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Theorem cmnmnd 13949
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 2231 . . 3 (Base‘𝐺) = (Base‘𝐺)
2 eqid 2231 . . 3 (+g𝐺) = (+g𝐺)
31, 2iscmn 13941 . 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 1398  wcel 2202  wral 2511  cfv 5333  (class class class)co 6028  Basecbs 13143  +gcplusg 13221  Mndcmnd 13560  CMndccmn 13932
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rex 2517  df-rab 2520  df-v 2805  df-un 3205  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-br 4094  df-iota 5293  df-fv 5341  df-ov 6031  df-cmn 13934
This theorem is referenced by:  cmn32  13952  cmn4  13953  cmn12  13954  cmnmndd  13956  rinvmod  13957  ghmcmn  13975  srgmnd  14042
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