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Mirrors > Home > MPE Home > Th. List > Mathboxes > evennodd | Structured version Visualization version GIF version |
Description: An even number is not an odd number. (Contributed by AV, 16-Jun-2020.) |
Ref | Expression |
---|---|
evennodd | ⊢ (𝑍 ∈ Even → ¬ 𝑍 ∈ Odd ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | iseven 45049 | . . . 4 ⊢ (𝑍 ∈ Even ↔ (𝑍 ∈ ℤ ∧ (𝑍 / 2) ∈ ℤ)) | |
2 | zeo2 12407 | . . . . . 6 ⊢ (𝑍 ∈ ℤ → ((𝑍 / 2) ∈ ℤ ↔ ¬ ((𝑍 + 1) / 2) ∈ ℤ)) | |
3 | 2 | biimpd 228 | . . . . 5 ⊢ (𝑍 ∈ ℤ → ((𝑍 / 2) ∈ ℤ → ¬ ((𝑍 + 1) / 2) ∈ ℤ)) |
4 | 3 | imp 407 | . . . 4 ⊢ ((𝑍 ∈ ℤ ∧ (𝑍 / 2) ∈ ℤ) → ¬ ((𝑍 + 1) / 2) ∈ ℤ) |
5 | 1, 4 | sylbi 216 | . . 3 ⊢ (𝑍 ∈ Even → ¬ ((𝑍 + 1) / 2) ∈ ℤ) |
6 | 5 | olcd 871 | . 2 ⊢ (𝑍 ∈ Even → (¬ 𝑍 ∈ ℤ ∨ ¬ ((𝑍 + 1) / 2) ∈ ℤ)) |
7 | isodd 45050 | . . . 4 ⊢ (𝑍 ∈ Odd ↔ (𝑍 ∈ ℤ ∧ ((𝑍 + 1) / 2) ∈ ℤ)) | |
8 | 7 | notbii 320 | . . 3 ⊢ (¬ 𝑍 ∈ Odd ↔ ¬ (𝑍 ∈ ℤ ∧ ((𝑍 + 1) / 2) ∈ ℤ)) |
9 | ianor 979 | . . 3 ⊢ (¬ (𝑍 ∈ ℤ ∧ ((𝑍 + 1) / 2) ∈ ℤ) ↔ (¬ 𝑍 ∈ ℤ ∨ ¬ ((𝑍 + 1) / 2) ∈ ℤ)) | |
10 | 8, 9 | bitri 274 | . 2 ⊢ (¬ 𝑍 ∈ Odd ↔ (¬ 𝑍 ∈ ℤ ∨ ¬ ((𝑍 + 1) / 2) ∈ ℤ)) |
11 | 6, 10 | sylibr 233 | 1 ⊢ (𝑍 ∈ Even → ¬ 𝑍 ∈ Odd ) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 ∨ wo 844 ∈ wcel 2110 (class class class)co 7271 1c1 10873 + caddc 10875 / cdiv 11632 2c2 12028 ℤcz 12319 Even ceven 45045 Odd codd 45046 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7582 ax-resscn 10929 ax-1cn 10930 ax-icn 10931 ax-addcl 10932 ax-addrcl 10933 ax-mulcl 10934 ax-mulrcl 10935 ax-mulcom 10936 ax-addass 10937 ax-mulass 10938 ax-distr 10939 ax-i2m1 10940 ax-1ne0 10941 ax-1rid 10942 ax-rnegex 10943 ax-rrecex 10944 ax-cnre 10945 ax-pre-lttri 10946 ax-pre-lttrn 10947 ax-pre-ltadd 10948 ax-pre-mulgt0 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-nel 3052 df-ral 3071 df-rex 3072 df-reu 3073 df-rmo 3074 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4846 df-iun 4932 df-br 5080 df-opab 5142 df-mpt 5163 df-tr 5197 df-id 5490 df-eprel 5496 df-po 5504 df-so 5505 df-fr 5545 df-we 5547 df-xp 5596 df-rel 5597 df-cnv 5598 df-co 5599 df-dm 5600 df-rn 5601 df-res 5602 df-ima 5603 df-pred 6201 df-ord 6268 df-on 6269 df-lim 6270 df-suc 6271 df-iota 6390 df-fun 6434 df-fn 6435 df-f 6436 df-f1 6437 df-fo 6438 df-f1o 6439 df-fv 6440 df-riota 7228 df-ov 7274 df-oprab 7275 df-mpo 7276 df-om 7707 df-2nd 7825 df-frecs 8088 df-wrecs 8119 df-recs 8193 df-rdg 8232 df-er 8481 df-en 8717 df-dom 8718 df-sdom 8719 df-pnf 11012 df-mnf 11013 df-xr 11014 df-ltxr 11015 df-le 11016 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-n0 12234 df-z 12320 df-even 45047 df-odd 45048 |
This theorem is referenced by: zeo2ALTV 45092 bits0eALTV 45101 odd2prm2 45139 gbowge7 45184 stgoldbwt 45197 sbgoldbwt 45198 bgoldbtbndlem1 45226 |
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