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| Mirrors > Home > MPE Home > Th. List > nn0mulcl | Structured version Visualization version GIF version | ||
| Description: Closure of multiplication of nonnegative integers. (Contributed by NM, 22-Jul-2004.) (Proof shortened by Mario Carneiro, 17-Jul-2014.) |
| Ref | Expression |
|---|---|
| nn0mulcl | ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → (𝑀 · 𝑁) ∈ ℕ0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnsscn 12133 | . 2 ⊢ ℕ ⊆ ℂ | |
| 2 | id 22 | . . 3 ⊢ (ℕ ⊆ ℂ → ℕ ⊆ ℂ) | |
| 3 | df-n0 12385 | . . 3 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 4 | nnmulcl 12152 | . . . 4 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑀 · 𝑁) ∈ ℕ) | |
| 5 | 4 | adantl 481 | . . 3 ⊢ ((ℕ ⊆ ℂ ∧ (𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → (𝑀 · 𝑁) ∈ ℕ) |
| 6 | 2, 3, 5 | un0mulcl 12418 | . 2 ⊢ ((ℕ ⊆ ℂ ∧ (𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0)) → (𝑀 · 𝑁) ∈ ℕ0) |
| 7 | 1, 6 | mpan 690 | 1 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → (𝑀 · 𝑁) ∈ ℕ0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2109 ⊆ wss 3903 (class class class)co 7349 ℂcc 11007 · cmul 11014 ℕcn 12128 ℕ0cn0 12384 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5235 ax-nul 5245 ax-pow 5304 ax-pr 5371 ax-un 7671 ax-resscn 11066 ax-1cn 11067 ax-icn 11068 ax-addcl 11069 ax-addrcl 11070 ax-mulcl 11071 ax-mulrcl 11072 ax-mulcom 11073 ax-addass 11074 ax-mulass 11075 ax-distr 11076 ax-i2m1 11077 ax-1ne0 11078 ax-1rid 11079 ax-rnegex 11080 ax-rrecex 11081 ax-cnre 11082 ax-pre-lttri 11083 ax-pre-lttrn 11084 ax-pre-ltadd 11085 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3344 df-rab 3395 df-v 3438 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4285 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4859 df-iun 4943 df-br 5093 df-opab 5155 df-mpt 5174 df-tr 5200 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6249 df-ord 6310 df-on 6311 df-lim 6312 df-suc 6313 df-iota 6438 df-fun 6484 df-fn 6485 df-f 6486 df-f1 6487 df-fo 6488 df-f1o 6489 df-fv 6490 df-ov 7352 df-om 7800 df-2nd 7925 df-frecs 8214 df-wrecs 8245 df-recs 8294 df-rdg 8332 df-er 8625 df-en 8873 df-dom 8874 df-sdom 8875 df-pnf 11151 df-mnf 11152 df-ltxr 11154 df-nn 12129 df-n0 12385 |
| This theorem is referenced by: nn0mulcli 12422 nn0mulcld 12450 zmulcl 12524 nn0expcl 13982 expmul 14014 expmulnbnd 14142 iseraltlem2 15590 iseraltlem3 15591 fprodnn0cl 15864 nn0risefaccl 15929 crth 16689 iserodd 16747 vdwlem8 16900 smndex2dlinvh 18791 nn0srg 21344 elqaalem2 26226 atantayl3 26847 leibpilem2 26849 leibpi 26850 leibpisum 26851 log2cnv 26852 log2tlbnd 26853 log2ublem2 26855 log2ub 26857 basellem3 26991 chtublem 27120 bcmax 27187 bcp1ctr 27188 bclbnd 27189 dchrisumlem1 27398 nn0xmulclb 32714 |
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