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Mirrors > Home > MPE Home > Th. List > prinfzo0 | Structured version Visualization version GIF version |
Description: The intersection of a half-open integer range and the pair of its outer left borders is empty. (Contributed by AV, 9-Jan-2021.) |
Ref | Expression |
---|---|
prinfzo0 | ⊢ (𝑀 ∈ ℤ → ({𝑀, 𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elfz3 13266 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ (𝑀...𝑀)) | |
2 | fznuz 13338 | . . . . . 6 ⊢ (𝑀 ∈ (𝑀...𝑀) → ¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1))) | |
3 | 1, 2 | syl 17 | . . . . 5 ⊢ (𝑀 ∈ ℤ → ¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1))) |
4 | 3 | 3mix1d 1335 | . . . 4 ⊢ (𝑀 ∈ ℤ → (¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∨ ¬ 𝑁 ∈ ℤ ∨ ¬ 𝑀 < 𝑁)) |
5 | 3ianor 1106 | . . . . 5 ⊢ (¬ (𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∧ 𝑁 ∈ ℤ ∧ 𝑀 < 𝑁) ↔ (¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∨ ¬ 𝑁 ∈ ℤ ∨ ¬ 𝑀 < 𝑁)) | |
6 | elfzo2 13390 | . . . . 5 ⊢ (𝑀 ∈ ((𝑀 + 1)..^𝑁) ↔ (𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∧ 𝑁 ∈ ℤ ∧ 𝑀 < 𝑁)) | |
7 | 5, 6 | xchnxbir 333 | . . . 4 ⊢ (¬ 𝑀 ∈ ((𝑀 + 1)..^𝑁) ↔ (¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∨ ¬ 𝑁 ∈ ℤ ∨ ¬ 𝑀 < 𝑁)) |
8 | 4, 7 | sylibr 233 | . . 3 ⊢ (𝑀 ∈ ℤ → ¬ 𝑀 ∈ ((𝑀 + 1)..^𝑁)) |
9 | incom 4135 | . . . . 5 ⊢ ({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = (((𝑀 + 1)..^𝑁) ∩ {𝑀}) | |
10 | 9 | eqeq1i 2743 | . . . 4 ⊢ (({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ (((𝑀 + 1)..^𝑁) ∩ {𝑀}) = ∅) |
11 | disjsn 4647 | . . . 4 ⊢ ((((𝑀 + 1)..^𝑁) ∩ {𝑀}) = ∅ ↔ ¬ 𝑀 ∈ ((𝑀 + 1)..^𝑁)) | |
12 | 10, 11 | bitri 274 | . . 3 ⊢ (({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ ¬ 𝑀 ∈ ((𝑀 + 1)..^𝑁)) |
13 | 8, 12 | sylibr 233 | . 2 ⊢ (𝑀 ∈ ℤ → ({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅) |
14 | fzonel 13401 | . . . 4 ⊢ ¬ 𝑁 ∈ ((𝑀 + 1)..^𝑁) | |
15 | 14 | a1i 11 | . . 3 ⊢ (𝑀 ∈ ℤ → ¬ 𝑁 ∈ ((𝑀 + 1)..^𝑁)) |
16 | incom 4135 | . . . . 5 ⊢ ({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = (((𝑀 + 1)..^𝑁) ∩ {𝑁}) | |
17 | 16 | eqeq1i 2743 | . . . 4 ⊢ (({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ (((𝑀 + 1)..^𝑁) ∩ {𝑁}) = ∅) |
18 | disjsn 4647 | . . . 4 ⊢ ((((𝑀 + 1)..^𝑁) ∩ {𝑁}) = ∅ ↔ ¬ 𝑁 ∈ ((𝑀 + 1)..^𝑁)) | |
19 | 17, 18 | bitri 274 | . . 3 ⊢ (({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ ¬ 𝑁 ∈ ((𝑀 + 1)..^𝑁)) |
20 | 15, 19 | sylibr 233 | . 2 ⊢ (𝑀 ∈ ℤ → ({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅) |
21 | df-pr 4564 | . . . . 5 ⊢ {𝑀, 𝑁} = ({𝑀} ∪ {𝑁}) | |
22 | 21 | ineq1i 4142 | . . . 4 ⊢ ({𝑀, 𝑁} ∩ ((𝑀 + 1)..^𝑁)) = (({𝑀} ∪ {𝑁}) ∩ ((𝑀 + 1)..^𝑁)) |
23 | 22 | eqeq1i 2743 | . . 3 ⊢ (({𝑀, 𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ (({𝑀} ∪ {𝑁}) ∩ ((𝑀 + 1)..^𝑁)) = ∅) |
24 | undisj1 4395 | . . 3 ⊢ ((({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ∧ ({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅) ↔ (({𝑀} ∪ {𝑁}) ∩ ((𝑀 + 1)..^𝑁)) = ∅) | |
25 | 23, 24 | bitr4i 277 | . 2 ⊢ (({𝑀, 𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ (({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ∧ ({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅)) |
26 | 13, 20, 25 | sylanbrc 583 | 1 ⊢ (𝑀 ∈ ℤ → ({𝑀, 𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 ∨ w3o 1085 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ∪ cun 3885 ∩ cin 3886 ∅c0 4256 {csn 4561 {cpr 4563 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 1c1 10872 + caddc 10874 < clt 11009 ℤcz 12319 ℤ≥cuz 12582 ...cfz 13239 ..^cfzo 13382 |
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-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-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
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-riota 7232 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-sub 11207 df-neg 11208 df-nn 11974 df-n0 12234 df-z 12320 df-uz 12583 df-fz 13240 df-fzo 13383 |
This theorem is referenced by: spthispth 28094 |
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