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Mirrors > Home > MPE Home > Th. List > zmulcl | Structured version Visualization version GIF version |
Description: Closure of multiplication of integers. (Contributed by NM, 30-Jul-2004.) |
Ref | Expression |
---|---|
zmulcl | ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 · 𝑁) ∈ ℤ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elznn0 12334 | . 2 ⊢ (𝑀 ∈ ℤ ↔ (𝑀 ∈ ℝ ∧ (𝑀 ∈ ℕ0 ∨ -𝑀 ∈ ℕ0))) | |
2 | elznn0 12334 | . 2 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0))) | |
3 | nn0mulcl 12269 | . . . . . . . . 9 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → (𝑀 · 𝑁) ∈ ℕ0) | |
4 | 3 | orcd 870 | . . . . . . . 8 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0)) |
5 | 4 | a1i 11 | . . . . . . 7 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0))) |
6 | remulcl 10956 | . . . . . . 7 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (𝑀 · 𝑁) ∈ ℝ) | |
7 | 5, 6 | jctild 526 | . . . . . 6 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → ((𝑀 · 𝑁) ∈ ℝ ∧ ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0)))) |
8 | nn0mulcl 12269 | . . . . . . . . 9 ⊢ ((-𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → (-𝑀 · 𝑁) ∈ ℕ0) | |
9 | recn 10961 | . . . . . . . . . . 11 ⊢ (𝑀 ∈ ℝ → 𝑀 ∈ ℂ) | |
10 | recn 10961 | . . . . . . . . . . 11 ⊢ (𝑁 ∈ ℝ → 𝑁 ∈ ℂ) | |
11 | mulneg1 11411 | . . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → (-𝑀 · 𝑁) = -(𝑀 · 𝑁)) | |
12 | 9, 10, 11 | syl2an 596 | . . . . . . . . . 10 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (-𝑀 · 𝑁) = -(𝑀 · 𝑁)) |
13 | 12 | eleq1d 2823 | . . . . . . . . 9 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((-𝑀 · 𝑁) ∈ ℕ0 ↔ -(𝑀 · 𝑁) ∈ ℕ0)) |
14 | 8, 13 | syl5ib 243 | . . . . . . . 8 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((-𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → -(𝑀 · 𝑁) ∈ ℕ0)) |
15 | olc 865 | . . . . . . . 8 ⊢ (-(𝑀 · 𝑁) ∈ ℕ0 → ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0)) | |
16 | 14, 15 | syl6 35 | . . . . . . 7 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((-𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0))) |
17 | 16, 6 | jctild 526 | . . . . . 6 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((-𝑀 ∈ ℕ0 ∧ 𝑁 ∈ ℕ0) → ((𝑀 · 𝑁) ∈ ℝ ∧ ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0)))) |
18 | nn0mulcl 12269 | . . . . . . . . 9 ⊢ ((𝑀 ∈ ℕ0 ∧ -𝑁 ∈ ℕ0) → (𝑀 · -𝑁) ∈ ℕ0) | |
19 | mulneg2 11412 | . . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → (𝑀 · -𝑁) = -(𝑀 · 𝑁)) | |
20 | 9, 10, 19 | syl2an 596 | . . . . . . . . . 10 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (𝑀 · -𝑁) = -(𝑀 · 𝑁)) |
21 | 20 | eleq1d 2823 | . . . . . . . . 9 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((𝑀 · -𝑁) ∈ ℕ0 ↔ -(𝑀 · 𝑁) ∈ ℕ0)) |
22 | 18, 21 | syl5ib 243 | . . . . . . . 8 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((𝑀 ∈ ℕ0 ∧ -𝑁 ∈ ℕ0) → -(𝑀 · 𝑁) ∈ ℕ0)) |
23 | 22, 15 | syl6 35 | . . . . . . 7 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((𝑀 ∈ ℕ0 ∧ -𝑁 ∈ ℕ0) → ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0))) |
24 | 23, 6 | jctild 526 | . . . . . 6 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((𝑀 ∈ ℕ0 ∧ -𝑁 ∈ ℕ0) → ((𝑀 · 𝑁) ∈ ℝ ∧ ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0)))) |
25 | nn0mulcl 12269 | . . . . . . . . 9 ⊢ ((-𝑀 ∈ ℕ0 ∧ -𝑁 ∈ ℕ0) → (-𝑀 · -𝑁) ∈ ℕ0) | |
26 | mul2neg 11414 | . . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → (-𝑀 · -𝑁) = (𝑀 · 𝑁)) | |
27 | 9, 10, 26 | syl2an 596 | . . . . . . . . . 10 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (-𝑀 · -𝑁) = (𝑀 · 𝑁)) |
28 | 27 | eleq1d 2823 | . . . . . . . . 9 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((-𝑀 · -𝑁) ∈ ℕ0 ↔ (𝑀 · 𝑁) ∈ ℕ0)) |
29 | 25, 28 | syl5ib 243 | . . . . . . . 8 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((-𝑀 ∈ ℕ0 ∧ -𝑁 ∈ ℕ0) → (𝑀 · 𝑁) ∈ ℕ0)) |
30 | orc 864 | . . . . . . . 8 ⊢ ((𝑀 · 𝑁) ∈ ℕ0 → ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0)) | |
31 | 29, 30 | syl6 35 | . . . . . . 7 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((-𝑀 ∈ ℕ0 ∧ -𝑁 ∈ ℕ0) → ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0))) |
32 | 31, 6 | jctild 526 | . . . . . 6 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → ((-𝑀 ∈ ℕ0 ∧ -𝑁 ∈ ℕ0) → ((𝑀 · 𝑁) ∈ ℝ ∧ ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0)))) |
33 | 7, 17, 24, 32 | ccased 1036 | . . . . 5 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (((𝑀 ∈ ℕ0 ∨ -𝑀 ∈ ℕ0) ∧ (𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0)) → ((𝑀 · 𝑁) ∈ ℝ ∧ ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0)))) |
34 | elznn0 12334 | . . . . 5 ⊢ ((𝑀 · 𝑁) ∈ ℤ ↔ ((𝑀 · 𝑁) ∈ ℝ ∧ ((𝑀 · 𝑁) ∈ ℕ0 ∨ -(𝑀 · 𝑁) ∈ ℕ0))) | |
35 | 33, 34 | syl6ibr 251 | . . . 4 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (((𝑀 ∈ ℕ0 ∨ -𝑀 ∈ ℕ0) ∧ (𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0)) → (𝑀 · 𝑁) ∈ ℤ)) |
36 | 35 | imp 407 | . . 3 ⊢ (((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) ∧ ((𝑀 ∈ ℕ0 ∨ -𝑀 ∈ ℕ0) ∧ (𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0))) → (𝑀 · 𝑁) ∈ ℤ) |
37 | 36 | an4s 657 | . 2 ⊢ (((𝑀 ∈ ℝ ∧ (𝑀 ∈ ℕ0 ∨ -𝑀 ∈ ℕ0)) ∧ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0))) → (𝑀 · 𝑁) ∈ ℤ) |
38 | 1, 2, 37 | syl2anb 598 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 · 𝑁) ∈ ℤ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∨ wo 844 = wceq 1539 ∈ wcel 2106 (class class class)co 7275 ℂcc 10869 ℝcr 10870 · cmul 10876 -cneg 11206 ℕ0cn0 12233 ℤcz 12319 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-pnf 11011 df-mnf 11012 df-ltxr 11014 df-sub 11207 df-neg 11208 df-nn 11974 df-n0 12234 df-z 12320 |
This theorem is referenced by: zdivmul 12392 msqznn 12402 zmulcld 12432 uz2mulcl 12666 qaddcl 12705 qmulcl 12707 qreccl 12709 fzctr 13368 flmulnn0 13547 zexpcl 13797 iexpcyc 13923 zesq 13941 cshweqrep 14534 fprodzcl 15664 zrisefaccl 15730 zfallfaccl 15731 dvdsmul1 15987 dvdsmul2 15988 muldvds1 15990 muldvds2 15991 dvdscmul 15992 dvdsmulc 15993 dvdscmulr 15994 dvdsmulcr 15995 dvds2ln 15998 dvdstr 16003 dvdsmultr1 16005 dvdsmultr2 16007 3dvdsdec 16041 3dvds2dec 16042 oexpneg 16054 mulsucdiv2z 16062 divalglem0 16102 divalglem2 16104 divalglem4 16105 divalglem8 16109 divalgb 16113 divalgmod 16115 ndvdsi 16121 gcdaddmlem 16231 absmulgcd 16257 gcdmultipleOLD 16260 gcdmultiplezOLD 16261 dvdsmulgcd 16265 rpmulgcd 16266 lcmcllem 16301 rpmul 16364 cncongr1 16372 cncongr2 16373 eulerthlem2 16483 modprminv 16500 modprminveq 16501 modprm0 16506 pythagtriplem4 16520 pcpremul 16544 pcmul 16552 gzmulcl 16639 pgpfac1lem2 19678 zsubrg 20651 dvdsrzring 20683 mulgrhm 20699 domnchr 20736 znfld 20768 znunit 20771 mbfi1fseqlem5 24884 dvexp3 25142 basellem2 26231 basellem5 26234 dvdsflf1o 26336 chtub 26360 bposlem1 26432 bposlem5 26436 bposlem6 26437 lgslem3 26447 lgsval4a 26467 lgsneg 26469 lgsdir2 26478 lgsdchr 26503 lgseisenlem1 26523 lgseisenlem2 26524 lgseisenlem3 26525 lgsquadlem1 26528 lgsquad2lem2 26533 2lgsoddprmlem2 26557 chebbnd1lem1 26617 chebbnd1lem3 26619 knoppndvlem2 34693 fzmul 35899 mzpclall 40549 mzpindd 40568 acongrep 40802 acongeq 40805 jm2.18 40810 jm2.21 40816 jm2.26a 40822 jm2.26 40824 jm2.16nn0 40826 jm2.27a 40827 jm2.27c 40829 jm3.1lem3 40841 fourierswlem 43771 oexpnegALTV 45129 oexpnegnz 45130 tgblthelfgott 45267 2zrngmmgm 45504 zlmodzxzequa 45837 zlmodzxzequap 45840 |
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