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Theorem fbasrn 21669
Description: Given a filter on a domain, produce a filter on the range. (Contributed by Jeff Hankins, 7-Sep-2009.) (Revised by Stefan O'Rear, 6-Aug-2015.)
Hypothesis
Ref Expression
fbasrn.c 𝐶 = ran (𝑥𝐵 ↦ (𝐹𝑥))
Assertion
Ref Expression
fbasrn ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → 𝐶 ∈ (fBas‘𝑌))
Distinct variable groups:   𝑥,𝐵   𝑥,𝐹   𝑥,𝑉   𝑥,𝑋   𝑥,𝑌
Allowed substitution hint:   𝐶(𝑥)

Proof of Theorem fbasrn
Dummy variables 𝑠 𝑟 𝑢 𝑣 𝑤 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fbasrn.c . . 3 𝐶 = ran (𝑥𝐵 ↦ (𝐹𝑥))
2 simpl2 1063 . . . . . . 7 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝐵) → 𝐹:𝑋𝑌)
3 imassrn 5465 . . . . . . . 8 (𝐹𝑥) ⊆ ran 𝐹
4 frn 6040 . . . . . . . 8 (𝐹:𝑋𝑌 → ran 𝐹𝑌)
53, 4syl5ss 3606 . . . . . . 7 (𝐹:𝑋𝑌 → (𝐹𝑥) ⊆ 𝑌)
62, 5syl 17 . . . . . 6 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝐵) → (𝐹𝑥) ⊆ 𝑌)
7 simpl3 1064 . . . . . . 7 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝐵) → 𝑌𝑉)
8 elpw2g 4818 . . . . . . 7 (𝑌𝑉 → ((𝐹𝑥) ∈ 𝒫 𝑌 ↔ (𝐹𝑥) ⊆ 𝑌))
97, 8syl 17 . . . . . 6 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝐵) → ((𝐹𝑥) ∈ 𝒫 𝑌 ↔ (𝐹𝑥) ⊆ 𝑌))
106, 9mpbird 247 . . . . 5 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝐵) → (𝐹𝑥) ∈ 𝒫 𝑌)
11 eqid 2620 . . . . 5 (𝑥𝐵 ↦ (𝐹𝑥)) = (𝑥𝐵 ↦ (𝐹𝑥))
1210, 11fmptd 6371 . . . 4 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → (𝑥𝐵 ↦ (𝐹𝑥)):𝐵⟶𝒫 𝑌)
13 frn 6040 . . . 4 ((𝑥𝐵 ↦ (𝐹𝑥)):𝐵⟶𝒫 𝑌 → ran (𝑥𝐵 ↦ (𝐹𝑥)) ⊆ 𝒫 𝑌)
1412, 13syl 17 . . 3 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ran (𝑥𝐵 ↦ (𝐹𝑥)) ⊆ 𝒫 𝑌)
151, 14syl5eqss 3641 . 2 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → 𝐶 ⊆ 𝒫 𝑌)
161a1i 11 . . . 4 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → 𝐶 = ran (𝑥𝐵 ↦ (𝐹𝑥)))
17 ffun 6035 . . . . . . . 8 (𝐹:𝑋𝑌 → Fun 𝐹)
18173ad2ant2 1081 . . . . . . 7 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → Fun 𝐹)
19 funimaexg 5963 . . . . . . . 8 ((Fun 𝐹𝑥𝐵) → (𝐹𝑥) ∈ V)
2019ralrimiva 2963 . . . . . . 7 (Fun 𝐹 → ∀𝑥𝐵 (𝐹𝑥) ∈ V)
21 dmmptg 5620 . . . . . . 7 (∀𝑥𝐵 (𝐹𝑥) ∈ V → dom (𝑥𝐵 ↦ (𝐹𝑥)) = 𝐵)
2218, 20, 213syl 18 . . . . . 6 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → dom (𝑥𝐵 ↦ (𝐹𝑥)) = 𝐵)
23 fbasne0 21615 . . . . . . 7 (𝐵 ∈ (fBas‘𝑋) → 𝐵 ≠ ∅)
24233ad2ant1 1080 . . . . . 6 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → 𝐵 ≠ ∅)
2522, 24eqnetrd 2858 . . . . 5 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → dom (𝑥𝐵 ↦ (𝐹𝑥)) ≠ ∅)
26 dm0rn0 5331 . . . . . 6 (dom (𝑥𝐵 ↦ (𝐹𝑥)) = ∅ ↔ ran (𝑥𝐵 ↦ (𝐹𝑥)) = ∅)
2726necon3bii 2843 . . . . 5 (dom (𝑥𝐵 ↦ (𝐹𝑥)) ≠ ∅ ↔ ran (𝑥𝐵 ↦ (𝐹𝑥)) ≠ ∅)
2825, 27sylib 208 . . . 4 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ran (𝑥𝐵 ↦ (𝐹𝑥)) ≠ ∅)
2916, 28eqnetrd 2858 . . 3 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → 𝐶 ≠ ∅)
30 fbelss 21618 . . . . . . . . 9 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝑥𝐵) → 𝑥𝑋)
3130ex 450 . . . . . . . 8 (𝐵 ∈ (fBas‘𝑋) → (𝑥𝐵𝑥𝑋))
32313ad2ant1 1080 . . . . . . 7 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → (𝑥𝐵𝑥𝑋))
33 0nelfb 21616 . . . . . . . . . 10 (𝐵 ∈ (fBas‘𝑋) → ¬ ∅ ∈ 𝐵)
34 eleq1 2687 . . . . . . . . . . 11 (𝑥 = ∅ → (𝑥𝐵 ↔ ∅ ∈ 𝐵))
3534notbid 308 . . . . . . . . . 10 (𝑥 = ∅ → (¬ 𝑥𝐵 ↔ ¬ ∅ ∈ 𝐵))
3633, 35syl5ibrcom 237 . . . . . . . . 9 (𝐵 ∈ (fBas‘𝑋) → (𝑥 = ∅ → ¬ 𝑥𝐵))
3736con2d 129 . . . . . . . 8 (𝐵 ∈ (fBas‘𝑋) → (𝑥𝐵 → ¬ 𝑥 = ∅))
38373ad2ant1 1080 . . . . . . 7 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → (𝑥𝐵 → ¬ 𝑥 = ∅))
3932, 38jcad 555 . . . . . 6 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → (𝑥𝐵 → (𝑥𝑋 ∧ ¬ 𝑥 = ∅)))
40 fdm 6038 . . . . . . . . . . . . . . 15 (𝐹:𝑋𝑌 → dom 𝐹 = 𝑋)
41403ad2ant2 1081 . . . . . . . . . . . . . 14 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → dom 𝐹 = 𝑋)
4241sseq2d 3625 . . . . . . . . . . . . 13 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → (𝑥 ⊆ dom 𝐹𝑥𝑋))
4342biimpar 502 . . . . . . . . . . . 12 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝑋) → 𝑥 ⊆ dom 𝐹)
44 sseqin2 3809 . . . . . . . . . . . 12 (𝑥 ⊆ dom 𝐹 ↔ (dom 𝐹𝑥) = 𝑥)
4543, 44sylib 208 . . . . . . . . . . 11 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝑋) → (dom 𝐹𝑥) = 𝑥)
4645eqeq1d 2622 . . . . . . . . . 10 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝑋) → ((dom 𝐹𝑥) = ∅ ↔ 𝑥 = ∅))
4746biimpd 219 . . . . . . . . 9 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝑋) → ((dom 𝐹𝑥) = ∅ → 𝑥 = ∅))
4847con3d 148 . . . . . . . 8 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ 𝑥𝑋) → (¬ 𝑥 = ∅ → ¬ (dom 𝐹𝑥) = ∅))
4948expimpd 628 . . . . . . 7 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ((𝑥𝑋 ∧ ¬ 𝑥 = ∅) → ¬ (dom 𝐹𝑥) = ∅))
50 eqcom 2627 . . . . . . . . 9 (∅ = (𝐹𝑥) ↔ (𝐹𝑥) = ∅)
51 imadisj 5472 . . . . . . . . 9 ((𝐹𝑥) = ∅ ↔ (dom 𝐹𝑥) = ∅)
5250, 51bitri 264 . . . . . . . 8 (∅ = (𝐹𝑥) ↔ (dom 𝐹𝑥) = ∅)
5352notbii 310 . . . . . . 7 (¬ ∅ = (𝐹𝑥) ↔ ¬ (dom 𝐹𝑥) = ∅)
5449, 53syl6ibr 242 . . . . . 6 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ((𝑥𝑋 ∧ ¬ 𝑥 = ∅) → ¬ ∅ = (𝐹𝑥)))
5539, 54syld 47 . . . . 5 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → (𝑥𝐵 → ¬ ∅ = (𝐹𝑥)))
5655ralrimiv 2962 . . . 4 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ∀𝑥𝐵 ¬ ∅ = (𝐹𝑥))
571eleq2i 2691 . . . . . . 7 (∅ ∈ 𝐶 ↔ ∅ ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)))
58 0ex 4781 . . . . . . . 8 ∅ ∈ V
5911elrnmpt 5361 . . . . . . . 8 (∅ ∈ V → (∅ ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)) ↔ ∃𝑥𝐵 ∅ = (𝐹𝑥)))
6058, 59ax-mp 5 . . . . . . 7 (∅ ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)) ↔ ∃𝑥𝐵 ∅ = (𝐹𝑥))
6157, 60bitri 264 . . . . . 6 (∅ ∈ 𝐶 ↔ ∃𝑥𝐵 ∅ = (𝐹𝑥))
6261notbii 310 . . . . 5 (¬ ∅ ∈ 𝐶 ↔ ¬ ∃𝑥𝐵 ∅ = (𝐹𝑥))
63 df-nel 2895 . . . . 5 (∅ ∉ 𝐶 ↔ ¬ ∅ ∈ 𝐶)
64 ralnex 2989 . . . . 5 (∀𝑥𝐵 ¬ ∅ = (𝐹𝑥) ↔ ¬ ∃𝑥𝐵 ∅ = (𝐹𝑥))
6562, 63, 643bitr4i 292 . . . 4 (∅ ∉ 𝐶 ↔ ∀𝑥𝐵 ¬ ∅ = (𝐹𝑥))
6656, 65sylibr 224 . . 3 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ∅ ∉ 𝐶)
671eleq2i 2691 . . . . . . . 8 (𝑟𝐶𝑟 ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)))
68 vex 3198 . . . . . . . . 9 𝑟 ∈ V
69 imaeq2 5450 . . . . . . . . . . 11 (𝑥 = 𝑢 → (𝐹𝑥) = (𝐹𝑢))
7069cbvmptv 4741 . . . . . . . . . 10 (𝑥𝐵 ↦ (𝐹𝑥)) = (𝑢𝐵 ↦ (𝐹𝑢))
7170elrnmpt 5361 . . . . . . . . 9 (𝑟 ∈ V → (𝑟 ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)) ↔ ∃𝑢𝐵 𝑟 = (𝐹𝑢)))
7268, 71ax-mp 5 . . . . . . . 8 (𝑟 ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)) ↔ ∃𝑢𝐵 𝑟 = (𝐹𝑢))
7367, 72bitri 264 . . . . . . 7 (𝑟𝐶 ↔ ∃𝑢𝐵 𝑟 = (𝐹𝑢))
741eleq2i 2691 . . . . . . . 8 (𝑠𝐶𝑠 ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)))
75 vex 3198 . . . . . . . . 9 𝑠 ∈ V
76 imaeq2 5450 . . . . . . . . . . 11 (𝑥 = 𝑣 → (𝐹𝑥) = (𝐹𝑣))
7776cbvmptv 4741 . . . . . . . . . 10 (𝑥𝐵 ↦ (𝐹𝑥)) = (𝑣𝐵 ↦ (𝐹𝑣))
7877elrnmpt 5361 . . . . . . . . 9 (𝑠 ∈ V → (𝑠 ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)) ↔ ∃𝑣𝐵 𝑠 = (𝐹𝑣)))
7975, 78ax-mp 5 . . . . . . . 8 (𝑠 ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)) ↔ ∃𝑣𝐵 𝑠 = (𝐹𝑣))
8074, 79bitri 264 . . . . . . 7 (𝑠𝐶 ↔ ∃𝑣𝐵 𝑠 = (𝐹𝑣))
8173, 80anbi12i 732 . . . . . 6 ((𝑟𝐶𝑠𝐶) ↔ (∃𝑢𝐵 𝑟 = (𝐹𝑢) ∧ ∃𝑣𝐵 𝑠 = (𝐹𝑣)))
82 reeanv 3102 . . . . . 6 (∃𝑢𝐵𝑣𝐵 (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣)) ↔ (∃𝑢𝐵 𝑟 = (𝐹𝑢) ∧ ∃𝑣𝐵 𝑠 = (𝐹𝑣)))
8381, 82bitr4i 267 . . . . 5 ((𝑟𝐶𝑠𝐶) ↔ ∃𝑢𝐵𝑣𝐵 (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣)))
84 fbasssin 21621 . . . . . . . . . . 11 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝑢𝐵𝑣𝐵) → ∃𝑤𝐵 𝑤 ⊆ (𝑢𝑣))
85843expb 1264 . . . . . . . . . 10 ((𝐵 ∈ (fBas‘𝑋) ∧ (𝑢𝐵𝑣𝐵)) → ∃𝑤𝐵 𝑤 ⊆ (𝑢𝑣))
86853ad2antl1 1221 . . . . . . . . 9 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ (𝑢𝐵𝑣𝐵)) → ∃𝑤𝐵 𝑤 ⊆ (𝑢𝑣))
8786adantrr 752 . . . . . . . 8 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ ((𝑢𝐵𝑣𝐵) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣)))) → ∃𝑤𝐵 𝑤 ⊆ (𝑢𝑣))
88 eqid 2620 . . . . . . . . . . . . 13 (𝐹𝑤) = (𝐹𝑤)
89 imaeq2 5450 . . . . . . . . . . . . . . 15 (𝑥 = 𝑤 → (𝐹𝑥) = (𝐹𝑤))
9089eqeq2d 2630 . . . . . . . . . . . . . 14 (𝑥 = 𝑤 → ((𝐹𝑤) = (𝐹𝑥) ↔ (𝐹𝑤) = (𝐹𝑤)))
9190rspcev 3304 . . . . . . . . . . . . 13 ((𝑤𝐵 ∧ (𝐹𝑤) = (𝐹𝑤)) → ∃𝑥𝐵 (𝐹𝑤) = (𝐹𝑥))
9288, 91mpan2 706 . . . . . . . . . . . 12 (𝑤𝐵 → ∃𝑥𝐵 (𝐹𝑤) = (𝐹𝑥))
9392ad2antrl 763 . . . . . . . . . . 11 ((((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣))) ∧ (𝑤𝐵𝑤 ⊆ (𝑢𝑣))) → ∃𝑥𝐵 (𝐹𝑤) = (𝐹𝑥))
941eleq2i 2691 . . . . . . . . . . . . 13 ((𝐹𝑤) ∈ 𝐶 ↔ (𝐹𝑤) ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)))
95 vex 3198 . . . . . . . . . . . . . . 15 𝑤 ∈ V
9695funimaex 5964 . . . . . . . . . . . . . 14 (Fun 𝐹 → (𝐹𝑤) ∈ V)
9711elrnmpt 5361 . . . . . . . . . . . . . 14 ((𝐹𝑤) ∈ V → ((𝐹𝑤) ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)) ↔ ∃𝑥𝐵 (𝐹𝑤) = (𝐹𝑥)))
9818, 96, 973syl 18 . . . . . . . . . . . . 13 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ((𝐹𝑤) ∈ ran (𝑥𝐵 ↦ (𝐹𝑥)) ↔ ∃𝑥𝐵 (𝐹𝑤) = (𝐹𝑥)))
9994, 98syl5bb 272 . . . . . . . . . . . 12 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ((𝐹𝑤) ∈ 𝐶 ↔ ∃𝑥𝐵 (𝐹𝑤) = (𝐹𝑥)))
10099ad2antrr 761 . . . . . . . . . . 11 ((((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣))) ∧ (𝑤𝐵𝑤 ⊆ (𝑢𝑣))) → ((𝐹𝑤) ∈ 𝐶 ↔ ∃𝑥𝐵 (𝐹𝑤) = (𝐹𝑥)))
10193, 100mpbird 247 . . . . . . . . . 10 ((((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣))) ∧ (𝑤𝐵𝑤 ⊆ (𝑢𝑣))) → (𝐹𝑤) ∈ 𝐶)
102 imass2 5489 . . . . . . . . . . . 12 (𝑤 ⊆ (𝑢𝑣) → (𝐹𝑤) ⊆ (𝐹 “ (𝑢𝑣)))
103102ad2antll 764 . . . . . . . . . . 11 ((((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣))) ∧ (𝑤𝐵𝑤 ⊆ (𝑢𝑣))) → (𝐹𝑤) ⊆ (𝐹 “ (𝑢𝑣)))
104 inss1 3825 . . . . . . . . . . . . . 14 (𝑢𝑣) ⊆ 𝑢
105 imass2 5489 . . . . . . . . . . . . . 14 ((𝑢𝑣) ⊆ 𝑢 → (𝐹 “ (𝑢𝑣)) ⊆ (𝐹𝑢))
106104, 105ax-mp 5 . . . . . . . . . . . . 13 (𝐹 “ (𝑢𝑣)) ⊆ (𝐹𝑢)
107 inss2 3826 . . . . . . . . . . . . . 14 (𝑢𝑣) ⊆ 𝑣
108 imass2 5489 . . . . . . . . . . . . . 14 ((𝑢𝑣) ⊆ 𝑣 → (𝐹 “ (𝑢𝑣)) ⊆ (𝐹𝑣))
109107, 108ax-mp 5 . . . . . . . . . . . . 13 (𝐹 “ (𝑢𝑣)) ⊆ (𝐹𝑣)
110106, 109ssini 3828 . . . . . . . . . . . 12 (𝐹 “ (𝑢𝑣)) ⊆ ((𝐹𝑢) ∩ (𝐹𝑣))
111 ineq12 3801 . . . . . . . . . . . . 13 ((𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣)) → (𝑟𝑠) = ((𝐹𝑢) ∩ (𝐹𝑣)))
112111ad2antlr 762 . . . . . . . . . . . 12 ((((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣))) ∧ (𝑤𝐵𝑤 ⊆ (𝑢𝑣))) → (𝑟𝑠) = ((𝐹𝑢) ∩ (𝐹𝑣)))
113110, 112syl5sseqr 3646 . . . . . . . . . . 11 ((((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣))) ∧ (𝑤𝐵𝑤 ⊆ (𝑢𝑣))) → (𝐹 “ (𝑢𝑣)) ⊆ (𝑟𝑠))
114103, 113sstrd 3605 . . . . . . . . . 10 ((((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣))) ∧ (𝑤𝐵𝑤 ⊆ (𝑢𝑣))) → (𝐹𝑤) ⊆ (𝑟𝑠))
115 sseq1 3618 . . . . . . . . . . 11 (𝑧 = (𝐹𝑤) → (𝑧 ⊆ (𝑟𝑠) ↔ (𝐹𝑤) ⊆ (𝑟𝑠)))
116115rspcev 3304 . . . . . . . . . 10 (((𝐹𝑤) ∈ 𝐶 ∧ (𝐹𝑤) ⊆ (𝑟𝑠)) → ∃𝑧𝐶 𝑧 ⊆ (𝑟𝑠))
117101, 114, 116syl2anc 692 . . . . . . . . 9 ((((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣))) ∧ (𝑤𝐵𝑤 ⊆ (𝑢𝑣))) → ∃𝑧𝐶 𝑧 ⊆ (𝑟𝑠))
118117adantlrl 755 . . . . . . . 8 ((((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ ((𝑢𝐵𝑣𝐵) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣)))) ∧ (𝑤𝐵𝑤 ⊆ (𝑢𝑣))) → ∃𝑧𝐶 𝑧 ⊆ (𝑟𝑠))
11987, 118rexlimddv 3031 . . . . . . 7 (((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) ∧ ((𝑢𝐵𝑣𝐵) ∧ (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣)))) → ∃𝑧𝐶 𝑧 ⊆ (𝑟𝑠))
120119exp32 630 . . . . . 6 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ((𝑢𝐵𝑣𝐵) → ((𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣)) → ∃𝑧𝐶 𝑧 ⊆ (𝑟𝑠))))
121120rexlimdvv 3033 . . . . 5 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → (∃𝑢𝐵𝑣𝐵 (𝑟 = (𝐹𝑢) ∧ 𝑠 = (𝐹𝑣)) → ∃𝑧𝐶 𝑧 ⊆ (𝑟𝑠)))
12283, 121syl5bi 232 . . . 4 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ((𝑟𝐶𝑠𝐶) → ∃𝑧𝐶 𝑧 ⊆ (𝑟𝑠)))
123122ralrimivv 2967 . . 3 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → ∀𝑟𝐶𝑠𝐶𝑧𝐶 𝑧 ⊆ (𝑟𝑠))
12429, 66, 1233jca 1240 . 2 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → (𝐶 ≠ ∅ ∧ ∅ ∉ 𝐶 ∧ ∀𝑟𝐶𝑠𝐶𝑧𝐶 𝑧 ⊆ (𝑟𝑠)))
125 isfbas2 21620 . . 3 (𝑌𝑉 → (𝐶 ∈ (fBas‘𝑌) ↔ (𝐶 ⊆ 𝒫 𝑌 ∧ (𝐶 ≠ ∅ ∧ ∅ ∉ 𝐶 ∧ ∀𝑟𝐶𝑠𝐶𝑧𝐶 𝑧 ⊆ (𝑟𝑠)))))
1261253ad2ant3 1082 . 2 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → (𝐶 ∈ (fBas‘𝑌) ↔ (𝐶 ⊆ 𝒫 𝑌 ∧ (𝐶 ≠ ∅ ∧ ∅ ∉ 𝐶 ∧ ∀𝑟𝐶𝑠𝐶𝑧𝐶 𝑧 ⊆ (𝑟𝑠)))))
12715, 124, 126mpbir2and 956 1 ((𝐵 ∈ (fBas‘𝑋) ∧ 𝐹:𝑋𝑌𝑌𝑉) → 𝐶 ∈ (fBas‘𝑌))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 384  w3a 1036   = wceq 1481  wcel 1988  wne 2791  wnel 2894  wral 2909  wrex 2910  Vcvv 3195  cin 3566  wss 3567  c0 3907  𝒫 cpw 4149  cmpt 4720  dom cdm 5104  ran crn 5105  cima 5107  Fun wfun 5870  wf 5872  cfv 5876  fBascfbas 19715
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1720  ax-4 1735  ax-5 1837  ax-6 1886  ax-7 1933  ax-8 1990  ax-9 1997  ax-10 2017  ax-11 2032  ax-12 2045  ax-13 2244  ax-ext 2600  ax-rep 4762  ax-sep 4772  ax-nul 4780  ax-pow 4834  ax-pr 4897
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1484  df-ex 1703  df-nf 1708  df-sb 1879  df-eu 2472  df-mo 2473  df-clab 2607  df-cleq 2613  df-clel 2616  df-nfc 2751  df-ne 2792  df-nel 2895  df-ral 2914  df-rex 2915  df-rab 2918  df-v 3197  df-sbc 3430  df-csb 3527  df-dif 3570  df-un 3572  df-in 3574  df-ss 3581  df-nul 3908  df-if 4078  df-pw 4151  df-sn 4169  df-pr 4171  df-op 4175  df-uni 4428  df-br 4645  df-opab 4704  df-mpt 4721  df-id 5014  df-xp 5110  df-rel 5111  df-cnv 5112  df-co 5113  df-dm 5114  df-rn 5115  df-res 5116  df-ima 5117  df-iota 5839  df-fun 5878  df-fn 5879  df-f 5880  df-fv 5884  df-fbas 19724
This theorem is referenced by:  fmfil  21729  fmss  21731  elfm  21732  fmucnd  22077  fmcfil  23051
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