	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) ∧ 𝑦 ∈ 𝑌) ∧ (𝐹‘𝑦) ∈ 𝑥) → (Fun 𝐹 ∧ (◡𝐹 “ 𝑥) ⊆ dom 𝐹))
87	57	ad2antrr 726	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) → Fun 𝐹)
88	87	ad2antrr 726	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) ∧ 𝑦 ∈ 𝑌) → Fun 𝐹)
89	45	3ad2ant3 1135	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → dom 𝐹 = 𝑌)
90	89	ad3antrrr 730	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → dom 𝐹 = 𝑌)
91	90	eleq2d 2814	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝑦 ∈ dom 𝐹 ↔ 𝑦 ∈ 𝑌))
92	91	biimpar 477	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) ∧ 𝑦 ∈ 𝑌) → 𝑦 ∈ dom 𝐹)
93		fvimacnv 6987	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((Fun 𝐹 ∧ 𝑦 ∈ dom 𝐹) → ((𝐹‘𝑦) ∈ 𝑥 ↔ 𝑦 ∈ (◡𝐹 “ 𝑥)))
94	88, 92, 93	syl2anc 584	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) ∧ 𝑦 ∈ 𝑌) → ((𝐹‘𝑦) ∈ 𝑥 ↔ 𝑦 ∈ (◡𝐹 “ 𝑥)))
95	94	biimpa 476	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) ∧ 𝑦 ∈ 𝑌) ∧ (𝐹‘𝑦) ∈ 𝑥) → 𝑦 ∈ (◡𝐹 “ 𝑥))
96		funfvima2 7167	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((Fun 𝐹 ∧ (◡𝐹 “ 𝑥) ⊆ dom 𝐹) → (𝑦 ∈ (◡𝐹 “ 𝑥) → (𝐹‘𝑦) ∈ (𝐹 “ (◡𝐹 “ 𝑥))))
97	86, 95, 96	sylc 65	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) ∧ 𝑦 ∈ 𝑌) ∧ (𝐹‘𝑦) ∈ 𝑥) → (𝐹‘𝑦) ∈ (𝐹 “ (◡𝐹 “ 𝑥)))
98	97	ex 412	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) ∧ 𝑦 ∈ 𝑌) → ((𝐹‘𝑦) ∈ 𝑥 → (𝐹‘𝑦) ∈ (𝐹 “ (◡𝐹 “ 𝑥))))
99		eleq1 2816	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝐹‘𝑦) = 𝑧 → ((𝐹‘𝑦) ∈ 𝑥 ↔ 𝑧 ∈ 𝑥))
100		eleq1 2816	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝐹‘𝑦) = 𝑧 → ((𝐹‘𝑦) ∈ (𝐹 “ (◡𝐹 “ 𝑥)) ↔ 𝑧 ∈ (𝐹 “ (◡𝐹 “ 𝑥))))
101	99, 100	imbi12d 344	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((𝐹‘𝑦) = 𝑧 → (((𝐹‘𝑦) ∈ 𝑥 → (𝐹‘𝑦) ∈ (𝐹 “ (◡𝐹 “ 𝑥))) ↔ (𝑧 ∈ 𝑥 → 𝑧 ∈ (𝐹 “ (◡𝐹 “ 𝑥)))))
102	98, 101	syl5ibcom 245	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) ∧ 𝑦 ∈ 𝑌) → ((𝐹‘𝑦) = 𝑧 → (𝑧 ∈ 𝑥 → 𝑧 ∈ (𝐹 “ (◡𝐹 “ 𝑥)))))
103	102	rexlimdva 3130	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (∃𝑦 ∈ 𝑌 (𝐹‘𝑦) = 𝑧 → (𝑧 ∈ 𝑥 → 𝑧 ∈ (𝐹 “ (◡𝐹 “ 𝑥)))))
104	84, 103	sylbid 240	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝑧 ∈ ran 𝐹 → (𝑧 ∈ 𝑥 → 𝑧 ∈ (𝐹 “ (◡𝐹 “ 𝑥)))))
105	104	impcomd 411	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → ((𝑧 ∈ 𝑥 ∧ 𝑧 ∈ ran 𝐹) → 𝑧 ∈ (𝐹 “ (◡𝐹 “ 𝑥))))
106	80, 105	biimtrid 242	. . . . . . . . . . . . . . . . . . 19 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝑧 ∈ (𝑥 ∩ ran 𝐹) → 𝑧 ∈ (𝐹 “ (◡𝐹 “ 𝑥))))
107	106	ssrdv 3941	. . . . . . . . . . . . . . . . . 18 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝑥 ∩ ran 𝐹) ⊆ (𝐹 “ (◡𝐹 “ 𝑥)))
108	79, 107	eqssd 3953	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝐹 “ (◡𝐹 “ 𝑥)) = (𝑥 ∩ ran 𝐹))
109		filin 23739	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝐿 ∈ (Fil‘𝑋) ∧ 𝑥 ∈ 𝐿 ∧ ran 𝐹 ∈ 𝐿) → (𝑥 ∩ ran 𝐹) ∈ 𝐿)
110	109	3exp 1119	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝐿 ∈ (Fil‘𝑋) → (𝑥 ∈ 𝐿 → (ran 𝐹 ∈ 𝐿 → (𝑥 ∩ ran 𝐹) ∈ 𝐿)))
111	110	com23 86	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐿 ∈ (Fil‘𝑋) → (ran 𝐹 ∈ 𝐿 → (𝑥 ∈ 𝐿 → (𝑥 ∩ ran 𝐹) ∈ 𝐿)))
112	111	3ad2ant2 1134	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (ran 𝐹 ∈ 𝐿 → (𝑥 ∈ 𝐿 → (𝑥 ∩ ran 𝐹) ∈ 𝐿)))
113	112	imp31 417	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) → (𝑥 ∩ ran 𝐹) ∈ 𝐿)
114	113	adantr 480	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝑥 ∩ ran 𝐹) ∈ 𝐿)
115	108, 114	eqeltrd 2828	. . . . . . . . . . . . . . . 16 ⊢ (((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) ∧ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 ∧ 𝑡 ⊆ 𝑋)) → (𝐹 “ (◡𝐹 “ 𝑥)) ∈ 𝐿)
116	115	exp32 420	. . . . . . . . . . . . . . 15 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) → ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 → (𝑡 ⊆ 𝑋 → (𝐹 “ (◡𝐹 “ 𝑥)) ∈ 𝐿)))
117		imaeq2 6007	. . . . . . . . . . . . . . . . 17 ⊢ (𝑠 = (◡𝐹 “ 𝑥) → (𝐹 “ 𝑠) = (𝐹 “ (◡𝐹 “ 𝑥)))
118	117	sseq1d 3967	. . . . . . . . . . . . . . . 16 ⊢ (𝑠 = (◡𝐹 “ 𝑥) → ((𝐹 “ 𝑠) ⊆ 𝑡 ↔ (𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡))
119	117	eleq1d 2813	. . . . . . . . . . . . . . . . 17 ⊢ (𝑠 = (◡𝐹 “ 𝑥) → ((𝐹 “ 𝑠) ∈ 𝐿 ↔ (𝐹 “ (◡𝐹 “ 𝑥)) ∈ 𝐿))
120	119	imbi2d 340	. . . . . . . . . . . . . . . 16 ⊢ (𝑠 = (◡𝐹 “ 𝑥) → ((𝑡 ⊆ 𝑋 → (𝐹 “ 𝑠) ∈ 𝐿) ↔ (𝑡 ⊆ 𝑋 → (𝐹 “ (◡𝐹 “ 𝑥)) ∈ 𝐿)))
121	118, 120	imbi12d 344	. . . . . . . . . . . . . . 15 ⊢ (𝑠 = (◡𝐹 “ 𝑥) → (((𝐹 “ 𝑠) ⊆ 𝑡 → (𝑡 ⊆ 𝑋 → (𝐹 “ 𝑠) ∈ 𝐿)) ↔ ((𝐹 “ (◡𝐹 “ 𝑥)) ⊆ 𝑡 → (𝑡 ⊆ 𝑋 → (𝐹 “ (◡𝐹 “ 𝑥)) ∈ 𝐿))))
122	116, 121	syl5ibrcom 247	. . . . . . . . . . . . . 14 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ 𝑥 ∈ 𝐿) → (𝑠 = (◡𝐹 “ 𝑥) → ((𝐹 “ 𝑠) ⊆ 𝑡 → (𝑡 ⊆ 𝑋 → (𝐹 “ 𝑠) ∈ 𝐿))))
123	122	rexlimdva 3130	. . . . . . . . . . . . 13 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (∃𝑥 ∈ 𝐿 𝑠 = (◡𝐹 “ 𝑥) → ((𝐹 “ 𝑠) ⊆ 𝑡 → (𝑡 ⊆ 𝑋 → (𝐹 “ 𝑠) ∈ 𝐿))))
124	70, 123	biimtrid 242	. . . . . . . . . . . 12 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) → ((𝐹 “ 𝑠) ⊆ 𝑡 → (𝑡 ⊆ 𝑋 → (𝐹 “ 𝑠) ∈ 𝐿))))
125	124	imp44 428	. . . . . . . . . . 11 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ ((𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ∧ (𝐹 “ 𝑠) ⊆ 𝑡) ∧ 𝑡 ⊆ 𝑋)) → (𝐹 “ 𝑠) ∈ 𝐿)
126		simprr 772	. . . . . . . . . . 11 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ ((𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ∧ (𝐹 “ 𝑠) ⊆ 𝑡) ∧ 𝑡 ⊆ 𝑋)) → 𝑡 ⊆ 𝑋)
127		simprlr 779	. . . . . . . . . . 11 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ ((𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ∧ (𝐹 “ 𝑠) ⊆ 𝑡) ∧ 𝑡 ⊆ 𝑋)) → (𝐹 “ 𝑠) ⊆ 𝑡)
128		filss 23738	. . . . . . . . . . 11 ⊢ ((𝐿 ∈ (Fil‘𝑋) ∧ ((𝐹 “ 𝑠) ∈ 𝐿 ∧ 𝑡 ⊆ 𝑋 ∧ (𝐹 “ 𝑠) ⊆ 𝑡)) → 𝑡 ∈ 𝐿)
129	68, 125, 126, 127, 128	syl13anc 1374	. . . . . . . . . 10 ⊢ ((((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) ∧ ((𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ∧ (𝐹 “ 𝑠) ⊆ 𝑡) ∧ 𝑡 ⊆ 𝑋)) → 𝑡 ∈ 𝐿)
130	129	exp44 437	. . . . . . . . 9 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) → ((𝐹 “ 𝑠) ⊆ 𝑡 → (𝑡 ⊆ 𝑋 → 𝑡 ∈ 𝐿))))
131	130	rexlimdv 3128	. . . . . . . 8 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (∃𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))(𝐹 “ 𝑠) ⊆ 𝑡 → (𝑡 ⊆ 𝑋 → 𝑡 ∈ 𝐿)))
132	131	impcomd 411	. . . . . . 7 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → ((𝑡 ⊆ 𝑋 ∧ ∃𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))(𝐹 “ 𝑠) ⊆ 𝑡) → 𝑡 ∈ 𝐿))
133	67, 132	impbid 212	. . . . . 6 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (𝑡 ∈ 𝐿 ↔ (𝑡 ⊆ 𝑋 ∧ ∃𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))(𝐹 “ 𝑠) ⊆ 𝑡)))
134	2	adantr 480	. . . . . . 7 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → 𝑋 ∈ 𝐿)
135		rnelfmlem 23837	. . . . . . 7 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ∈ (fBas‘𝑌))
136		simpl3 1194	. . . . . . 7 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → 𝐹:𝑌⟶𝑋)
137		elfm 23832	. . . . . . 7 ⊢ ((𝑋 ∈ 𝐿 ∧ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ∈ (fBas‘𝑌) ∧ 𝐹:𝑌⟶𝑋) → (𝑡 ∈ ((𝑋 FilMap 𝐹)‘ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))) ↔ (𝑡 ⊆ 𝑋 ∧ ∃𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))(𝐹 “ 𝑠) ⊆ 𝑡)))
138	134, 135, 136, 137	syl3anc 1373	. . . . . 6 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (𝑡 ∈ ((𝑋 FilMap 𝐹)‘ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))) ↔ (𝑡 ⊆ 𝑋 ∧ ∃𝑠 ∈ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))(𝐹 “ 𝑠) ⊆ 𝑡)))
139	133, 138	bitr4d 282	. . . . 5 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (𝑡 ∈ 𝐿 ↔ 𝑡 ∈ ((𝑋 FilMap 𝐹)‘ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)))))
140	139	eqrdv 2727	. . . 4 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → 𝐿 = ((𝑋 FilMap 𝐹)‘ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))))
141	7	adantr 480	. . . . 5 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → (𝑋 FilMap 𝐹) Fn (fBas‘𝑌))
142		fnfvelrn 7014	. . . . 5 ⊢ (((𝑋 FilMap 𝐹) Fn (fBas‘𝑌) ∧ ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥)) ∈ (fBas‘𝑌)) → ((𝑋 FilMap 𝐹)‘ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))) ∈ ran (𝑋 FilMap 𝐹))
143	141, 135, 142	syl2anc 584	. . . 4 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → ((𝑋 FilMap 𝐹)‘ran (𝑥 ∈ 𝐿 ↦ (◡𝐹 “ 𝑥))) ∈ ran (𝑋 FilMap 𝐹))
144	140, 143	eqeltrd 2828	. . 3 ⊢ (((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) ∧ ran 𝐹 ∈ 𝐿) → 𝐿 ∈ ran (𝑋 FilMap 𝐹))
145	144	ex 412	. 2 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (ran 𝐹 ∈ 𝐿 → 𝐿 ∈ ran (𝑋 FilMap 𝐹)))
146	33, 145	impbid 212	1 ⊢ ((𝑌 ∈ 𝐴 ∧ 𝐿 ∈ (Fil‘𝑋) ∧ 𝐹:𝑌⟶𝑋) → (𝐿 ∈ ran (𝑋 FilMap 𝐹) ↔ ran 𝐹 ∈ 𝐿))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   = wceq 1540   ∈ wcel 2109  ∃wrex 3053  Vcvv 3436   ∩ cin 3902   ⊆ wss 3903   ↦ cmpt 5173  ^◡ccnv 5618  dom cdm 5619  ran crn 5620   “ cima 5622  Fun wfun 6476   Fn wfn 6477  ⟶wf 6478  –onto→wfo 6480  ‘cfv 6482  (class class class)co 7349  fBascfbas 21249  filGencfg 21250  Filcfil 23730   FilMap cfm 23818

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 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5218  ax-sep 5235  ax-nul 5245  ax-pow 5304  ax-pr 5371  ax-un 7671

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-nel 3030  df-ral 3045  df-rex 3054  df-reu 3344  df-rab 3395  df-v 3438  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4285  df-if 4477  df-pw 4553  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4859  df-iun 4943  df-br 5093  df-opab 5155  df-mpt 5174  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-iota 6438  df-fun 6484  df-fn 6485  df-f 6486  df-f1 6487  df-fo 6488  df-f1o 6489  df-fv 6490  df-ov 7352  df-oprab 7353  df-mpo 7354  df-fbas 21258  df-fg 21259  df-fil 23731  df-fm 23823

This theorem is referenced by: (None)