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| Mirrors > Home > MPE Home > Th. List > fzp1nel | Structured version Visualization version GIF version | ||
| Description: One plus the upper bound of a finite set of integers is not a member of that set. (Contributed by Scott Fenton, 16-Dec-2017.) |
| Ref | Expression |
|---|---|
| fzp1nel | ⊢ ¬ (𝑁 + 1) ∈ (𝑀...𝑁) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zre 12517 | . . . . 5 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ) | |
| 2 | ltp1 11984 | . . . . . 6 ⊢ (𝑁 ∈ ℝ → 𝑁 < (𝑁 + 1)) | |
| 3 | id 22 | . . . . . . 7 ⊢ (𝑁 ∈ ℝ → 𝑁 ∈ ℝ) | |
| 4 | peano2re 11308 | . . . . . . 7 ⊢ (𝑁 ∈ ℝ → (𝑁 + 1) ∈ ℝ) | |
| 5 | 3, 4 | ltnled 11282 | . . . . . 6 ⊢ (𝑁 ∈ ℝ → (𝑁 < (𝑁 + 1) ↔ ¬ (𝑁 + 1) ≤ 𝑁)) |
| 6 | 2, 5 | mpbid 232 | . . . . 5 ⊢ (𝑁 ∈ ℝ → ¬ (𝑁 + 1) ≤ 𝑁) |
| 7 | 1, 6 | syl 17 | . . . 4 ⊢ (𝑁 ∈ ℤ → ¬ (𝑁 + 1) ≤ 𝑁) |
| 8 | 7 | intnand 488 | . . 3 ⊢ (𝑁 ∈ ℤ → ¬ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁)) |
| 9 | 8 | 3ad2ant2 1135 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) → ¬ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁)) |
| 10 | elfz2 13457 | . . . 4 ⊢ ((𝑁 + 1) ∈ (𝑀...𝑁) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) ∧ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁))) | |
| 11 | 10 | notbii 320 | . . 3 ⊢ (¬ (𝑁 + 1) ∈ (𝑀...𝑁) ↔ ¬ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) ∧ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁))) |
| 12 | imnan 399 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) → ¬ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁)) ↔ ¬ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) ∧ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁))) | |
| 13 | 11, 12 | bitr4i 278 | . 2 ⊢ (¬ (𝑁 + 1) ∈ (𝑀...𝑁) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) → ¬ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁))) |
| 14 | 9, 13 | mpbir 231 | 1 ⊢ ¬ (𝑁 + 1) ∈ (𝑀...𝑁) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 ∧ w3a 1087 ∈ wcel 2114 class class class wbr 5074 (class class class)co 7356 ℝcr 11026 1c1 11028 + caddc 11030 < clt 11168 ≤ cle 11169 ℤcz 12513 ...cfz 13450 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2184 ax-ext 2707 ax-sep 5220 ax-nul 5230 ax-pow 5296 ax-pr 5364 ax-un 7678 ax-cnex 11083 ax-resscn 11084 ax-1cn 11085 ax-icn 11086 ax-addcl 11087 ax-addrcl 11088 ax-mulcl 11089 ax-mulrcl 11090 ax-mulcom 11091 ax-addass 11092 ax-mulass 11093 ax-distr 11094 ax-i2m1 11095 ax-1ne0 11096 ax-1rid 11097 ax-rnegex 11098 ax-rrecex 11099 ax-cnre 11100 ax-pre-lttri 11101 ax-pre-lttrn 11102 ax-pre-ltadd 11103 ax-pre-mulgt0 11104 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3060 df-reu 3341 df-rab 3388 df-v 3429 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-iun 4925 df-br 5075 df-opab 5137 df-mpt 5156 df-id 5515 df-po 5528 df-so 5529 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-iota 6443 df-fun 6489 df-fn 6490 df-f 6491 df-f1 6492 df-fo 6493 df-f1o 6494 df-fv 6495 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-1st 7931 df-2nd 7932 df-er 8632 df-en 8883 df-dom 8884 df-sdom 8885 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11368 df-neg 11369 df-z 12514 df-fz 13451 |
| This theorem is referenced by: fprodm1 15921 gsumzaddlem 19885 wlkp1lem1 29728 wlkp1lem5 29732 esplyfvn 33709 fwddifnp1 36335 caratheodorylem1 46942 |
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