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Theorem submid 13679
Description: Every monoid is trivially a submonoid of itself. (Contributed by Stefan O'Rear, 15-Aug-2015.)
Hypothesis
Ref Expression
submss.b 𝐵 = (Base‘𝑀)
Assertion
Ref Expression
submid (𝑀 ∈ Mnd → 𝐵 ∈ (SubMnd‘𝑀))

Proof of Theorem submid
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ssidd 3258 . 2 (𝑀 ∈ Mnd → 𝐵𝐵)
2 submss.b . . 3 𝐵 = (Base‘𝑀)
3 eqid 2232 . . 3 (0g𝑀) = (0g𝑀)
42, 3mndidcl 13632 . 2 (𝑀 ∈ Mnd → (0g𝑀) ∈ 𝐵)
5 eqid 2232 . . . . 5 (+g𝑀) = (+g𝑀)
62, 5mndcl 13625 . . . 4 ((𝑀 ∈ Mnd ∧ 𝑥𝐵𝑦𝐵) → (𝑥(+g𝑀)𝑦) ∈ 𝐵)
763expb 1231 . . 3 ((𝑀 ∈ Mnd ∧ (𝑥𝐵𝑦𝐵)) → (𝑥(+g𝑀)𝑦) ∈ 𝐵)
87ralrimivva 2624 . 2 (𝑀 ∈ Mnd → ∀𝑥𝐵𝑦𝐵 (𝑥(+g𝑀)𝑦) ∈ 𝐵)
92, 3, 5issubm 13674 . 2 (𝑀 ∈ Mnd → (𝐵 ∈ (SubMnd‘𝑀) ↔ (𝐵𝐵 ∧ (0g𝑀) ∈ 𝐵 ∧ ∀𝑥𝐵𝑦𝐵 (𝑥(+g𝑀)𝑦) ∈ 𝐵)))
101, 4, 8, 9mpbir3and 1207 1 (𝑀 ∈ Mnd → 𝐵 ∈ (SubMnd‘𝑀))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1398  wcel 2203  wral 2520  wss 3210  cfv 5351  (class class class)co 6049  Basecbs 13201  +gcplusg 13279  0gc0g 13458  Mndcmnd 13618  SubMndcsubmnd 13660
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-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-cnex 8214  ax-resscn 8215  ax-1re 8217  ax-addrcl 8220
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  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-ral 2525  df-rex 2526  df-reu 2527  df-rmo 2528  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-un 3214  df-in 3216  df-ss 3223  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-fn 5354  df-fv 5359  df-riota 6002  df-ov 6052  df-inn 9234  df-2 9292  df-ndx 13204  df-slot 13205  df-base 13207  df-plusg 13292  df-0g 13460  df-mgm 13558  df-sgrp 13604  df-mnd 13619  df-submnd 13662
This theorem is referenced by:  gsumwcl  13699
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