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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 9206 | . 2 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 · 𝐵) ∈ ℕ) | |
| 4 | 1, 2, 3 | syl2anc 411 | 1 ⊢ (𝜑 → (𝐴 · 𝐵) ∈ ℕ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2202 (class class class)co 6028 · cmul 8080 ℕcn 9185 |
| 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 2213 ax-sep 4212 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-mulcom 8176 ax-addass 8177 ax-mulass 8178 ax-distr 8179 ax-1rid 8182 ax-cnre 8186 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-br 4094 df-iota 5293 df-fv 5341 df-ov 6031 df-inn 9186 |
| This theorem is referenced by: qbtwnre 10562 bcval 11057 bcm1k 11068 bcp1n 11069 permnn 11079 cvg1nlemcxze 11605 cvg1nlemf 11606 cvg1nlemcau 11607 cvg1nlemres 11608 trireciplem 12124 efaddlem 12298 eftlub 12314 eirraplem 12401 modmulconst 12447 lcmval 12698 oddpwdclemxy 12804 oddpwdclemdc 12808 sqpweven 12810 2sqpwodd 12811 crth 12859 phimullem 12860 modprm0 12890 pcqmul 12939 pcaddlem 12975 pcbc 12987 oddprmdvds 12990 pockthlem 12992 pockthg 12993 4sqlem13m 13039 4sqlem14 13040 4sqlem17 13043 4sqlem18 13044 evenennn 13077 mpodvdsmulf1o 15787 fsumdvdsmul 15788 sgmmul 15793 gausslemma2dlem1a 15860 lgseisenlem2 15873 lgseisenlem4 15875 lgsquadlemsfi 15877 lgsquadlem2 15880 lgsquadlem3 15881 lgsquad2lem2 15884 2sqlem6 15922 |
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