| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > dfn2 | Structured version Visualization version GIF version | ||
| Description: The set of positive integers defined in terms of nonnegative integers. (Contributed by NM, 23-Sep-2007.) (Proof shortened by Mario Carneiro, 13-Feb-2013.) |
| Ref | Expression |
|---|---|
| dfn2 | ⊢ ℕ = (ℕ0 ∖ {0}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-n0 12529 | . . 3 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | 1 | difeq1i 4070 | . 2 ⊢ (ℕ0 ∖ {0}) = ((ℕ ∪ {0}) ∖ {0}) |
| 3 | difun2 4437 | . 2 ⊢ ((ℕ ∪ {0}) ∖ {0}) = (ℕ ∖ {0}) | |
| 4 | 0nnn 12296 | . . 3 ⊢ ¬ 0 ∈ ℕ | |
| 5 | difsn 4761 | . . 3 ⊢ (¬ 0 ∈ ℕ → (ℕ ∖ {0}) = ℕ) | |
| 6 | 4, 5 | ax-mp 5 | . 2 ⊢ (ℕ ∖ {0}) = ℕ |
| 7 | 2, 3, 6 | 3eqtrri 2788 | 1 ⊢ ℕ = (ℕ0 ∖ {0}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 = wceq 1570 ∈ wcel 2145 ∖ cdif 3896 ∪ cun 3897 {csn 4584 0cc0 11124 ℕcn 12257 ℕ0cn0 12528 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-ov 7416 df-om 7863 df-2nd 7987 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-er 8696 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-nn 12258 df-n0 12529 |
| This theorem is used by: elnnne0 12542 fcdmnn0supp 12585 fcdmnn0fsupp 12586 fcdmnn0suppg 12587 facnn 14339 fac0 14340 ruclem4 16322 fzo0dvdseq 16413 chnccats1 18713 chnccat 18714 domnchr 21745 mhpmulcl 22377 logexprlim 27461 psrbasfsupp 34021 eulerpartgbij 34883 eulerpartlemmf 34886 eulerpartlemgf 34890 dffltz 43480 |
| Copyright terms: Public domain | W3C validator |