Theorem 2idlridld 21375

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 2763	. . . 4 ⊢ (LIdeal‘𝑅) = (LIdeal‘𝑅)
3		2idlridld.o	. . . 4 ⊢ 𝑂 = (oppr‘𝑅)
4		eqid 2763	. . . 4 ⊢ (LIdeal‘𝑂) = (LIdeal‘𝑂)
5		eqid 2763	. . . 4 ⊢ (2Ideal‘𝑅) = (2Ideal‘𝑅)
6	2, 3, 4, 5	2idlval 21371	. . 3 ⊢ (2Ideal‘𝑅) = ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂))
7	1, 6	eleqtrdi 2873	. 2 ⊢ (𝜑 → 𝐼 ∈ ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂)))
8	7	elin2d 4159	1 ⊢ (𝜑 → 𝐼 ∈ (LIdeal‘𝑂))

Syntax hints:   → wi 4   = wceq 1570   ∈ wcel 2143   ∩ cin 3905  ‘cfv 6538  opp_rcoppr 20419  LIdealclidl 21311  2Idealc2idl 21369

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-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5258  ax-nul 5270  ax-pr 5406

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-mo 2567  df-eu 2597  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 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-iota 6494  df-fun 6540  df-fv 6546  df-2idl 21370

This theorem is referenced by:  qsdrng  33757