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| Mirrors > Home > ILE Home > Th. List > nn0p1nn | GIF version | ||
| Description: A nonnegative integer plus 1 is a positive integer. (Contributed by Raph Levien, 30-Jun-2006.) (Revised by Mario Carneiro, 16-May-2014.) |
| Ref | Expression |
|---|---|
| nn0p1nn | ⊢ (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1nn 9324 | . 2 ⊢ 1 ∈ ℕ | |
| 2 | nn0nnaddcl 9605 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 1 ∈ ℕ) → (𝑁 + 1) ∈ ℕ) | |
| 3 | 1, 2 | mpan2 429 | 1 ⊢ (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 (class class class)co 6088 1c1 8186 + caddc 8188 ℕcn 9313 ℕ0cn0 9574 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-sep 4251 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-addcom 8285 ax-addass 8287 ax-i2m1 8290 ax-0id 8293 ax-rnegex 8294 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4132 df-iota 5340 df-fv 5388 df-ov 6091 df-inn 9314 df-n0 9575 |
| This theorem is used by: elnn0nn 9616 elz2 9725 peano5uzti 9764 fseq1p1m1 10517 fzonn0p1 10645 nn0ennn 10890 faccl 11194 facdiv 11197 facwordi 11199 faclbnd 11200 facubnd 11204 bcm1k 11219 bcp1n 11220 bcp1nk 11221 bcpasc 11225 hashf1 11308 ccats1pfxeqrex 11508 wrdind 11515 wrd2ind 11516 ccats1pfxeqbi 11535 bcxmas 12280 efcllemp 12449 uzwodc 12838 prmfac1 12955 pcfac 13157 4sqlem12 13209 gzsumconst 14232 gsump1 14246 plycolemc 16001 log2tlbndlog2 16237 log2ublem2 16239 log2ublog2 16241 birthdaylem2 16243 chtublem 16312 bcmono 16321 bcp1ctr 16323 gausslemma2dlem3 16404 2lgslem1a 16429 depindlem1 16969 |
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