Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > oddprm | Structured version Visualization version GIF version |
Description: A prime not equal to 2 is odd. (Contributed by Mario Carneiro, 4-Feb-2015.) (Proof shortened by AV, 10-Jul-2022.) |
Ref | Expression |
---|---|
oddprm | ⊢ (𝑁 ∈ (ℙ ∖ {2}) → ((𝑁 − 1) / 2) ∈ ℕ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldifi 4061 | . . . . 5 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → 𝑁 ∈ ℙ) | |
2 | prmz 16380 | . . . . 5 ⊢ (𝑁 ∈ ℙ → 𝑁 ∈ ℤ) | |
3 | 1, 2 | syl 17 | . . . 4 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → 𝑁 ∈ ℤ) |
4 | eldifsni 4723 | . . . . . . 7 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → 𝑁 ≠ 2) | |
5 | 4 | necomd 2999 | . . . . . 6 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → 2 ≠ 𝑁) |
6 | 5 | neneqd 2948 | . . . . 5 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → ¬ 2 = 𝑁) |
7 | 2z 12352 | . . . . . . 7 ⊢ 2 ∈ ℤ | |
8 | uzid 12597 | . . . . . . 7 ⊢ (2 ∈ ℤ → 2 ∈ (ℤ≥‘2)) | |
9 | 7, 8 | ax-mp 5 | . . . . . 6 ⊢ 2 ∈ (ℤ≥‘2) |
10 | dvdsprm 16408 | . . . . . 6 ⊢ ((2 ∈ (ℤ≥‘2) ∧ 𝑁 ∈ ℙ) → (2 ∥ 𝑁 ↔ 2 = 𝑁)) | |
11 | 9, 1, 10 | sylancr 587 | . . . . 5 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → (2 ∥ 𝑁 ↔ 2 = 𝑁)) |
12 | 6, 11 | mtbird 325 | . . . 4 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → ¬ 2 ∥ 𝑁) |
13 | 1z 12350 | . . . . 5 ⊢ 1 ∈ ℤ | |
14 | n2dvds1 16077 | . . . . 5 ⊢ ¬ 2 ∥ 1 | |
15 | omoe 16073 | . . . . 5 ⊢ (((𝑁 ∈ ℤ ∧ ¬ 2 ∥ 𝑁) ∧ (1 ∈ ℤ ∧ ¬ 2 ∥ 1)) → 2 ∥ (𝑁 − 1)) | |
16 | 13, 14, 15 | mpanr12 702 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ ¬ 2 ∥ 𝑁) → 2 ∥ (𝑁 − 1)) |
17 | 3, 12, 16 | syl2anc 584 | . . 3 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → 2 ∥ (𝑁 − 1)) |
18 | prmnn 16379 | . . . . 5 ⊢ (𝑁 ∈ ℙ → 𝑁 ∈ ℕ) | |
19 | nnm1nn0 12274 | . . . . 5 ⊢ (𝑁 ∈ ℕ → (𝑁 − 1) ∈ ℕ0) | |
20 | 1, 18, 19 | 3syl 18 | . . . 4 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → (𝑁 − 1) ∈ ℕ0) |
21 | nn0z 12343 | . . . 4 ⊢ ((𝑁 − 1) ∈ ℕ0 → (𝑁 − 1) ∈ ℤ) | |
22 | evend2 16066 | . . . 4 ⊢ ((𝑁 − 1) ∈ ℤ → (2 ∥ (𝑁 − 1) ↔ ((𝑁 − 1) / 2) ∈ ℤ)) | |
23 | 20, 21, 22 | 3syl 18 | . . 3 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → (2 ∥ (𝑁 − 1) ↔ ((𝑁 − 1) / 2) ∈ ℤ)) |
24 | 17, 23 | mpbid 231 | . 2 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → ((𝑁 − 1) / 2) ∈ ℤ) |
25 | prmuz2 16401 | . . 3 ⊢ (𝑁 ∈ ℙ → 𝑁 ∈ (ℤ≥‘2)) | |
26 | uz2m1nn 12663 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘2) → (𝑁 − 1) ∈ ℕ) | |
27 | nngt0 12004 | . . . 4 ⊢ ((𝑁 − 1) ∈ ℕ → 0 < (𝑁 − 1)) | |
28 | nnre 11980 | . . . . 5 ⊢ ((𝑁 − 1) ∈ ℕ → (𝑁 − 1) ∈ ℝ) | |
29 | 2rp 12735 | . . . . . 6 ⊢ 2 ∈ ℝ+ | |
30 | 29 | a1i 11 | . . . . 5 ⊢ ((𝑁 − 1) ∈ ℕ → 2 ∈ ℝ+) |
31 | 28, 30 | gt0divd 12809 | . . . 4 ⊢ ((𝑁 − 1) ∈ ℕ → (0 < (𝑁 − 1) ↔ 0 < ((𝑁 − 1) / 2))) |
32 | 27, 31 | mpbid 231 | . . 3 ⊢ ((𝑁 − 1) ∈ ℕ → 0 < ((𝑁 − 1) / 2)) |
33 | 1, 25, 26, 32 | 4syl 19 | . 2 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → 0 < ((𝑁 − 1) / 2)) |
34 | elnnz 12329 | . 2 ⊢ (((𝑁 − 1) / 2) ∈ ℕ ↔ (((𝑁 − 1) / 2) ∈ ℤ ∧ 0 < ((𝑁 − 1) / 2))) | |
35 | 24, 33, 34 | sylanbrc 583 | 1 ⊢ (𝑁 ∈ (ℙ ∖ {2}) → ((𝑁 − 1) / 2) ∈ ℕ) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ∖ cdif 3884 {csn 4561 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 0cc0 10871 1c1 10872 < clt 11009 − cmin 11205 / cdiv 11632 ℕcn 11973 2c2 12028 ℕ0cn0 12233 ℤcz 12319 ℤ≥cuz 12582 ℝ+crp 12730 ∥ cdvds 15963 ℙcprime 16376 |
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 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
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-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-2o 8298 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-sup 9201 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-rp 12731 df-seq 13722 df-exp 13783 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-dvds 15964 df-prm 16377 |
This theorem is referenced by: nnoddn2prm 16512 4sqlem19 16664 lgslem1 26445 lgslem4 26448 lgsval2lem 26455 lgsvalmod 26464 lgsmod 26471 lgsdirprm 26479 lgsne0 26483 lgsqrlem1 26494 lgsqrlem2 26495 lgsqrlem3 26496 lgsqrlem4 26497 gausslemma2dlem4 26517 lgseisenlem1 26523 lgseisenlem2 26524 lgseisenlem4 26526 lgseisen 26527 m1lgs 26536 2lgslem2 26543 fmtnoprmfac2 45019 |
Copyright terms: Public domain | W3C validator |