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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 9152 | . 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 2200 (class class class)co 6011 · cmul 8025 ℕcn 9131 |
| 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 4203 ax-cnex 8111 ax-resscn 8112 ax-1cn 8113 ax-1re 8114 ax-icn 8115 ax-addcl 8116 ax-addrcl 8117 ax-mulcl 8118 ax-mulcom 8121 ax-addass 8122 ax-mulass 8123 ax-distr 8124 ax-1rid 8127 ax-cnre 8131 |
| 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 2802 df-un 3202 df-in 3204 df-ss 3211 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3890 df-int 3925 df-br 4085 df-iota 5282 df-fv 5330 df-ov 6014 df-inn 9132 |
| This theorem is referenced by: qbtwnre 10504 bcval 10999 bcm1k 11010 bcp1n 11011 permnn 11021 cvg1nlemcxze 11530 cvg1nlemf 11531 cvg1nlemcau 11532 cvg1nlemres 11533 trireciplem 12048 efaddlem 12222 eftlub 12238 eirraplem 12325 modmulconst 12371 lcmval 12622 oddpwdclemxy 12728 oddpwdclemdc 12732 sqpweven 12734 2sqpwodd 12735 crth 12783 phimullem 12784 modprm0 12814 pcqmul 12863 pcaddlem 12899 pcbc 12911 oddprmdvds 12914 pockthlem 12916 pockthg 12917 4sqlem13m 12963 4sqlem14 12964 4sqlem17 12967 4sqlem18 12968 evenennn 13001 mpodvdsmulf1o 15701 fsumdvdsmul 15702 sgmmul 15707 gausslemma2dlem1a 15774 lgseisenlem2 15787 lgseisenlem4 15789 lgsquadlemsfi 15791 lgsquadlem2 15794 lgsquadlem3 15795 lgsquad2lem2 15798 2sqlem6 15836 |
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