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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 9316 | . 2 ⊢ 1 ∈ ℕ | |
| 2 | nn0nnaddcl 9596 | . 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 6085 1c1 8180 + caddc 8182 ℕcn 9305 ℕ0cn0 9565 |
| 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 4249 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-addcom 8279 ax-addass 8281 ax-i2m1 8284 ax-0id 8287 ax-rnegex 8288 |
| 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 4131 df-iota 5337 df-fv 5385 df-ov 6088 df-inn 9306 df-n0 9566 |
| This theorem is used by: elnn0nn 9607 elz2 9718 peano5uzti 9756 fseq1p1m1 10503 fzonn0p1 10631 nn0ennn 10872 faccl 11175 facdiv 11178 facwordi 11180 faclbnd 11181 facubnd 11185 bcm1k 11200 bcp1n 11201 bcp1nk 11202 bcpasc 11206 hashf1 11289 ccats1pfxeqrex 11489 wrdind 11496 wrd2ind 11497 ccats1pfxeqbi 11516 bcxmas 12258 efcllemp 12427 uzwodc 12816 prmfac1 12932 pcfac 13131 4sqlem12 13183 gzsumconst 14145 gsump1 14159 plycolemc 15861 log2tlbndlog2 16088 log2ublem2 16090 log2ublog2 16092 birthdaylem2 16094 bcmono 16124 bcp1ctr 16126 gausslemma2dlem3 16194 2lgslem1a 16219 depindlem1 16759 |
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