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Theorem 2idlridld 21431
Description: A two-sided ideal is a right ideal. (Contributed by Thierry Arnoux, 9-Mar-2025.)
Hypotheses
Ref Expression
2idllidld.1 (𝜑𝐼 ∈ (2Ideal‘𝑅))
2idlridld.o 𝑂 = (oppr𝑅)
Assertion
Ref Expression
2idlridld (𝜑𝐼 ∈ (LIdeal‘𝑂))

Proof of Theorem 2idlridld
StepHypRef Expression
1 2idllidld.1 . . 3 (𝜑𝐼 ∈ (2Ideal‘𝑅))
2 eqid 2766 . . . 4 (LIdeal‘𝑅) = (LIdeal‘𝑅)
3 2idlridld.o . . . 4 𝑂 = (oppr𝑅)
4 eqid 2766 . . . 4 (LIdeal‘𝑂) = (LIdeal‘𝑂)
5 eqid 2766 . . . 4 (2Ideal‘𝑅) = (2Ideal‘𝑅)
62, 3, 4, 52idlval 21427 . . 3 (2Ideal‘𝑅) = ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂))
71, 6eleqtrdi 2876 . 2 (𝜑𝐼 ∈ ((LIdeal‘𝑅) ∩ (LIdeal‘𝑂)))
87elin2d 4161 1 (𝜑𝐼 ∈ (LIdeal‘𝑂))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4   = wceq 1570  wcel 2146  cin 3907  cfv 6543  opprcoppr 20451  LIdealclidl 21367  2Idealc2idl 21425
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2738  ax-sep 5262  ax-nul 5274  ax-pr 5409
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2570  df-eu 2600  df-clab 2745  df-cleq 2758  df-clel 2841  df-nfc 2915  df-ne 2962  df-ral 3083  df-rex 3093  df-rab 3420  df-v 3460  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-nul 4290  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-br 5115  df-opab 5179  df-mpt 5198  df-id 5561  df-xp 5672  df-rel 5673  df-cnv 5674  df-co 5675  df-dm 5676  df-iota 6499  df-fun 6545  df-fv 6551  df-2idl 21426
This theorem is used by:  qsdrng  33810
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