Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > emoo | Structured version Visualization version GIF version |
Description: The difference of an even and an odd is odd. (Contributed by AV, 24-Jul-2020.) |
Ref | Expression |
---|---|
emoo | ⊢ ((𝐴 ∈ Even ∧ 𝐵 ∈ Odd ) → (𝐴 − 𝐵) ∈ Odd ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | evenz 44783 | . . . 4 ⊢ (𝐴 ∈ Even → 𝐴 ∈ ℤ) | |
2 | 1 | zcnd 12307 | . . 3 ⊢ (𝐴 ∈ Even → 𝐴 ∈ ℂ) |
3 | oddz 44784 | . . . 4 ⊢ (𝐵 ∈ Odd → 𝐵 ∈ ℤ) | |
4 | 3 | zcnd 12307 | . . 3 ⊢ (𝐵 ∈ Odd → 𝐵 ∈ ℂ) |
5 | negsub 11150 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 + -𝐵) = (𝐴 − 𝐵)) | |
6 | 2, 4, 5 | syl2an 599 | . 2 ⊢ ((𝐴 ∈ Even ∧ 𝐵 ∈ Odd ) → (𝐴 + -𝐵) = (𝐴 − 𝐵)) |
7 | onego 44799 | . . 3 ⊢ (𝐵 ∈ Odd → -𝐵 ∈ Odd ) | |
8 | epoo 44856 | . . 3 ⊢ ((𝐴 ∈ Even ∧ -𝐵 ∈ Odd ) → (𝐴 + -𝐵) ∈ Odd ) | |
9 | 7, 8 | sylan2 596 | . 2 ⊢ ((𝐴 ∈ Even ∧ 𝐵 ∈ Odd ) → (𝐴 + -𝐵) ∈ Odd ) |
10 | 6, 9 | eqeltrrd 2840 | 1 ⊢ ((𝐴 ∈ Even ∧ 𝐵 ∈ Odd ) → (𝐴 − 𝐵) ∈ Odd ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1543 ∈ wcel 2111 (class class class)co 7231 ℂcc 10751 + caddc 10756 − cmin 11086 -cneg 11087 Even ceven 44777 Odd codd 44778 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2159 ax-12 2176 ax-ext 2709 ax-sep 5206 ax-nul 5213 ax-pow 5272 ax-pr 5336 ax-un 7541 ax-resscn 10810 ax-1cn 10811 ax-icn 10812 ax-addcl 10813 ax-addrcl 10814 ax-mulcl 10815 ax-mulrcl 10816 ax-mulcom 10817 ax-addass 10818 ax-mulass 10819 ax-distr 10820 ax-i2m1 10821 ax-1ne0 10822 ax-1rid 10823 ax-rnegex 10824 ax-rrecex 10825 ax-cnre 10826 ax-pre-lttri 10827 ax-pre-lttrn 10828 ax-pre-ltadd 10829 ax-pre-mulgt0 10830 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2072 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3067 df-rex 3068 df-reu 3069 df-rmo 3070 df-rab 3071 df-v 3422 df-sbc 3709 df-csb 3826 df-dif 3883 df-un 3885 df-in 3887 df-ss 3897 df-pss 3899 df-nul 4252 df-if 4454 df-pw 4529 df-sn 4556 df-pr 4558 df-tp 4560 df-op 4562 df-uni 4834 df-iun 4920 df-br 5068 df-opab 5130 df-mpt 5150 df-tr 5176 df-id 5469 df-eprel 5474 df-po 5482 df-so 5483 df-fr 5523 df-we 5525 df-xp 5571 df-rel 5572 df-cnv 5573 df-co 5574 df-dm 5575 df-rn 5576 df-res 5577 df-ima 5578 df-pred 6175 df-ord 6233 df-on 6234 df-lim 6235 df-suc 6236 df-iota 6355 df-fun 6399 df-fn 6400 df-f 6401 df-f1 6402 df-fo 6403 df-f1o 6404 df-fv 6405 df-riota 7188 df-ov 7234 df-oprab 7235 df-mpo 7236 df-om 7663 df-wrecs 8067 df-recs 8128 df-rdg 8166 df-er 8411 df-en 8647 df-dom 8648 df-sdom 8649 df-pnf 10893 df-mnf 10894 df-xr 10895 df-ltxr 10896 df-le 10897 df-sub 11088 df-neg 11089 df-div 11514 df-nn 11855 df-2 11917 df-n0 12115 df-z 12201 df-even 44779 df-odd 44780 |
This theorem is referenced by: even3prm2 44872 evengpop3 44951 evengpoap3 44952 nnsum4primeseven 44953 nnsum4primesevenALTV 44954 |
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