Mathbox for Alexander van der Vekens |
< Previous
Next >
Nearby theorems |
||
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 43786 | . . . 4 ⊢ (𝑍 ∈ Even ↔ (𝑍 ∈ ℤ ∧ (𝑍 / 2) ∈ ℤ)) | |
2 | zeo2 12063 | . . . . . 6 ⊢ (𝑍 ∈ ℤ → ((𝑍 / 2) ∈ ℤ ↔ ¬ ((𝑍 + 1) / 2) ∈ ℤ)) | |
3 | 2 | biimpd 231 | . . . . 5 ⊢ (𝑍 ∈ ℤ → ((𝑍 / 2) ∈ ℤ → ¬ ((𝑍 + 1) / 2) ∈ ℤ)) |
4 | 3 | imp 409 | . . . 4 ⊢ ((𝑍 ∈ ℤ ∧ (𝑍 / 2) ∈ ℤ) → ¬ ((𝑍 + 1) / 2) ∈ ℤ) |
5 | 1, 4 | sylbi 219 | . . 3 ⊢ (𝑍 ∈ Even → ¬ ((𝑍 + 1) / 2) ∈ ℤ) |
6 | 5 | olcd 870 | . 2 ⊢ (𝑍 ∈ Even → (¬ 𝑍 ∈ ℤ ∨ ¬ ((𝑍 + 1) / 2) ∈ ℤ)) |
7 | isodd 43787 | . . . 4 ⊢ (𝑍 ∈ Odd ↔ (𝑍 ∈ ℤ ∧ ((𝑍 + 1) / 2) ∈ ℤ)) | |
8 | 7 | notbii 322 | . . 3 ⊢ (¬ 𝑍 ∈ Odd ↔ ¬ (𝑍 ∈ ℤ ∧ ((𝑍 + 1) / 2) ∈ ℤ)) |
9 | ianor 978 | . . 3 ⊢ (¬ (𝑍 ∈ ℤ ∧ ((𝑍 + 1) / 2) ∈ ℤ) ↔ (¬ 𝑍 ∈ ℤ ∨ ¬ ((𝑍 + 1) / 2) ∈ ℤ)) | |
10 | 8, 9 | bitri 277 | . 2 ⊢ (¬ 𝑍 ∈ Odd ↔ (¬ 𝑍 ∈ ℤ ∨ ¬ ((𝑍 + 1) / 2) ∈ ℤ)) |
11 | 6, 10 | sylibr 236 | 1 ⊢ (𝑍 ∈ Even → ¬ 𝑍 ∈ Odd ) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 398 ∨ wo 843 ∈ wcel 2110 (class class class)co 7150 1c1 10532 + caddc 10534 / cdiv 11291 2c2 11686 ℤcz 11975 Even ceven 43782 Odd codd 43783 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3497 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4833 df-iun 4914 df-br 5060 df-opab 5122 df-mpt 5140 df-tr 5166 df-id 5455 df-eprel 5460 df-po 5469 df-so 5470 df-fr 5509 df-we 5511 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-pred 6143 df-ord 6189 df-on 6190 df-lim 6191 df-suc 6192 df-iota 6309 df-fun 6352 df-fn 6353 df-f 6354 df-f1 6355 df-fo 6356 df-f1o 6357 df-fv 6358 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-om 7575 df-wrecs 7941 df-recs 8002 df-rdg 8040 df-er 8283 df-en 8504 df-dom 8505 df-sdom 8506 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 df-div 11292 df-nn 11633 df-2 11694 df-n0 11892 df-z 11976 df-even 43784 df-odd 43785 |
This theorem is referenced by: zeo2ALTV 43829 bits0eALTV 43838 odd2prm2 43876 gbowge7 43921 stgoldbwt 43934 sbgoldbwt 43935 bgoldbtbndlem1 43963 |
Copyright terms: Public domain | W3C validator |