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Theorem iscrngo 36198
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 36196 . 2 CRingOps = (RingOps ∩ Com2)
21elin2 4137 1 (𝑅 ∈ CRingOps ↔ (𝑅 ∈ RingOps ∧ 𝑅 ∈ Com2))
Colors of variables: wff setvar class
Syntax hints:  wb 205  wa 397  wcel 2104  RingOpscrngo 36096  Com2ccm2 36191  CRingOpsccring 36195
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1911  ax-6 1969  ax-7 2009  ax-8 2106  ax-9 2114  ax-ext 2707
This theorem depends on definitions:  df-bi 206  df-an 398  df-tru 1542  df-ex 1780  df-sb 2066  df-clab 2714  df-cleq 2728  df-clel 2814  df-v 3439  df-in 3899  df-crngo 36196
This theorem is referenced by:  iscrngo2  36199  iscringd  36200  crngorngo  36202  fldcrng  36206  isfld2  36207  isdmn2  36257
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