Mathbox for Alexander van der Vekens |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > Mathboxes > 8even | Structured version Visualization version GIF version |
Description: 8 is an even number. (Contributed by AV, 23-Jul-2020.) |
Ref | Expression |
---|---|
8even | ⊢ 8 ∈ Even |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 8nn 12056 | . . 3 ⊢ 8 ∈ ℕ | |
2 | 1 | nnzi 12332 | . 2 ⊢ 8 ∈ ℤ |
3 | 4t2e8 12129 | . . . . . 6 ⊢ (4 · 2) = 8 | |
4 | 3 | eqcomi 2747 | . . . . 5 ⊢ 8 = (4 · 2) |
5 | 4 | oveq1i 7278 | . . . 4 ⊢ (8 / 2) = ((4 · 2) / 2) |
6 | 4cn 12046 | . . . . 5 ⊢ 4 ∈ ℂ | |
7 | 2cn 12036 | . . . . 5 ⊢ 2 ∈ ℂ | |
8 | 2ne0 12065 | . . . . 5 ⊢ 2 ≠ 0 | |
9 | 6, 7, 8 | divcan4i 11710 | . . . 4 ⊢ ((4 · 2) / 2) = 4 |
10 | 5, 9 | eqtri 2766 | . . 3 ⊢ (8 / 2) = 4 |
11 | 4z 12342 | . . 3 ⊢ 4 ∈ ℤ | |
12 | 10, 11 | eqeltri 2835 | . 2 ⊢ (8 / 2) ∈ ℤ |
13 | iseven 45036 | . 2 ⊢ (8 ∈ Even ↔ (8 ∈ ℤ ∧ (8 / 2) ∈ ℤ)) | |
14 | 2, 12, 13 | mpbir2an 708 | 1 ⊢ 8 ∈ Even |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2106 (class class class)co 7268 · cmul 10864 / cdiv 11620 2c2 12016 4c4 12018 8c8 12022 ℤcz 12307 Even ceven 45032 |
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 5222 ax-nul 5229 ax-pow 5287 ax-pr 5351 ax-un 7579 ax-resscn 10916 ax-1cn 10917 ax-icn 10918 ax-addcl 10919 ax-addrcl 10920 ax-mulcl 10921 ax-mulrcl 10922 ax-mulcom 10923 ax-addass 10924 ax-mulass 10925 ax-distr 10926 ax-i2m1 10927 ax-1ne0 10928 ax-1rid 10929 ax-rnegex 10930 ax-rrecex 10931 ax-cnre 10932 ax-pre-lttri 10933 ax-pre-lttrn 10934 ax-pre-ltadd 10935 ax-pre-mulgt0 10936 |
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 3071 df-rmo 3072 df-rab 3073 df-v 3432 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4258 df-if 4461 df-pw 4536 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4841 df-iun 4927 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5485 df-eprel 5491 df-po 5499 df-so 5500 df-fr 5540 df-we 5542 df-xp 5591 df-rel 5592 df-cnv 5593 df-co 5594 df-dm 5595 df-rn 5596 df-res 5597 df-ima 5598 df-pred 6196 df-ord 6263 df-on 6264 df-lim 6265 df-suc 6266 df-iota 6385 df-fun 6429 df-fn 6430 df-f 6431 df-f1 6432 df-fo 6433 df-f1o 6434 df-fv 6435 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-om 7704 df-2nd 7822 df-frecs 8085 df-wrecs 8116 df-recs 8190 df-rdg 8229 df-er 8486 df-en 8722 df-dom 8723 df-sdom 8724 df-pnf 10999 df-mnf 11000 df-xr 11001 df-ltxr 11002 df-le 11003 df-sub 11195 df-neg 11196 df-div 11621 df-nn 11962 df-2 12024 df-3 12025 df-4 12026 df-5 12027 df-6 12028 df-7 12029 df-8 12030 df-z 12308 df-even 45034 |
This theorem is referenced by: 8gbe 45181 9gbo 45182 bgoldbtbndlem1 45213 |
Copyright terms: Public domain | W3C validator |