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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 9164 | . 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 6018 · cmul 8037 ℕcn 9143 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-sep 4207 ax-cnex 8123 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-mulcom 8133 ax-addass 8134 ax-mulass 8135 ax-distr 8136 ax-1rid 8139 ax-cnre 8143 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-iota 5286 df-fv 5334 df-ov 6021 df-inn 9144 |
| This theorem is referenced by: qbtwnre 10517 bcval 11012 bcm1k 11023 bcp1n 11024 permnn 11034 cvg1nlemcxze 11547 cvg1nlemf 11548 cvg1nlemcau 11549 cvg1nlemres 11550 trireciplem 12066 efaddlem 12240 eftlub 12256 eirraplem 12343 modmulconst 12389 lcmval 12640 oddpwdclemxy 12746 oddpwdclemdc 12750 sqpweven 12752 2sqpwodd 12753 crth 12801 phimullem 12802 modprm0 12832 pcqmul 12881 pcaddlem 12917 pcbc 12929 oddprmdvds 12932 pockthlem 12934 pockthg 12935 4sqlem13m 12981 4sqlem14 12982 4sqlem17 12985 4sqlem18 12986 evenennn 13019 mpodvdsmulf1o 15720 fsumdvdsmul 15721 sgmmul 15726 gausslemma2dlem1a 15793 lgseisenlem2 15806 lgseisenlem4 15808 lgsquadlemsfi 15810 lgsquadlem2 15813 lgsquadlem3 15814 lgsquad2lem2 15817 2sqlem6 15855 |
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