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Theorem cmnmnd 12900
Description: A commutative monoid is a monoid. (Contributed by Mario Carneiro, 6-Jan-2015.)
Assertion
Ref Expression
cmnmnd (𝐺 ∈ CMnd → 𝐺 ∈ Mnd)

Proof of Theorem cmnmnd
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2175 . . 3 (Base‘𝐺) = (Base‘𝐺)
2 eqid 2175 . . 3 (+g𝐺) = (+g𝐺)
31, 2iscmn 12892 . 2 (𝐺 ∈ CMnd ↔ (𝐺 ∈ Mnd ∧ ∀𝑥 ∈ (Base‘𝐺)∀𝑦 ∈ (Base‘𝐺)(𝑥(+g𝐺)𝑦) = (𝑦(+g𝐺)𝑥)))
43simplbi 274 1 (𝐺 ∈ CMnd → 𝐺 ∈ Mnd)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1353  wcel 2146  wral 2453  cfv 5208  (class class class)co 5865  Basecbs 12428  +gcplusg 12492  Mndcmnd 12682  CMndccmn 12884
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-ral 2458  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-ov 5868  df-cmn 12886
This theorem is referenced by:  cmn32  12903  cmn4  12904  cmn12  12905  cmnmndd  12907  rinvmod  12908  srgmnd  12943
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