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| Mirrors > Home > MPE Home > Th. List > 0mnnnnn0 | Structured version Visualization version GIF version | ||
| Description: The result of subtracting a positive integer from 0 is not a nonnegative integer. (Contributed by Alexander van der Vekens, 19-Mar-2018.) |
| Ref | Expression |
|---|---|
| 0mnnnnn0 | ⊢ (𝑁 ∈ ℕ → (0 − 𝑁) ∉ ℕ0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0re 11349 | . 2 ⊢ 0 ∈ ℝ | |
| 2 | nnel 3075 | . . 3 ⊢ (¬ (0 − 𝑁) ∉ ℕ0 ↔ (0 − 𝑁) ∈ ℕ0) | |
| 3 | df-neg 11583 | . . . . . 6 ⊢ -𝑁 = (0 − 𝑁) | |
| 4 | 3 | eqcomi 2772 | . . . . 5 ⊢ (0 − 𝑁) = -𝑁 |
| 5 | 4 | eleq1i 2855 | . . . 4 ⊢ ((0 − 𝑁) ∈ ℕ0 ↔ -𝑁 ∈ ℕ0) |
| 6 | nn0ge0 12671 | . . . . 5 ⊢ ( -𝑁 ∈ ℕ0 → 0 ≤ -𝑁) | |
| 7 | nnre 12382 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℝ) | |
| 8 | 7 | le0neg1d 11927 | . . . . . 6 ⊢ (𝑁 ∈ ℕ → (𝑁 ≤ 0 ↔ 0 ≤ -𝑁)) |
| 9 | nngt0 12409 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ → 0 < 𝑁) | |
| 10 | 0red 11350 | . . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → 0 ∈ ℝ) | |
| 11 | 10, 7 | ltnled 11496 | . . . . . . . 8 ⊢ (𝑁 ∈ ℕ → (0 < 𝑁 ↔ ¬ 𝑁 ≤ 0)) |
| 12 | pm2.21 124 | . . . . . . . 8 ⊢ (¬ 𝑁 ≤ 0 → (𝑁 ≤ 0 → ¬ 0 ∈ ℝ)) | |
| 13 | 11, 12 | biimtrdi 256 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ → (0 < 𝑁 → (𝑁 ≤ 0 → ¬ 0 ∈ ℝ))) |
| 14 | 9, 13 | mpd 16 | . . . . . 6 ⊢ (𝑁 ∈ ℕ → (𝑁 ≤ 0 → ¬ 0 ∈ ℝ)) |
| 15 | 8, 14 | sylbird 263 | . . . . 5 ⊢ (𝑁 ∈ ℕ → (0 ≤ -𝑁 → ¬ 0 ∈ ℝ)) |
| 16 | 6, 15 | syl5 35 | . . . 4 ⊢ (𝑁 ∈ ℕ → ( -𝑁 ∈ ℕ0 → ¬ 0 ∈ ℝ)) |
| 17 | 5, 16 | biimtrid 245 | . . 3 ⊢ (𝑁 ∈ ℕ → ((0 − 𝑁) ∈ ℕ0 → ¬ 0 ∈ ℝ)) |
| 18 | 2, 17 | biimtrid 245 | . 2 ⊢ (𝑁 ∈ ℕ → (¬ (0 − 𝑁) ∉ ℕ0 → ¬ 0 ∈ ℝ)) |
| 19 | 1, 18 | mt4i 119 | 1 ⊢ (𝑁 ∈ ℕ → (0 − 𝑁) ∉ ℕ0) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∈ wcel 2147 ∉ wnel 3065 class class class wbr 5108 (class class class)co 7451 ℝcr 11238 0cc0 11239 < clt 11382 ≤ cle 11383 − cmin 11580 -cneg 11581 ℕcn 12375 ℕ0cn0 12646 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 ax-pre-mulgt0 11316 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7408 df-ov 7454 df-oprab 7455 df-mpo 7456 df-om 7912 df-2nd 8036 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-er 8755 df-en 9012 df-dom 9013 df-sdom 9014 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 df-sub 11582 df-neg 11583 df-nn 12376 df-n0 12647 |
| This theorem is used by: 0nn0m1nnn0 12793 |
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