Theorem 2idlridld 21210

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 21206	. . 3 ⊢ (2Ideal‘𝑅) = ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂))
7	1, 6	eleqtrdi 2846	. 2 ⊢ (𝜑 → 𝐼 ∈ ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂)))
8	7	elin2d 4157	1 ⊢ (𝜑 → 𝐼 ∈ (LIdeal‘𝑂))

Syntax hints:   → wi 4   = wceq 1541   ∈ wcel 2113   ∩ cin 3900  ‘cfv 6492  opp_rcoppr 20272  LIdealclidl 21161  2Idealc2idl 21204

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-sep 5241  ax-nul 5251  ax-pr 5377

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3061  df-rab 3400  df-v 3442  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-nul 4286  df-if 4480  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-br 5099  df-opab 5161  df-mpt 5180  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-iota 6448  df-fun 6494  df-fv 6500  df-2idl 21205

This theorem is referenced by:  qsdrng  33578