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Theorem iscrngo 34100
Description: The predicate "is a commutative ring". (Contributed by Jeff Madsen, 8-Jun-2010.)
Assertion
Ref Expression
iscrngo (𝑅 ∈ CRingOps ↔ (𝑅 ∈ RingOps ∧ 𝑅 ∈ Com2))

Proof of Theorem iscrngo
StepHypRef Expression
1 df-crngo 34098 . 2 CRingOps = (RingOps ∩ Com2)
21elin2 3994 1 (𝑅 ∈ CRingOps ↔ (𝑅 ∈ RingOps ∧ 𝑅 ∈ Com2))
Colors of variables: wff setvar class
Syntax hints:  wb 197  wa 384  wcel 2155  RingOpscrngo 33998  Com2ccm2 34093  CRingOpsccring 34097
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1877  ax-4 1894  ax-5 2001  ax-6 2067  ax-7 2103  ax-9 2164  ax-10 2184  ax-11 2200  ax-12 2213  ax-13 2419  ax-ext 2781
This theorem depends on definitions:  df-bi 198  df-an 385  df-or 866  df-tru 1641  df-ex 1860  df-nf 1864  df-sb 2060  df-clab 2789  df-cleq 2795  df-clel 2798  df-nfc 2933  df-v 3389  df-in 3770  df-crngo 34098
This theorem is referenced by:  iscrngo2  34101  iscringd  34102  crngorngo  34104  fldcrng  34108  isfld2  34109  isdmn2  34159
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