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Theorem subcmnd 14042
Description: A submonoid of a commutative monoid is also commutative. (Contributed by Mario Carneiro, 10-Jan-2015.)
Hypotheses
Ref Expression
subcmnd.h (𝜑𝐻 = (𝐺s 𝑆))
subcmnd.g (𝜑𝐺 ∈ CMnd)
subcmnd.m (𝜑𝐻 ∈ Mnd)
subcmnd.s (𝜑𝑆𝑉)
Assertion
Ref Expression
subcmnd (𝜑𝐻 ∈ CMnd)

Proof of Theorem subcmnd
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqidd 2233 . 2 (𝜑 → (Base‘𝐻) = (Base‘𝐻))
2 subcmnd.h . . 3 (𝜑𝐻 = (𝐺s 𝑆))
3 eqidd 2233 . . 3 (𝜑 → (+g𝐺) = (+g𝐺))
4 subcmnd.s . . 3 (𝜑𝑆𝑉)
5 subcmnd.g . . 3 (𝜑𝐺 ∈ CMnd)
62, 3, 4, 5ressplusgd 13334 . 2 (𝜑 → (+g𝐺) = (+g𝐻))
7 subcmnd.m . 2 (𝜑𝐻 ∈ Mnd)
853ad2ant1 1045 . . 3 ((𝜑𝑥 ∈ (Base‘𝐻) ∧ 𝑦 ∈ (Base‘𝐻)) → 𝐺 ∈ CMnd)
9 eqidd 2233 . . . . . 6 (𝜑 → (Base‘𝐺) = (Base‘𝐺))
102, 9, 5, 4ressbasssd 13274 . . . . 5 (𝜑 → (Base‘𝐻) ⊆ (Base‘𝐺))
1110sselda 3237 . . . 4 ((𝜑𝑥 ∈ (Base‘𝐻)) → 𝑥 ∈ (Base‘𝐺))
12113adant3 1044 . . 3 ((𝜑𝑥 ∈ (Base‘𝐻) ∧ 𝑦 ∈ (Base‘𝐻)) → 𝑥 ∈ (Base‘𝐺))
1310sselda 3237 . . . 4 ((𝜑𝑦 ∈ (Base‘𝐻)) → 𝑦 ∈ (Base‘𝐺))
14133adant2 1043 . . 3 ((𝜑𝑥 ∈ (Base‘𝐻) ∧ 𝑦 ∈ (Base‘𝐻)) → 𝑦 ∈ (Base‘𝐺))
15 eqid 2232 . . . 4 (Base‘𝐺) = (Base‘𝐺)
16 eqid 2232 . . . 4 (+g𝐺) = (+g𝐺)
1715, 16cmncom 14011 . . 3 ((𝐺 ∈ CMnd ∧ 𝑥 ∈ (Base‘𝐺) ∧ 𝑦 ∈ (Base‘𝐺)) → (𝑥(+g𝐺)𝑦) = (𝑦(+g𝐺)𝑥))
188, 12, 14, 17syl3anc 1274 . 2 ((𝜑𝑥 ∈ (Base‘𝐻) ∧ 𝑦 ∈ (Base‘𝐻)) → (𝑥(+g𝐺)𝑦) = (𝑦(+g𝐺)𝑥))
191, 6, 7, 18iscmnd 14007 1 (𝜑𝐻 ∈ CMnd)
Colors of variables: wff set class
Syntax hints:  wi 4  w3a 1005   = wceq 1398  wcel 2203  cfv 5351  (class class class)co 6049  Basecbs 13204  s cress 13205  +gcplusg 13282  Mndcmnd 13621  CMndccmn 13993
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-in1 619  ax-in2 620  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-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-cnex 8217  ax-resscn 8218  ax-1cn 8219  ax-1re 8220  ax-icn 8221  ax-addcl 8222  ax-addrcl 8223  ax-mulcl 8224  ax-addcom 8226  ax-addass 8228  ax-i2m1 8231  ax-0lt1 8232  ax-0id 8234  ax-rnegex 8235  ax-pre-ltirr 8238  ax-pre-ltadd 8242
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-rab 2529  df-v 2814  df-sbc 3042  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-br 4109  df-opab 4171  df-mpt 4172  df-id 4413  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-iota 5311  df-fun 5353  df-fv 5359  df-ov 6052  df-oprab 6053  df-mpo 6054  df-pnf 8309  df-mnf 8310  df-ltxr 8312  df-inn 9237  df-2 9295  df-ndx 13207  df-slot 13208  df-base 13210  df-sets 13211  df-iress 13212  df-plusg 13295  df-cmn 13995
This theorem is referenced by:  unitabl  14254  subrgcrng  14362
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