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Mirrors > Home > MPE Home > Th. List > ssfzunsn | Structured version Visualization version GIF version |
Description: A subset of a finite sequence of integers extended by an integer is a subset of a (possibly extended) finite sequence of integers. (Contributed by AV, 8-Jun-2021.) (Proof shortened by AV, 13-Nov-2021.) |
Ref | Expression |
---|---|
ssfzunsn | ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ (ℤ≥‘𝑀)) → (𝑆 ∪ {𝐼}) ⊆ (𝑀...if(𝐼 ≤ 𝑁, 𝑁, 𝐼))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 1138 | . . 3 ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ (ℤ≥‘𝑀)) → 𝑆 ⊆ (𝑀...𝑁)) | |
2 | eluzel2 12443 | . . . 4 ⊢ (𝐼 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ) | |
3 | 2 | 3ad2ant3 1137 | . . 3 ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ (ℤ≥‘𝑀)) → 𝑀 ∈ ℤ) |
4 | simp2 1139 | . . 3 ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ (ℤ≥‘𝑀)) → 𝑁 ∈ ℤ) | |
5 | eluzelz 12448 | . . . 4 ⊢ (𝐼 ∈ (ℤ≥‘𝑀) → 𝐼 ∈ ℤ) | |
6 | 5 | 3ad2ant3 1137 | . . 3 ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ (ℤ≥‘𝑀)) → 𝐼 ∈ ℤ) |
7 | ssfzunsnext 13157 | . . 3 ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ ℤ)) → (𝑆 ∪ {𝐼}) ⊆ (if(𝐼 ≤ 𝑀, 𝐼, 𝑀)...if(𝐼 ≤ 𝑁, 𝑁, 𝐼))) | |
8 | 1, 3, 4, 6, 7 | syl13anc 1374 | . 2 ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ (ℤ≥‘𝑀)) → (𝑆 ∪ {𝐼}) ⊆ (if(𝐼 ≤ 𝑀, 𝐼, 𝑀)...if(𝐼 ≤ 𝑁, 𝑁, 𝐼))) |
9 | eluz2 12444 | . . . . 5 ⊢ (𝐼 ∈ (ℤ≥‘𝑀) ↔ (𝑀 ∈ ℤ ∧ 𝐼 ∈ ℤ ∧ 𝑀 ≤ 𝐼)) | |
10 | zre 12180 | . . . . . . . . 9 ⊢ (𝐼 ∈ ℤ → 𝐼 ∈ ℝ) | |
11 | 10 | rexrd 10883 | . . . . . . . 8 ⊢ (𝐼 ∈ ℤ → 𝐼 ∈ ℝ*) |
12 | 11 | 3ad2ant2 1136 | . . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝐼 ∈ ℤ ∧ 𝑀 ≤ 𝐼) → 𝐼 ∈ ℝ*) |
13 | zre 12180 | . . . . . . . . 9 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℝ) | |
14 | 13 | rexrd 10883 | . . . . . . . 8 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℝ*) |
15 | 14 | 3ad2ant1 1135 | . . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝐼 ∈ ℤ ∧ 𝑀 ≤ 𝐼) → 𝑀 ∈ ℝ*) |
16 | simp3 1140 | . . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝐼 ∈ ℤ ∧ 𝑀 ≤ 𝐼) → 𝑀 ≤ 𝐼) | |
17 | xrmineq 12770 | . . . . . . 7 ⊢ ((𝐼 ∈ ℝ* ∧ 𝑀 ∈ ℝ* ∧ 𝑀 ≤ 𝐼) → if(𝐼 ≤ 𝑀, 𝐼, 𝑀) = 𝑀) | |
18 | 12, 15, 16, 17 | syl3anc 1373 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝐼 ∈ ℤ ∧ 𝑀 ≤ 𝐼) → if(𝐼 ≤ 𝑀, 𝐼, 𝑀) = 𝑀) |
19 | 18 | eqcomd 2743 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝐼 ∈ ℤ ∧ 𝑀 ≤ 𝐼) → 𝑀 = if(𝐼 ≤ 𝑀, 𝐼, 𝑀)) |
20 | 9, 19 | sylbi 220 | . . . 4 ⊢ (𝐼 ∈ (ℤ≥‘𝑀) → 𝑀 = if(𝐼 ≤ 𝑀, 𝐼, 𝑀)) |
21 | 20 | 3ad2ant3 1137 | . . 3 ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ (ℤ≥‘𝑀)) → 𝑀 = if(𝐼 ≤ 𝑀, 𝐼, 𝑀)) |
22 | 21 | oveq1d 7228 | . 2 ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ (ℤ≥‘𝑀)) → (𝑀...if(𝐼 ≤ 𝑁, 𝑁, 𝐼)) = (if(𝐼 ≤ 𝑀, 𝐼, 𝑀)...if(𝐼 ≤ 𝑁, 𝑁, 𝐼))) |
23 | 8, 22 | sseqtrrd 3942 | 1 ⊢ ((𝑆 ⊆ (𝑀...𝑁) ∧ 𝑁 ∈ ℤ ∧ 𝐼 ∈ (ℤ≥‘𝑀)) → (𝑆 ∪ {𝐼}) ⊆ (𝑀...if(𝐼 ≤ 𝑁, 𝑁, 𝐼))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1089 = wceq 1543 ∈ wcel 2110 ∪ cun 3864 ⊆ wss 3866 ifcif 4439 {csn 4541 class class class wbr 5053 ‘cfv 6380 (class class class)co 7213 ℝ*cxr 10866 ≤ cle 10868 ℤcz 12176 ℤ≥cuz 12438 ...cfz 13095 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-cnex 10785 ax-resscn 10786 ax-pre-lttri 10803 ax-pre-lttrn 10804 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-op 4548 df-uni 4820 df-iun 4906 df-br 5054 df-opab 5116 df-mpt 5136 df-id 5455 df-po 5468 df-so 5469 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-ov 7216 df-oprab 7217 df-mpo 7218 df-1st 7761 df-2nd 7762 df-er 8391 df-en 8627 df-dom 8628 df-sdom 8629 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-neg 11065 df-z 12177 df-uz 12439 df-fz 13096 |
This theorem is referenced by: (None) |
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