Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > prinfzo0 | Structured version Visualization version GIF version |
Description: The intersection of a half-open integer range and the pair of its outer 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 12222 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ (𝑀...𝑀)) | |
2 | fznuz 12291 | . . . . . 6 ⊢ (𝑀 ∈ (𝑀...𝑀) → ¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1))) | |
3 | 1, 2 | syl 17 | . . . . 5 ⊢ (𝑀 ∈ ℤ → ¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1))) |
4 | 3 | 3mix1d 1229 | . . . 4 ⊢ (𝑀 ∈ ℤ → (¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∨ ¬ 𝑁 ∈ ℤ ∨ ¬ 𝑀 < 𝑁)) |
5 | 3ianor 1048 | . . . . 5 ⊢ (¬ (𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∧ 𝑁 ∈ ℤ ∧ 𝑀 < 𝑁) ↔ (¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∨ ¬ 𝑁 ∈ ℤ ∨ ¬ 𝑀 < 𝑁)) | |
6 | elfzo2 12342 | . . . . 5 ⊢ (𝑀 ∈ ((𝑀 + 1)..^𝑁) ↔ (𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∧ 𝑁 ∈ ℤ ∧ 𝑀 < 𝑁)) | |
7 | 5, 6 | xchnxbir 322 | . . . 4 ⊢ (¬ 𝑀 ∈ ((𝑀 + 1)..^𝑁) ↔ (¬ 𝑀 ∈ (ℤ≥‘(𝑀 + 1)) ∨ ¬ 𝑁 ∈ ℤ ∨ ¬ 𝑀 < 𝑁)) |
8 | 4, 7 | sylibr 223 | . . 3 ⊢ (𝑀 ∈ ℤ → ¬ 𝑀 ∈ ((𝑀 + 1)..^𝑁)) |
9 | incom 3767 | . . . . 5 ⊢ ({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = (((𝑀 + 1)..^𝑁) ∩ {𝑀}) | |
10 | 9 | eqeq1i 2615 | . . . 4 ⊢ (({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ (((𝑀 + 1)..^𝑁) ∩ {𝑀}) = ∅) |
11 | disjsn 4192 | . . . 4 ⊢ ((((𝑀 + 1)..^𝑁) ∩ {𝑀}) = ∅ ↔ ¬ 𝑀 ∈ ((𝑀 + 1)..^𝑁)) | |
12 | 10, 11 | bitri 263 | . . 3 ⊢ (({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ ¬ 𝑀 ∈ ((𝑀 + 1)..^𝑁)) |
13 | 8, 12 | sylibr 223 | . 2 ⊢ (𝑀 ∈ ℤ → ({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅) |
14 | fzonel 12352 | . . . 4 ⊢ ¬ 𝑁 ∈ ((𝑀 + 1)..^𝑁) | |
15 | 14 | a1i 11 | . . 3 ⊢ (𝑀 ∈ ℤ → ¬ 𝑁 ∈ ((𝑀 + 1)..^𝑁)) |
16 | incom 3767 | . . . . 5 ⊢ ({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = (((𝑀 + 1)..^𝑁) ∩ {𝑁}) | |
17 | 16 | eqeq1i 2615 | . . . 4 ⊢ (({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ (((𝑀 + 1)..^𝑁) ∩ {𝑁}) = ∅) |
18 | disjsn 4192 | . . . 4 ⊢ ((((𝑀 + 1)..^𝑁) ∩ {𝑁}) = ∅ ↔ ¬ 𝑁 ∈ ((𝑀 + 1)..^𝑁)) | |
19 | 17, 18 | bitri 263 | . . 3 ⊢ (({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ ¬ 𝑁 ∈ ((𝑀 + 1)..^𝑁)) |
20 | 15, 19 | sylibr 223 | . 2 ⊢ (𝑀 ∈ ℤ → ({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅) |
21 | df-pr 4128 | . . . . 5 ⊢ {𝑀, 𝑁} = ({𝑀} ∪ {𝑁}) | |
22 | 21 | ineq1i 3772 | . . . 4 ⊢ ({𝑀, 𝑁} ∩ ((𝑀 + 1)..^𝑁)) = (({𝑀} ∪ {𝑁}) ∩ ((𝑀 + 1)..^𝑁)) |
23 | 22 | eqeq1i 2615 | . . 3 ⊢ (({𝑀, 𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ (({𝑀} ∪ {𝑁}) ∩ ((𝑀 + 1)..^𝑁)) = ∅) |
24 | undisj1 3981 | . . 3 ⊢ ((({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ∧ ({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅) ↔ (({𝑀} ∪ {𝑁}) ∩ ((𝑀 + 1)..^𝑁)) = ∅) | |
25 | 23, 24 | bitr4i 266 | . 2 ⊢ (({𝑀, 𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ↔ (({𝑀} ∩ ((𝑀 + 1)..^𝑁)) = ∅ ∧ ({𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅)) |
26 | 13, 20, 25 | sylanbrc 695 | 1 ⊢ (𝑀 ∈ ℤ → ({𝑀, 𝑁} ∩ ((𝑀 + 1)..^𝑁)) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 383 ∨ w3o 1030 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ∪ cun 3538 ∩ cin 3539 ∅c0 3874 {csn 4125 {cpr 4127 class class class wbr 4583 ‘cfv 5804 (class class class)co 6549 1c1 9816 + caddc 9818 < clt 9953 ℤcz 11254 ℤ≥cuz 11563 ...cfz 12197 ..^cfzo 12334 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-nn 10898 df-n0 11170 df-z 11255 df-uz 11564 df-fz 12198 df-fzo 12335 |
This theorem is referenced by: sPthisPth 40932 |
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