Theorem 2idlridld 21222

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 2737	. . . 4 ⊢ (LIdeal‘𝑅) = (LIdeal‘𝑅)
3		2idlridld.o	. . . 4 ⊢ 𝑂 = (oppr‘𝑅)
4		eqid 2737	. . . 4 ⊢ (LIdeal‘𝑂) = (LIdeal‘𝑂)
5		eqid 2737	. . . 4 ⊢ (2Ideal‘𝑅) = (2Ideal‘𝑅)
6	2, 3, 4, 5	2idlval 21218	. . 3 ⊢ (2Ideal‘𝑅) = ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂))
7	1, 6	eleqtrdi 2847	. 2 ⊢ (𝜑 → 𝐼 ∈ ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂)))
8	7	elin2d 4159	1 ⊢ (𝜑 → 𝐼 ∈ (LIdeal‘𝑂))

Syntax hints:   → wi 4   = wceq 1542   ∈ wcel 2114   ∩ cin 3902  ‘cfv 6500  opp_rcoppr 20284  LIdealclidl 21173  2Idealc2idl 21216

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-sep 5243  ax-nul 5253  ax-pr 5379

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-rab 3402  df-v 3444  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-opab 5163  df-mpt 5182  df-id 5527  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-iota 6456  df-fun 6502  df-fv 6508  df-2idl 21217

This theorem is referenced by:  qsdrng  33589