Theorem crngring 12984

Description: A commutative ring is a ring. (Contributed by Mario Carneiro, 7-Jan-2015.)

Assertion

Ref	Expression
crngring	⊢ (𝑅 ∈ CRing → 𝑅 ∈ Ring)

Proof of Theorem crngring

Step	Hyp	Ref	Expression
1		eqid 2175	. . 3 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
2	1	iscrng 12979	. 2 ⊢ (𝑅 ∈ CRing ↔ (𝑅 ∈ Ring ∧ (mulGrp‘𝑅) ∈ CMnd))
3	2	simplbi 274	1 ⊢ (𝑅 ∈ CRing → 𝑅 ∈ Ring)

Syntax hints:   → wi 4   ∈ wcel 2146  ‘cfv 5208  CMndccmn 12884  mulGrpcmgp 12925  Ringcrg 12972  CRingccrg 12973

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 709  ax-5 1445  ax-7 1446  ax-gen 1447  ax-ie1 1491  ax-ie2 1492  ax-8 1502  ax-10 1503  ax-11 1504  ax-i12 1505  ax-bndl 1507  ax-4 1508  ax-17 1524  ax-i9 1528  ax-ial 1532  ax-i5r 1533  ax-ext 2157

This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1459  df-sb 1761  df-clab 2162  df-cleq 2168  df-clel 2171  df-nfc 2306  df-rex 2459  df-rab 2462  df-v 2737  df-un 3131  df-sn 3595  df-pr 3596  df-op 3598  df-uni 3806  df-br 3999  df-iota 5170  df-fv 5216  df-cring 12975

This theorem is referenced by:  crngringd  12985