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Mirrors > Home > MPE Home > Th. List > fzpreddisj | Structured version Visualization version GIF version |
Description: A finite set of sequential integers is disjoint with its predecessor. (Contributed by AV, 24-Aug-2019.) |
Ref | Expression |
---|---|
fzpreddisj | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ({𝑀} ∩ ((𝑀 + 1)...𝑁)) = ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | incom 3838 | . 2 ⊢ ({𝑀} ∩ ((𝑀 + 1)...𝑁)) = (((𝑀 + 1)...𝑁) ∩ {𝑀}) | |
2 | 0lt1 10588 | . . . . . . . 8 ⊢ 0 < 1 | |
3 | 0re 10078 | . . . . . . . . 9 ⊢ 0 ∈ ℝ | |
4 | 1re 10077 | . . . . . . . . 9 ⊢ 1 ∈ ℝ | |
5 | 3, 4 | ltnlei 10196 | . . . . . . . 8 ⊢ (0 < 1 ↔ ¬ 1 ≤ 0) |
6 | 2, 5 | mpbi 220 | . . . . . . 7 ⊢ ¬ 1 ≤ 0 |
7 | eluzel2 11730 | . . . . . . . . 9 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ) | |
8 | 7 | zred 11520 | . . . . . . . 8 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℝ) |
9 | leaddle0 10581 | . . . . . . . 8 ⊢ ((𝑀 ∈ ℝ ∧ 1 ∈ ℝ) → ((𝑀 + 1) ≤ 𝑀 ↔ 1 ≤ 0)) | |
10 | 8, 4, 9 | sylancl 695 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀 + 1) ≤ 𝑀 ↔ 1 ≤ 0)) |
11 | 6, 10 | mtbiri 316 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ¬ (𝑀 + 1) ≤ 𝑀) |
12 | 11 | intnanrd 983 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ¬ ((𝑀 + 1) ≤ 𝑀 ∧ 𝑀 ≤ 𝑁)) |
13 | 12 | intnand 982 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ¬ (((𝑀 + 1) ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ) ∧ ((𝑀 + 1) ≤ 𝑀 ∧ 𝑀 ≤ 𝑁))) |
14 | elfz2 12371 | . . . 4 ⊢ (𝑀 ∈ ((𝑀 + 1)...𝑁) ↔ (((𝑀 + 1) ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ) ∧ ((𝑀 + 1) ≤ 𝑀 ∧ 𝑀 ≤ 𝑁))) | |
15 | 13, 14 | sylnibr 318 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ¬ 𝑀 ∈ ((𝑀 + 1)...𝑁)) |
16 | disjsn 4278 | . . 3 ⊢ ((((𝑀 + 1)...𝑁) ∩ {𝑀}) = ∅ ↔ ¬ 𝑀 ∈ ((𝑀 + 1)...𝑁)) | |
17 | 15, 16 | sylibr 224 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (((𝑀 + 1)...𝑁) ∩ {𝑀}) = ∅) |
18 | 1, 17 | syl5eq 2697 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ({𝑀} ∩ ((𝑀 + 1)...𝑁)) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 196 ∧ wa 383 ∧ w3a 1054 = wceq 1523 ∈ wcel 2030 ∩ cin 3606 ∅c0 3948 {csn 4210 class class class wbr 4685 ‘cfv 5926 (class class class)co 6690 ℝcr 9973 0cc0 9974 1c1 9975 + caddc 9977 < clt 10112 ≤ cle 10113 ℤcz 11415 ℤ≥cuz 11725 ...cfz 12364 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 ax-cnex 10030 ax-resscn 10031 ax-1cn 10032 ax-icn 10033 ax-addcl 10034 ax-addrcl 10035 ax-mulcl 10036 ax-mulrcl 10037 ax-mulcom 10038 ax-addass 10039 ax-mulass 10040 ax-distr 10041 ax-i2m1 10042 ax-1ne0 10043 ax-1rid 10044 ax-rnegex 10045 ax-rrecex 10046 ax-cnre 10047 ax-pre-lttri 10048 ax-pre-lttrn 10049 ax-pre-ltadd 10050 ax-pre-mulgt0 10051 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1055 df-3an 1056 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-nel 2927 df-ral 2946 df-rex 2947 df-reu 2948 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-op 4217 df-uni 4469 df-iun 4554 df-br 4686 df-opab 4746 df-mpt 4763 df-id 5053 df-po 5064 df-so 5065 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-riota 6651 df-ov 6693 df-oprab 6694 df-mpt2 6695 df-1st 7210 df-2nd 7211 df-er 7787 df-en 7998 df-dom 7999 df-sdom 8000 df-pnf 10114 df-mnf 10115 df-xr 10116 df-ltxr 10117 df-le 10118 df-sub 10306 df-neg 10307 df-z 11416 df-uz 11726 df-fz 12365 |
This theorem is referenced by: gsummptfzsplitl 18379 chtvalz 30835 |
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