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Mirrors > Home > ILE Home > Th. List > modprminv | GIF version |
Description: Show an explicit expression for the modular inverse of 𝐴 mod 𝑃. This is an application of prmdiv 12176. (Contributed by Alexander van der Vekens, 15-May-2018.) |
Ref | Expression |
---|---|
modprminv.1 | ⊢ 𝑅 = ((𝐴↑(𝑃 − 2)) mod 𝑃) |
Ref | Expression |
---|---|
modprminv | ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ ∧ ¬ 𝑃 ∥ 𝐴) → (𝑅 ∈ (1...(𝑃 − 1)) ∧ ((𝐴 · 𝑅) mod 𝑃) = 1)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | modprminv.1 | . . 3 ⊢ 𝑅 = ((𝐴↑(𝑃 − 2)) mod 𝑃) | |
2 | 1 | prmdiv 12176 | . 2 ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ ∧ ¬ 𝑃 ∥ 𝐴) → (𝑅 ∈ (1...(𝑃 − 1)) ∧ 𝑃 ∥ ((𝐴 · 𝑅) − 1))) |
3 | elfzelz 9968 | . . . . . . 7 ⊢ (𝑅 ∈ (1...(𝑃 − 1)) → 𝑅 ∈ ℤ) | |
4 | zmulcl 9252 | . . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑅 ∈ ℤ) → (𝐴 · 𝑅) ∈ ℤ) | |
5 | 3, 4 | sylan2 284 | . . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝑅 ∈ (1...(𝑃 − 1))) → (𝐴 · 𝑅) ∈ ℤ) |
6 | modprm1div 12188 | . . . . . 6 ⊢ ((𝑃 ∈ ℙ ∧ (𝐴 · 𝑅) ∈ ℤ) → (((𝐴 · 𝑅) mod 𝑃) = 1 ↔ 𝑃 ∥ ((𝐴 · 𝑅) − 1))) | |
7 | 5, 6 | sylan2 284 | . . . . 5 ⊢ ((𝑃 ∈ ℙ ∧ (𝐴 ∈ ℤ ∧ 𝑅 ∈ (1...(𝑃 − 1)))) → (((𝐴 · 𝑅) mod 𝑃) = 1 ↔ 𝑃 ∥ ((𝐴 · 𝑅) − 1))) |
8 | 7 | expr 373 | . . . 4 ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ) → (𝑅 ∈ (1...(𝑃 − 1)) → (((𝐴 · 𝑅) mod 𝑃) = 1 ↔ 𝑃 ∥ ((𝐴 · 𝑅) − 1)))) |
9 | 8 | 3adant3 1012 | . . 3 ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ ∧ ¬ 𝑃 ∥ 𝐴) → (𝑅 ∈ (1...(𝑃 − 1)) → (((𝐴 · 𝑅) mod 𝑃) = 1 ↔ 𝑃 ∥ ((𝐴 · 𝑅) − 1)))) |
10 | 9 | pm5.32d 447 | . 2 ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ ∧ ¬ 𝑃 ∥ 𝐴) → ((𝑅 ∈ (1...(𝑃 − 1)) ∧ ((𝐴 · 𝑅) mod 𝑃) = 1) ↔ (𝑅 ∈ (1...(𝑃 − 1)) ∧ 𝑃 ∥ ((𝐴 · 𝑅) − 1)))) |
11 | 2, 10 | mpbird 166 | 1 ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ ∧ ¬ 𝑃 ∥ 𝐴) → (𝑅 ∈ (1...(𝑃 − 1)) ∧ ((𝐴 · 𝑅) mod 𝑃) = 1)) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 973 = wceq 1348 ∈ wcel 2141 class class class wbr 3987 (class class class)co 5850 1c1 7762 · cmul 7766 − cmin 8077 2c2 8916 ℤcz 9199 ...cfz 9952 mod cmo 10265 ↑cexp 10462 ∥ cdvds 11736 ℙcprime 12048 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4102 ax-sep 4105 ax-nul 4113 ax-pow 4158 ax-pr 4192 ax-un 4416 ax-setind 4519 ax-iinf 4570 ax-cnex 7852 ax-resscn 7853 ax-1cn 7854 ax-1re 7855 ax-icn 7856 ax-addcl 7857 ax-addrcl 7858 ax-mulcl 7859 ax-mulrcl 7860 ax-addcom 7861 ax-mulcom 7862 ax-addass 7863 ax-mulass 7864 ax-distr 7865 ax-i2m1 7866 ax-0lt1 7867 ax-1rid 7868 ax-0id 7869 ax-rnegex 7870 ax-precex 7871 ax-cnre 7872 ax-pre-ltirr 7873 ax-pre-ltwlin 7874 ax-pre-lttrn 7875 ax-pre-apti 7876 ax-pre-ltadd 7877 ax-pre-mulgt0 7878 ax-pre-mulext 7879 ax-arch 7880 ax-caucvg 7881 |
This theorem depends on definitions: df-bi 116 df-stab 826 df-dc 830 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rmo 2456 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-nul 3415 df-if 3526 df-pw 3566 df-sn 3587 df-pr 3588 df-op 3590 df-uni 3795 df-int 3830 df-iun 3873 df-br 3988 df-opab 4049 df-mpt 4050 df-tr 4086 df-id 4276 df-po 4279 df-iso 4280 df-iord 4349 df-on 4351 df-ilim 4352 df-suc 4354 df-iom 4573 df-xp 4615 df-rel 4616 df-cnv 4617 df-co 4618 df-dm 4619 df-rn 4620 df-res 4621 df-ima 4622 df-iota 5158 df-fun 5198 df-fn 5199 df-f 5200 df-f1 5201 df-fo 5202 df-f1o 5203 df-fv 5204 df-isom 5205 df-riota 5806 df-ov 5853 df-oprab 5854 df-mpo 5855 df-1st 6116 df-2nd 6117 df-recs 6281 df-irdg 6346 df-frec 6367 df-1o 6392 df-2o 6393 df-oadd 6396 df-er 6509 df-en 6715 df-dom 6716 df-fin 6717 df-sup 6957 df-pnf 7943 df-mnf 7944 df-xr 7945 df-ltxr 7946 df-le 7947 df-sub 8079 df-neg 8080 df-reap 8481 df-ap 8488 df-div 8577 df-inn 8866 df-2 8924 df-3 8925 df-4 8926 df-n0 9123 df-z 9200 df-uz 9475 df-q 9566 df-rp 9598 df-fz 9953 df-fzo 10086 df-fl 10213 df-mod 10266 df-seqfrec 10389 df-exp 10463 df-ihash 10697 df-cj 10793 df-re 10794 df-im 10795 df-rsqrt 10949 df-abs 10950 df-clim 11229 df-proddc 11501 df-dvds 11737 df-gcd 11885 df-prm 12049 df-phi 12152 |
This theorem is referenced by: powm2modprm 12193 reumodprminv 12194 |
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