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| Mirrors > Home > ILE Home > Th. List > nnmulcld | GIF version | ||
| Description: Closure of multiplication of positive integers. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| nnge1d.1 | ⊢ (𝜑 → 𝐴 ∈ ℕ) |
| nnmulcld.2 | ⊢ (𝜑 → 𝐵 ∈ ℕ) |
| Ref | Expression |
|---|---|
| nnmulcld | ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℕ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnge1d.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℕ) | |
| 2 | nnmulcld.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℕ) | |
| 3 | nnmulcl 9334 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 · 𝐵) ∈ ℕ) | |
| 4 | 1, 2, 3 | syl2anc 415 | 1 ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℕ) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 (class class class)co 6088 · cmul 8190 ℕcn 9313 |
| 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-mulcom 8286 ax-addass 8287 ax-mulass 8288 ax-distr 8289 ax-1rid 8292 ax-cnre 8296 |
| 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 |
| This theorem is used by: qbtwnre 10708 bcval 11209 bcm1k 11220 bcp1n 11221 permnn 11232 cvg1nlemcxze 11770 cvg1nlemf 11771 cvg1nlemcau 11772 cvg1nlemres 11773 trireciplem 12292 efaddlem 12466 eftlub 12482 eirraplem 12569 modmulconst 12615 lcmval 12866 nnmaxpwlemxy 12973 nnmaxpwlemparts 12977 sqpweven 12980 2sqpwodd 12981 crth 13031 phimullem 13032 modprm0 13062 pcqmul 13111 pcaddlem 13147 pcbc 13159 oddprmdvds 13162 pockthlem 13164 pockthg 13165 4sqlem13m 13211 4sqlem14 13212 4sqlem17 13215 4sqlem18 13216 evenennn 13342 zprmlogbaplem3 16217 log2tlbndlog2 16220 log2ublem2 16222 log2ublog2 16224 mpodvdsmulf1o 16284 fsumdvdsmul 16285 sgmmul 16290 chtublem 16295 bcmono 16304 bposlem3 16313 bposlem5 16315 gausslemma2dlem1a 16382 lgseisenlem2 16395 lgseisenlem4 16397 lgsquadlemsfi 16399 lgsquadlem2 16402 lgsquadlem3 16403 lgsquad2lem2 16406 2sqlem6 16444 |
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