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Mirrors > Home > MPE Home > Th. List > dec5dvds | Structured version Visualization version GIF version |
Description: Divisibility by five is obvious in base 10. (Contributed by Mario Carneiro, 19-Apr-2015.) |
Ref | Expression |
---|---|
dec5dvds.1 | ⊢ 𝐴 ∈ ℕ0 |
dec5dvds.2 | ⊢ 𝐵 ∈ ℕ |
dec5dvds.3 | ⊢ 𝐵 < 5 |
Ref | Expression |
---|---|
dec5dvds | ⊢ ¬ 5 ∥ ;𝐴𝐵 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 5nn 11760 | . 2 ⊢ 5 ∈ ℕ | |
2 | 2nn0 11951 | . . 3 ⊢ 2 ∈ ℕ0 | |
3 | dec5dvds.1 | . . 3 ⊢ 𝐴 ∈ ℕ0 | |
4 | 2, 3 | nn0mulcli 11972 | . 2 ⊢ (2 · 𝐴) ∈ ℕ0 |
5 | dec5dvds.2 | . 2 ⊢ 𝐵 ∈ ℕ | |
6 | 5cn 11762 | . . . . . 6 ⊢ 5 ∈ ℂ | |
7 | 2cn 11749 | . . . . . 6 ⊢ 2 ∈ ℂ | |
8 | 3 | nn0cni 11946 | . . . . . 6 ⊢ 𝐴 ∈ ℂ |
9 | 6, 7, 8 | mulassi 10690 | . . . . 5 ⊢ ((5 · 2) · 𝐴) = (5 · (2 · 𝐴)) |
10 | 5t2e10 12237 | . . . . . 6 ⊢ (5 · 2) = ;10 | |
11 | 10 | oveq1i 7160 | . . . . 5 ⊢ ((5 · 2) · 𝐴) = (;10 · 𝐴) |
12 | 9, 11 | eqtr3i 2783 | . . . 4 ⊢ (5 · (2 · 𝐴)) = (;10 · 𝐴) |
13 | 12 | oveq1i 7160 | . . 3 ⊢ ((5 · (2 · 𝐴)) + 𝐵) = ((;10 · 𝐴) + 𝐵) |
14 | dfdec10 12140 | . . 3 ⊢ ;𝐴𝐵 = ((;10 · 𝐴) + 𝐵) | |
15 | 13, 14 | eqtr4i 2784 | . 2 ⊢ ((5 · (2 · 𝐴)) + 𝐵) = ;𝐴𝐵 |
16 | dec5dvds.3 | . 2 ⊢ 𝐵 < 5 | |
17 | 1, 4, 5, 15, 16 | ndvdsi 15813 | 1 ⊢ ¬ 5 ∥ ;𝐴𝐵 |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ∈ wcel 2111 class class class wbr 5032 (class class class)co 7150 0cc0 10575 1c1 10576 + caddc 10578 · cmul 10580 < clt 10713 ℕcn 11674 2c2 11729 5c5 11732 ℕ0cn0 11934 ;cdc 12137 ∥ cdvds 15655 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-sep 5169 ax-nul 5176 ax-pow 5234 ax-pr 5298 ax-un 7459 ax-cnex 10631 ax-resscn 10632 ax-1cn 10633 ax-icn 10634 ax-addcl 10635 ax-addrcl 10636 ax-mulcl 10637 ax-mulrcl 10638 ax-mulcom 10639 ax-addass 10640 ax-mulass 10641 ax-distr 10642 ax-i2m1 10643 ax-1ne0 10644 ax-1rid 10645 ax-rnegex 10646 ax-rrecex 10647 ax-cnre 10648 ax-pre-lttri 10649 ax-pre-lttrn 10650 ax-pre-ltadd 10651 ax-pre-mulgt0 10652 ax-pre-sup 10653 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-nel 3056 df-ral 3075 df-rex 3076 df-reu 3077 df-rmo 3078 df-rab 3079 df-v 3411 df-sbc 3697 df-csb 3806 df-dif 3861 df-un 3863 df-in 3865 df-ss 3875 df-pss 3877 df-nul 4226 df-if 4421 df-pw 4496 df-sn 4523 df-pr 4525 df-tp 4527 df-op 4529 df-uni 4799 df-iun 4885 df-br 5033 df-opab 5095 df-mpt 5113 df-tr 5139 df-id 5430 df-eprel 5435 df-po 5443 df-so 5444 df-fr 5483 df-we 5485 df-xp 5530 df-rel 5531 df-cnv 5532 df-co 5533 df-dm 5534 df-rn 5535 df-res 5536 df-ima 5537 df-pred 6126 df-ord 6172 df-on 6173 df-lim 6174 df-suc 6175 df-iota 6294 df-fun 6337 df-fn 6338 df-f 6339 df-f1 6340 df-fo 6341 df-f1o 6342 df-fv 6343 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-om 7580 df-1st 7693 df-2nd 7694 df-wrecs 7957 df-recs 8018 df-rdg 8056 df-er 8299 df-en 8528 df-dom 8529 df-sdom 8530 df-sup 8939 df-inf 8940 df-pnf 10715 df-mnf 10716 df-xr 10717 df-ltxr 10718 df-le 10719 df-sub 10910 df-neg 10911 df-div 11336 df-nn 11675 df-2 11737 df-3 11738 df-4 11739 df-5 11740 df-6 11741 df-7 11742 df-8 11743 df-9 11744 df-n0 11935 df-z 12021 df-dec 12138 df-uz 12283 df-rp 12431 df-fz 12940 df-seq 13419 df-exp 13480 df-cj 14506 df-re 14507 df-im 14508 df-sqrt 14642 df-abs 14643 df-dvds 15656 |
This theorem is referenced by: dec5dvds2 16456 43prm 16513 83prm 16514 163prm 16516 631prm 16518 31prm 44504 |
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