Theorem rprmnunit 33549

Description: A ring prime is not a unit. (Contributed by Thierry Arnoux, 18-May-2025.)

Hypotheses

Ref	Expression
rprmdvds.2	⊢ 𝑃 = (RPrime‘𝑅)
rprmdvds.3	⊢ 𝑈 = (Unit‘𝑅)
rprmdvds.5	⊢ (𝜑 → 𝑅 ∈ 𝑉)
rprmdvds.6	⊢ (𝜑 → 𝑄 ∈ 𝑃)

Assertion

Ref	Expression
rprmnunit	⊢ (𝜑 → ¬ 𝑄 ∈ 𝑈)

Proof of Theorem rprmnunit

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqidd 2738	. 2 ⊢ (𝜑 → (𝑈 ∪ {(0g‘𝑅)}) = (𝑈 ∪ {(0g‘𝑅)}))
2		rprmdvds.5	. . . 4 ⊢ (𝜑 → 𝑅 ∈ 𝑉)
3		rprmdvds.6	. . . . 5 ⊢ (𝜑 → 𝑄 ∈ 𝑃)
4		rprmdvds.2	. . . . 5 ⊢ 𝑃 = (RPrime‘𝑅)
5	3, 4	eleqtrdi 2851	. . . 4 ⊢ (𝜑 → 𝑄 ∈ (RPrime‘𝑅))
6		eqid 2737	. . . . . 6 ⊢ (Base‘𝑅) = (Base‘𝑅)
7		rprmdvds.3	. . . . . 6 ⊢ 𝑈 = (Unit‘𝑅)
8		eqid 2737	. . . . . 6 ⊢ (0g‘𝑅) = (0g‘𝑅)
9		eqid 2737	. . . . . 6 ⊢ (∥r‘𝑅) = (∥r‘𝑅)
10		eqid 2737	. . . . . 6 ⊢ (.r‘𝑅) = (.r‘𝑅)
11	6, 7, 8, 9, 10	isrprm 33545	. . . . 5 ⊢ (𝑅 ∈ 𝑉 → (𝑄 ∈ (RPrime‘𝑅) ↔ (𝑄 ∈ ((Base‘𝑅) ∖ (𝑈 ∪ {(0g‘𝑅)})) ∧ ∀𝑥 ∈ (Base‘𝑅)∀𝑦 ∈ (Base‘𝑅)(𝑄(∥r‘𝑅)(𝑥(.r‘𝑅)𝑦) → (𝑄(∥r‘𝑅)𝑥 ∨ 𝑄(∥r‘𝑅)𝑦)))))
12	11	simprbda 498	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝑄 ∈ (RPrime‘𝑅)) → 𝑄 ∈ ((Base‘𝑅) ∖ (𝑈 ∪ {(0g‘𝑅)})))
13	2, 5, 12	syl2anc 584	. . 3 ⊢ (𝜑 → 𝑄 ∈ ((Base‘𝑅) ∖ (𝑈 ∪ {(0g‘𝑅)})))
14	13	eldifbd 3964	. 2 ⊢ (𝜑 → ¬ 𝑄 ∈ (𝑈 ∪ {(0g‘𝑅)}))
15		nelun 32532	. . 3 ⊢ ((𝑈 ∪ {(0g‘𝑅)}) = (𝑈 ∪ {(0g‘𝑅)}) → (¬ 𝑄 ∈ (𝑈 ∪ {(0g‘𝑅)}) ↔ (¬ 𝑄 ∈ 𝑈 ∧ ¬ 𝑄 ∈ {(0g‘𝑅)})))
16	15	simprbda 498	. 2 ⊢ (((𝑈 ∪ {(0g‘𝑅)}) = (𝑈 ∪ {(0g‘𝑅)}) ∧ ¬ 𝑄 ∈ (𝑈 ∪ {(0g‘𝑅)})) → ¬ 𝑄 ∈ 𝑈)
17	1, 14, 16	syl2anc 584	1 ⊢ (𝜑 → ¬ 𝑄 ∈ 𝑈)

Syntax hints:  ¬ wn 3   → wi 4   ∨ wo 848   = wceq 1540   ∈ wcel 2108  ∀wral 3061   ∖ cdif 3948   ∪ cun 3949  {csn 4626   class class class wbr 5143  ‘cfv 6561  (class class class)co 7431  Basecbs 17247  ._rcmulr 17298  0_gc0g 17484  ∥_rcdsr 20354  Unitcui 20355  RPrimecrpm 20432

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2708  ax-sep 5296  ax-nul 5306  ax-pr 5432

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2892  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3437  df-v 3482  df-sbc 3789  df-csb 3900  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-nul 4334  df-if 4526  df-pw 4602  df-sn 4627  df-pr 4629  df-op 4633  df-uni 4908  df-br 5144  df-opab 5206  df-mpt 5226  df-id 5578  df-xp 5691  df-rel 5692  df-cnv 5693  df-co 5694  df-dm 5695  df-iota 6514  df-fun 6563  df-fv 6569  df-ov 7434  df-rprm 20433

This theorem is referenced by:  rsprprmprmidl  33550  rprmndvdsr1  33552  rprmirred  33559  1arithidom  33565