| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > nn0lt10b | Structured version Visualization version GIF version | ||
| Description: A nonnegative integer less than 1 is 0. (Contributed by Paul Chapman, 22-Jun-2011.) (Proof shortened by OpenAI, 25-Mar-2020.) |
| Ref | Expression |
|---|---|
| nn0lt10b | ⊢ (𝑁 ∈ ℕ0 → (𝑁 < 1 ↔ 𝑁 = 0)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elnn0 12517 | . . 3 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℕ ∨ 𝑁 = 0)) | |
| 2 | nnnlt1 12279 | . . . . 5 ⊢ (𝑁 ∈ ℕ → ¬ 𝑁 < 1) | |
| 3 | 2 | pm2.21d 122 | . . . 4 ⊢ (𝑁 ∈ ℕ → (𝑁 < 1 → 𝑁 = 0)) |
| 4 | ax-1 6 | . . . 4 ⊢ (𝑁 = 0 → (𝑁 < 1 → 𝑁 = 0)) | |
| 5 | 3, 4 | jaoi 871 | . . 3 ⊢ ((𝑁 ∈ ℕ ∨ 𝑁 = 0) → (𝑁 < 1 → 𝑁 = 0)) |
| 6 | 1, 5 | sylbi 220 | . 2 ⊢ (𝑁 ∈ ℕ0 → (𝑁 < 1 → 𝑁 = 0)) |
| 7 | 0lt1 11747 | . . 3 ⊢ 0 < 1 | |
| 8 | breq1 5114 | . . 3 ⊢ (𝑁 = 0 → (𝑁 < 1 ↔ 0 < 1)) | |
| 9 | 7, 8 | mpbiri 261 | . 2 ⊢ (𝑁 = 0 → 𝑁 < 1) |
| 10 | 6, 9 | impbid1 228 | 1 ⊢ (𝑁 ∈ ℕ0 → (𝑁 < 1 ↔ 𝑁 = 0)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∨ wo 861 = wceq 1570 ∈ wcel 2146 class class class wbr 5111 0cc0 11111 1c1 11112 < clt 11254 ℕcn 12244 ℕ0cn0 12515 |
| 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 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 ax-resscn 11168 ax-1cn 11169 ax-icn 11170 ax-addcl 11171 ax-addrcl 11172 ax-mulcl 11173 ax-mulrcl 11174 ax-mulcom 11175 ax-addass 11176 ax-mulass 11177 ax-distr 11178 ax-i2m1 11179 ax-1ne0 11180 ax-1rid 11181 ax-rnegex 11182 ax-rrecex 11183 ax-cnre 11184 ax-pre-lttri 11185 ax-pre-lttrn 11186 ax-pre-ltadd 11187 ax-pre-mulgt0 11188 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 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-om 7865 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-pnf 11256 df-mnf 11257 df-xr 11258 df-ltxr 11259 df-le 11260 df-sub 11454 df-neg 11455 df-nn 12245 df-n0 12516 |
| This theorem is used by: nn0lt2 12671 nn0le2is012 12672 fz1n 13582 zabs0b 15385 zdis 25005 plyrem 26497 efif1olem4 26741 acycgr1v 35654 poimirlem28 38332 |
| Copyright terms: Public domain | W3C validator |