Theorem ufdprmidl 33831

Description: In a unique factorization domain 𝑅, a nonzero prime ideal 𝐽 contains a prime element 𝑝. (Contributed by Thierry Arnoux, 3-Jun-2025.)

Hypotheses

Ref	Expression
isufd.i	⊢ 𝐼 = (PrmIdeal‘𝑅)
isufd.3	⊢ 𝑃 = (RPrime‘𝑅)
isufd.0	⊢ 0 = (0g‘𝑅)
ufdprmidl.2	⊢ (𝜑 → 𝑅 ∈ UFD)
ufdprmidl.3	⊢ (𝜑 → 𝐽 ∈ 𝐼)
ufdprmidl.4	⊢ (𝜑 → 𝐽 ≠ { 0 })

Assertion

Ref	Expression
ufdprmidl	⊢ (𝜑 → ∃𝑝 ∈ 𝑃 𝑝 ∈ 𝐽)

Distinct variable groups:   𝐽,𝑝   𝑃,𝑝

Allowed substitution hints:   𝜑(𝑝)   𝑅(𝑝)   𝐼(𝑝)   0 (𝑝)

Proof of Theorem ufdprmidl

Dummy variable 𝑗 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ineq1 4166	. . . . 5 ⊢ (𝑗 = 𝐽 → (𝑗 ∩ 𝑃) = (𝐽 ∩ 𝑃))
2	1	neeq1d 3017	. . . 4 ⊢ (𝑗 = 𝐽 → ((𝑗 ∩ 𝑃) ≠ ∅ ↔ (𝐽 ∩ 𝑃) ≠ ∅))
3	2	adantl 486	. . 3 ⊢ ((𝜑 ∧ 𝑗 = 𝐽) → ((𝑗 ∩ 𝑃) ≠ ∅ ↔ (𝐽 ∩ 𝑃) ≠ ∅))
4		incom 4162	. . . . 5 ⊢ (𝑃 ∩ 𝐽) = (𝐽 ∩ 𝑃)
5	4	neeq1i 3022	. . . 4 ⊢ ((𝑃 ∩ 𝐽) ≠ ∅ ↔ (𝐽 ∩ 𝑃) ≠ ∅)
6		inn0 4327	. . . 4 ⊢ ((𝑃 ∩ 𝐽) ≠ ∅ ↔ ∃𝑝 ∈ 𝑃 𝑝 ∈ 𝐽)
7	5, 6	bitr3i 280	. . 3 ⊢ ((𝐽 ∩ 𝑃) ≠ ∅ ↔ ∃𝑝 ∈ 𝑃 𝑝 ∈ 𝐽)
8	3, 7	bitrdi 290	. 2 ⊢ ((𝜑 ∧ 𝑗 = 𝐽) → ((𝑗 ∩ 𝑃) ≠ ∅ ↔ ∃𝑝 ∈ 𝑃 𝑝 ∈ 𝐽))
9		ufdprmidl.3	. . 3 ⊢ (𝜑 → 𝐽 ∈ 𝐼)
10		ufdprmidl.4	. . 3 ⊢ (𝜑 → 𝐽 ≠ { 0 })
11	9, 10	eldifsnd 4755	. 2 ⊢ (𝜑 → 𝐽 ∈ (𝐼 ∖ {{ 0 }}))
12		ufdprmidl.2	. . 3 ⊢ (𝜑 → 𝑅 ∈ UFD)
13		isufd.i	. . . . 5 ⊢ 𝐼 = (PrmIdeal‘𝑅)
14		isufd.3	. . . . 5 ⊢ 𝑃 = (RPrime‘𝑅)
15		isufd.0	. . . . 5 ⊢ 0 = (0g‘𝑅)
16	13, 14, 15	isufd 33830	. . . 4 ⊢ (𝑅 ∈ UFD ↔ (𝑅 ∈ IDomn ∧ ∀𝑗 ∈ (𝐼 ∖ {{ 0 }})(𝑗 ∩ 𝑃) ≠ ∅))
17	16	simprbi 502	. . 3 ⊢ (𝑅 ∈ UFD → ∀𝑗 ∈ (𝐼 ∖ {{ 0 }})(𝑗 ∩ 𝑃) ≠ ∅)
18	12, 17	syl 18	. 2 ⊢ (𝜑 → ∀𝑗 ∈ (𝐼 ∖ {{ 0 }})(𝑗 ∩ 𝑃) ≠ ∅)
19	8, 11, 18	rspcdv2 3576	1 ⊢ (𝜑 → ∃𝑝 ∈ 𝑃 𝑝 ∈ 𝐽)

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 400   = wceq 1570   ∈ wcel 2143   ≠ wne 2958  ∀wral 3079  ∃wrex 3089   ∖ cdif 3902   ∩ cin 3904  ∅c0 4286  {csn 4589  ‘cfv 6536  0_gc0g 17487  RPrimecrpm 20510  IDomncidom 20792  PrmIdealcprmidl 21460  UFDcufd 33828

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-11 2192  ax-12 2213  ax-ext 2735

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4488  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4873  df-br 5110  df-iota 6492  df-fv 6544  df-ufd 33829

This theorem is referenced by:  1arithufdlem1  33834