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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 12925. (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 12925 | . 2 ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ ∧ ¬ 𝑃 ∥ 𝐴) → (𝑅 ∈ (1...(𝑃 − 1)) ∧ 𝑃 ∥ ((𝐴 · 𝑅) − 1))) |
| 3 | elfzelz 10355 | . . . . . . 7 ⊢ (𝑅 ∈ (1...(𝑃 − 1)) → 𝑅 ∈ ℤ) | |
| 4 | zmulcl 9627 | . . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑅 ∈ ℤ) → (𝐴 · 𝑅) ∈ ℤ) | |
| 5 | 3, 4 | sylan2 286 | . . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝑅 ∈ (1...(𝑃 − 1))) → (𝐴 · 𝑅) ∈ ℤ) |
| 6 | modprm1div 12938 | . . . . . 6 ⊢ ((𝑃 ∈ ℙ ∧ (𝐴 · 𝑅) ∈ ℤ) → (((𝐴 · 𝑅) mod 𝑃) = 1 ↔ 𝑃 ∥ ((𝐴 · 𝑅) − 1))) | |
| 7 | 5, 6 | sylan2 286 | . . . . 5 ⊢ ((𝑃 ∈ ℙ ∧ (𝐴 ∈ ℤ ∧ 𝑅 ∈ (1...(𝑃 − 1)))) → (((𝐴 · 𝑅) mod 𝑃) = 1 ↔ 𝑃 ∥ ((𝐴 · 𝑅) − 1))) |
| 8 | 7 | expr 375 | . . . 4 ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ) → (𝑅 ∈ (1...(𝑃 − 1)) → (((𝐴 · 𝑅) mod 𝑃) = 1 ↔ 𝑃 ∥ ((𝐴 · 𝑅) − 1)))) |
| 9 | 8 | 3adant3 1044 | . . 3 ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ ∧ ¬ 𝑃 ∥ 𝐴) → (𝑅 ∈ (1...(𝑃 − 1)) → (((𝐴 · 𝑅) mod 𝑃) = 1 ↔ 𝑃 ∥ ((𝐴 · 𝑅) − 1)))) |
| 10 | 9 | pm5.32d 450 | . 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 167 | 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 104 ↔ wb 105 ∧ w3a 1005 = wceq 1398 ∈ wcel 2203 class class class wbr 4108 (class class class)co 6049 1c1 8124 · cmul 8128 − cmin 8440 2c2 9284 ℤcz 9573 ...cfz 10338 mod cmo 10680 ↑cexp 10896 ∥ cdvds 12466 ℙcprime 12797 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-coll 4224 ax-sep 4227 ax-nul 4235 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-iinf 4709 ax-cnex 8214 ax-resscn 8215 ax-1cn 8216 ax-1re 8217 ax-icn 8218 ax-addcl 8219 ax-addrcl 8220 ax-mulcl 8221 ax-mulrcl 8222 ax-addcom 8223 ax-mulcom 8224 ax-addass 8225 ax-mulass 8226 ax-distr 8227 ax-i2m1 8228 ax-0lt1 8229 ax-1rid 8230 ax-0id 8231 ax-rnegex 8232 ax-precex 8233 ax-cnre 8234 ax-pre-ltirr 8235 ax-pre-ltwlin 8236 ax-pre-lttrn 8237 ax-pre-apti 8238 ax-pre-ltadd 8239 ax-pre-mulgt0 8240 ax-pre-mulext 8241 ax-arch 8242 ax-caucvg 8243 |
| This theorem depends on definitions: df-bi 117 df-stab 839 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-reu 2527 df-rmo 2528 df-rab 2529 df-v 2814 df-sbc 3042 df-csb 3138 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-nul 3508 df-if 3620 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-int 3949 df-iun 3992 df-br 4109 df-opab 4171 df-mpt 4172 df-tr 4208 df-id 4413 df-po 4416 df-iso 4417 df-iord 4486 df-on 4488 df-ilim 4489 df-suc 4491 df-iom 4712 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-ima 4761 df-iota 5311 df-fun 5353 df-fn 5354 df-f 5355 df-f1 5356 df-fo 5357 df-f1o 5358 df-fv 5359 df-isom 5360 df-riota 6002 df-ov 6052 df-oprab 6053 df-mpo 6054 df-1st 6333 df-2nd 6334 df-recs 6535 df-irdg 6600 df-frec 6621 df-1o 6646 df-2o 6647 df-oadd 6650 df-er 6766 df-en 6975 df-dom 6976 df-fin 6977 df-sup 7274 df-pnf 8306 df-mnf 8307 df-xr 8308 df-ltxr 8309 df-le 8310 df-sub 8442 df-neg 8443 df-reap 8845 df-ap 8852 df-div 8943 df-inn 9234 df-2 9292 df-3 9293 df-4 9294 df-n0 9493 df-z 9574 df-uz 9850 df-q 9948 df-rp 9983 df-fz 10339 df-fzo 10473 df-fl 10626 df-mod 10681 df-seqfrec 10806 df-exp 10897 df-ihash 11134 df-cj 11520 df-re 11521 df-im 11522 df-rsqrt 11676 df-abs 11677 df-clim 11957 df-proddc 12230 df-dvds 12467 df-gcd 12643 df-prm 12798 df-phi 12901 |
| This theorem is referenced by: powm2modprm 12943 reumodprminv 12944 |
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