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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 9137 | . 2 ⊢ 1 ∈ ℕ | |
| 2 | nn0nnaddcl 9416 | . 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 2200 (class class class)co 6010 1c1 8016 + caddc 8018 ℕcn 9126 ℕ0cn0 9385 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-sep 4202 ax-cnex 8106 ax-resscn 8107 ax-1cn 8108 ax-1re 8109 ax-icn 8110 ax-addcl 8111 ax-addrcl 8112 ax-mulcl 8113 ax-addcom 8115 ax-addass 8117 ax-i2m1 8120 ax-0id 8123 ax-rnegex 8124 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-br 4084 df-iota 5281 df-fv 5329 df-ov 6013 df-inn 9127 df-n0 9386 |
| This theorem is referenced by: elnn0nn 9427 elz2 9534 peano5uzti 9571 fseq1p1m1 10307 fzonn0p1 10434 nn0ennn 10672 faccl 10974 facdiv 10977 facwordi 10979 faclbnd 10980 facubnd 10984 bcm1k 10999 bcp1n 11000 bcp1nk 11001 bcpasc 11005 ccats1pfxeqrex 11268 wrdind 11275 wrd2ind 11276 ccats1pfxeqbi 11295 bcxmas 12021 efcllemp 12190 uzwodc 12579 prmfac1 12695 pcfac 12894 4sqlem12 12946 gsumfzconst 13899 plycolemc 15453 gausslemma2dlem3 15763 2lgslem1a 15788 |
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