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Mirrors > Home > MPE Home > Th. List > uzfbas | Structured version Visualization version GIF version |
Description: The set of upper sets of integers based at a point in a fixed upper integer set like ℕ is a filter base on ℕ, which corresponds to convergence of sequences on ℕ. (Contributed by Mario Carneiro, 13-Oct-2015.) |
Ref | Expression |
---|---|
uzfbas.1 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
Ref | Expression |
---|---|
uzfbas | ⊢ (𝑀 ∈ ℤ → (ℤ≥ “ 𝑍) ∈ (fBas‘𝑍)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uzfbas.1 | . . 3 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
2 | 1 | uzrest 23048 | . 2 ⊢ (𝑀 ∈ ℤ → (ran ℤ≥ ↾t 𝑍) = (ℤ≥ “ 𝑍)) |
3 | zfbas 23047 | . . . . 5 ⊢ ran ℤ≥ ∈ (fBas‘ℤ) | |
4 | 0nelfb 22982 | . . . . 5 ⊢ (ran ℤ≥ ∈ (fBas‘ℤ) → ¬ ∅ ∈ ran ℤ≥) | |
5 | 3, 4 | ax-mp 5 | . . . 4 ⊢ ¬ ∅ ∈ ran ℤ≥ |
6 | imassrn 5980 | . . . . . 6 ⊢ (ℤ≥ “ 𝑍) ⊆ ran ℤ≥ | |
7 | 2, 6 | eqsstrdi 3975 | . . . . 5 ⊢ (𝑀 ∈ ℤ → (ran ℤ≥ ↾t 𝑍) ⊆ ran ℤ≥) |
8 | 7 | sseld 3920 | . . . 4 ⊢ (𝑀 ∈ ℤ → (∅ ∈ (ran ℤ≥ ↾t 𝑍) → ∅ ∈ ran ℤ≥)) |
9 | 5, 8 | mtoi 198 | . . 3 ⊢ (𝑀 ∈ ℤ → ¬ ∅ ∈ (ran ℤ≥ ↾t 𝑍)) |
10 | uzssz 12603 | . . . . 5 ⊢ (ℤ≥‘𝑀) ⊆ ℤ | |
11 | 1, 10 | eqsstri 3955 | . . . 4 ⊢ 𝑍 ⊆ ℤ |
12 | trfbas2 22994 | . . . 4 ⊢ ((ran ℤ≥ ∈ (fBas‘ℤ) ∧ 𝑍 ⊆ ℤ) → ((ran ℤ≥ ↾t 𝑍) ∈ (fBas‘𝑍) ↔ ¬ ∅ ∈ (ran ℤ≥ ↾t 𝑍))) | |
13 | 3, 11, 12 | mp2an 689 | . . 3 ⊢ ((ran ℤ≥ ↾t 𝑍) ∈ (fBas‘𝑍) ↔ ¬ ∅ ∈ (ran ℤ≥ ↾t 𝑍)) |
14 | 9, 13 | sylibr 233 | . 2 ⊢ (𝑀 ∈ ℤ → (ran ℤ≥ ↾t 𝑍) ∈ (fBas‘𝑍)) |
15 | 2, 14 | eqeltrrd 2840 | 1 ⊢ (𝑀 ∈ ℤ → (ℤ≥ “ 𝑍) ∈ (fBas‘𝑍)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 = wceq 1539 ∈ wcel 2106 ⊆ wss 3887 ∅c0 4256 ran crn 5590 “ cima 5592 ‘cfv 6433 (class class class)co 7275 ℤcz 12319 ℤ≥cuz 12582 ↾t crest 17131 fBascfbas 20585 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-i2m1 10939 ax-1ne0 10940 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-neg 11208 df-nn 11974 df-z 12320 df-uz 12583 df-rest 17133 df-fbas 20594 |
This theorem is referenced by: lmflf 23156 caucfil 24447 cmetcaulem 24452 |
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