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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 9268 | . 2 ⊢ 1 ∈ ℕ | |
| 2 | nn0nnaddcl 9547 | . 2 ⊢ ((𝑁 ∈ ℕ0 ∧ 1 ∈ ℕ) → (𝑁 + 1) ∈ ℕ) | |
| 3 | 1, 2 | mpan2 425 | 1 ⊢ (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2205 (class class class)co 6058 1c1 8144 + caddc 8146 ℕcn 9257 ℕ0cn0 9516 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2216 ax-sep 4233 ax-cnex 8234 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-addcom 8243 ax-addass 8245 ax-i2m1 8248 ax-0id 8251 ax-rnegex 8252 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-rab 2531 df-v 2817 df-un 3218 df-in 3220 df-ss 3227 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-int 3955 df-br 4115 df-iota 5317 df-fv 5365 df-ov 6061 df-inn 9258 df-n0 9517 |
| This theorem is referenced by: elnn0nn 9558 elz2 9669 peano5uzti 9707 fseq1p1m1 10453 fzonn0p1 10581 nn0ennn 10822 faccl 11125 facdiv 11128 facwordi 11130 faclbnd 11131 facubnd 11135 bcm1k 11150 bcp1n 11151 bcp1nk 11152 bcpasc 11156 ccats1pfxeqrex 11435 wrdind 11442 wrd2ind 11443 ccats1pfxeqbi 11462 bcxmas 12203 efcllemp 12372 uzwodc 12761 prmfac1 12877 pcfac 13076 4sqlem12 13128 gsumfzconst 14097 gfsump1 14111 plycolemc 15752 gausslemma2dlem3 16065 2lgslem1a 16090 depindlem1 16630 |
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