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| Mirrors > Home > ILE Home > Th. List > modm1div | GIF version | ||
| Description: An integer greater than one divides another integer minus one iff the second integer modulo the first integer is one. (Contributed by AV, 30-May-2023.) |
| Ref | Expression |
|---|---|
| modm1div | ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐴 ∈ ℤ) → ((𝐴 mod 𝑁) = 1 ↔ 𝑁 ∥ (𝐴 − 1))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluzelz 9664 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘2) → 𝑁 ∈ ℤ) | |
| 2 | zq 9754 | . . . . 5 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℚ) | |
| 3 | 1, 2 | syl 14 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘2) → 𝑁 ∈ ℚ) |
| 4 | eluz2gt1 9730 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘2) → 1 < 𝑁) | |
| 5 | 4 | adantr 276 | . . . 4 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐴 ∈ ℤ) → 1 < 𝑁) |
| 6 | q1mod 10508 | . . . . 5 ⊢ ((𝑁 ∈ ℚ ∧ 1 < 𝑁) → (1 mod 𝑁) = 1) | |
| 7 | 6 | eqcomd 2212 | . . . 4 ⊢ ((𝑁 ∈ ℚ ∧ 1 < 𝑁) → 1 = (1 mod 𝑁)) |
| 8 | 3, 5, 7 | syl2an2r 595 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐴 ∈ ℤ) → 1 = (1 mod 𝑁)) |
| 9 | 8 | eqeq2d 2218 | . 2 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐴 ∈ ℤ) → ((𝐴 mod 𝑁) = 1 ↔ (𝐴 mod 𝑁) = (1 mod 𝑁))) |
| 10 | eluz2nn 9694 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘2) → 𝑁 ∈ ℕ) | |
| 11 | 10 | adantr 276 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐴 ∈ ℤ) → 𝑁 ∈ ℕ) |
| 12 | simpr 110 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐴 ∈ ℤ) → 𝐴 ∈ ℤ) | |
| 13 | 1zzd 9406 | . . 3 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐴 ∈ ℤ) → 1 ∈ ℤ) | |
| 14 | moddvds 12154 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ ℤ ∧ 1 ∈ ℤ) → ((𝐴 mod 𝑁) = (1 mod 𝑁) ↔ 𝑁 ∥ (𝐴 − 1))) | |
| 15 | 11, 12, 13, 14 | syl3anc 1250 | . 2 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐴 ∈ ℤ) → ((𝐴 mod 𝑁) = (1 mod 𝑁) ↔ 𝑁 ∥ (𝐴 − 1))) |
| 16 | 9, 15 | bitrd 188 | 1 ⊢ ((𝑁 ∈ (ℤ≥‘2) ∧ 𝐴 ∈ ℤ) → ((𝐴 mod 𝑁) = 1 ↔ 𝑁 ∥ (𝐴 − 1))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1373 ∈ wcel 2177 class class class wbr 4047 ‘cfv 5276 (class class class)co 5951 1c1 7933 < clt 8114 − cmin 8250 ℕcn 9043 2c2 9094 ℤcz 9379 ℤ≥cuz 9655 ℚcq 9747 mod cmo 10474 ∥ cdvds 12142 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-sep 4166 ax-pow 4222 ax-pr 4257 ax-un 4484 ax-setind 4589 ax-cnex 8023 ax-resscn 8024 ax-1cn 8025 ax-1re 8026 ax-icn 8027 ax-addcl 8028 ax-addrcl 8029 ax-mulcl 8030 ax-mulrcl 8031 ax-addcom 8032 ax-mulcom 8033 ax-addass 8034 ax-mulass 8035 ax-distr 8036 ax-i2m1 8037 ax-0lt1 8038 ax-1rid 8039 ax-0id 8040 ax-rnegex 8041 ax-precex 8042 ax-cnre 8043 ax-pre-ltirr 8044 ax-pre-ltwlin 8045 ax-pre-lttrn 8046 ax-pre-apti 8047 ax-pre-ltadd 8048 ax-pre-mulgt0 8049 ax-pre-mulext 8050 ax-arch 8051 |
| This theorem depends on definitions: df-bi 117 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-nel 2473 df-ral 2490 df-rex 2491 df-reu 2492 df-rmo 2493 df-rab 2494 df-v 2775 df-sbc 3000 df-csb 3095 df-dif 3169 df-un 3171 df-in 3173 df-ss 3180 df-pw 3619 df-sn 3640 df-pr 3641 df-op 3643 df-uni 3853 df-int 3888 df-iun 3931 df-br 4048 df-opab 4110 df-mpt 4111 df-id 4344 df-po 4347 df-iso 4348 df-xp 4685 df-rel 4686 df-cnv 4687 df-co 4688 df-dm 4689 df-rn 4690 df-res 4691 df-ima 4692 df-iota 5237 df-fun 5278 df-fn 5279 df-f 5280 df-fv 5284 df-riota 5906 df-ov 5954 df-oprab 5955 df-mpo 5956 df-1st 6233 df-2nd 6234 df-pnf 8116 df-mnf 8117 df-xr 8118 df-ltxr 8119 df-le 8120 df-sub 8252 df-neg 8253 df-reap 8655 df-ap 8662 df-div 8753 df-inn 9044 df-2 9102 df-n0 9303 df-z 9380 df-uz 9656 df-q 9748 df-rp 9783 df-fl 10420 df-mod 10475 df-dvds 12143 |
| This theorem is referenced by: modprm1div 12614 |
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