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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 9253 | . 2 ⊢ 1 ∈ ℕ | |
| 2 | nn0nnaddcl 9532 | . 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 6052 1c1 8133 + caddc 8135 ℕcn 9242 ℕ0cn0 9501 |
| 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 4230 ax-cnex 8223 ax-resscn 8224 ax-1cn 8225 ax-1re 8226 ax-icn 8227 ax-addcl 8228 ax-addrcl 8229 ax-mulcl 8230 ax-addcom 8232 ax-addass 8234 ax-i2m1 8237 ax-0id 8240 ax-rnegex 8241 |
| 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 3217 df-in 3219 df-ss 3226 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-int 3952 df-br 4112 df-iota 5314 df-fv 5362 df-ov 6055 df-inn 9243 df-n0 9502 |
| This theorem is referenced by: elnn0nn 9543 elz2 9654 peano5uzti 9692 fseq1p1m1 10435 fzonn0p1 10563 nn0ennn 10802 faccl 11105 facdiv 11108 facwordi 11110 faclbnd 11111 facubnd 11115 bcm1k 11130 bcp1n 11131 bcp1nk 11132 bcpasc 11136 ccats1pfxeqrex 11415 wrdind 11422 wrd2ind 11423 ccats1pfxeqbi 11442 bcxmas 12183 efcllemp 12352 uzwodc 12741 prmfac1 12857 pcfac 13056 4sqlem12 13108 gsumfzconst 14079 plycolemc 15672 gausslemma2dlem3 15985 2lgslem1a 16010 depindlem1 16550 gfsump1 16917 |
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