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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 12605 | . . . . 5 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ) | |
| 2 | ltp1 12065 | . . . . . 6 ⊢ (𝑁 ∈ ℝ → 𝑁 < (𝑁 + 1)) | |
| 3 | id 23 | . . . . . . 7 ⊢ (𝑁 ∈ ℝ → 𝑁 ∈ ℝ) | |
| 4 | peano2re 11393 | . . . . . . 7 ⊢ (𝑁 ∈ ℝ → (𝑁 + 1) ∈ ℝ) | |
| 5 | 3, 4 | ltnled 11367 | . . . . . 6 ⊢ (𝑁 ∈ ℝ → (𝑁 < (𝑁 + 1) ↔ ¬ (𝑁 + 1) ≤ 𝑁)) |
| 6 | 2, 5 | mpbid 235 | . . . . 5 ⊢ (𝑁 ∈ ℝ → ¬ (𝑁 + 1) ≤ 𝑁) |
| 7 | 1, 6 | syl 18 | . . . 4 ⊢ (𝑁 ∈ ℤ → ¬ (𝑁 + 1) ≤ 𝑁) |
| 8 | 7 | intnand 494 | . . 3 ⊢ (𝑁 ∈ ℤ → ¬ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁)) |
| 9 | 8 | 3ad2ant2 1152 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) → ¬ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁)) |
| 10 | elfz2 13552 | . . . 4 ⊢ ((𝑁 + 1) ∈ (𝑀...𝑁) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) ∧ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁))) | |
| 11 | 10 | notbii 323 | . . 3 ⊢ (¬ (𝑁 + 1) ∈ (𝑀...𝑁) ↔ ¬ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) ∧ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁))) |
| 12 | imnan 405 | . . 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 281 | . 2 ⊢ (¬ (𝑁 + 1) ∈ (𝑀...𝑁) ↔ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ (𝑁 + 1) ∈ ℤ) → ¬ (𝑀 ≤ (𝑁 + 1) ∧ (𝑁 + 1) ≤ 𝑁))) |
| 14 | 9, 13 | mpbir 234 | 1 ⊢ ¬ (𝑁 + 1) ∈ (𝑀...𝑁) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∧ w3a 1103 ∈ wcel 2146 class class class wbr 5112 (class class class)co 7416 ℝcr 11109 1c1 11111 + caddc 11113 < clt 11253 ≤ cle 11254 ℤcz 12601 ...cfz 13545 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5260 ax-nul 5272 ax-pow 5339 ax-pr 5407 ax-un 7738 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4491 df-pw 4567 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4876 df-iun 4961 df-br 5113 df-opab 5177 df-mpt 5196 df-id 5559 df-po 5572 df-so 5573 df-xp 5670 df-rel 5671 df-cnv 5672 df-co 5673 df-dm 5674 df-rn 5675 df-res 5676 df-ima 5677 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-1st 7988 df-2nd 7989 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-pnf 11255 df-mnf 11256 df-xr 11257 df-ltxr 11258 df-le 11259 df-sub 11453 df-neg 11454 df-z 12602 df-fz 13546 |
| This theorem is used by: fprodm1 16032 gsumzaddlem 20001 wlkp1lem1 30036 wlkp1lem5 30040 esplyfvn 33980 fwddifnp1 36669 caratheodorylem1 47272 |
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