Theorem 2idlridld 21221

Description: A two-sided ideal is a right ideal. (Contributed by Thierry Arnoux, 9-Mar-2025.)

Hypotheses

Ref	Expression
2idllidld.1	⊢ (𝜑 → 𝐼 ∈ (2Ideal‘𝑅))
2idlridld.o	⊢ 𝑂 = (oppr‘𝑅)

Assertion

Ref	Expression
2idlridld	⊢ (𝜑 → 𝐼 ∈ (LIdeal‘𝑂))

Proof of Theorem 2idlridld

Step	Hyp	Ref	Expression
1		2idllidld.1	. . 3 ⊢ (𝜑 → 𝐼 ∈ (2Ideal‘𝑅))
2		eqid 2736	. . . 4 ⊢ (LIdeal‘𝑅) = (LIdeal‘𝑅)
3		2idlridld.o	. . . 4 ⊢ 𝑂 = (oppr‘𝑅)
4		eqid 2736	. . . 4 ⊢ (LIdeal‘𝑂) = (LIdeal‘𝑂)
5		eqid 2736	. . . 4 ⊢ (2Ideal‘𝑅) = (2Ideal‘𝑅)
6	2, 3, 4, 5	2idlval 21217	. . 3 ⊢ (2Ideal‘𝑅) = ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂))
7	1, 6	eleqtrdi 2845	. 2 ⊢ (𝜑 → 𝐼 ∈ ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂)))
8	7	elin2d 4185	1 ⊢ (𝜑 → 𝐼 ∈ (LIdeal‘𝑂))

Syntax hints:   → wi 4   = wceq 1540   ∈ wcel 2109   ∩ cin 3930  ‘cfv 6536  opp_rcoppr 20301  LIdealclidl 21172  2Idealc2idl 21215

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 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2708  ax-sep 5271  ax-nul 5281  ax-pr 5407

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2810  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3062  df-rab 3421  df-v 3466  df-dif 3934  df-un 3936  df-in 3938  df-ss 3948  df-nul 4314  df-if 4506  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4889  df-br 5125  df-opab 5187  df-mpt 5207  df-id 5553  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-iota 6489  df-fun 6538  df-fv 6544  df-2idl 21216

This theorem is referenced by:  qsdrng  33517