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Theorem 0subm 13512
Description: The zero submonoid of an arbitrary monoid. (Contributed by AV, 17-Feb-2024.)
Hypothesis
Ref Expression
0subm.z 0 = (0g𝐺)
Assertion
Ref Expression
0subm (𝐺 ∈ Mnd → { 0 } ∈ (SubMnd‘𝐺))

Proof of Theorem 0subm
Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2229 . . . 4 (Base‘𝐺) = (Base‘𝐺)
2 0subm.z . . . 4 0 = (0g𝐺)
31, 2mndidcl 13458 . . 3 (𝐺 ∈ Mnd → 0 ∈ (Base‘𝐺))
43snssd 3812 . 2 (𝐺 ∈ Mnd → { 0 } ⊆ (Base‘𝐺))
5 snidg 3695 . . 3 ( 0 ∈ (Base‘𝐺) → 0 ∈ { 0 })
63, 5syl 14 . 2 (𝐺 ∈ Mnd → 0 ∈ { 0 })
7 velsn 3683 . . . . 5 (𝑎 ∈ { 0 } ↔ 𝑎 = 0 )
8 velsn 3683 . . . . 5 (𝑏 ∈ { 0 } ↔ 𝑏 = 0 )
97, 8anbi12i 460 . . . 4 ((𝑎 ∈ { 0 } ∧ 𝑏 ∈ { 0 }) ↔ (𝑎 = 0𝑏 = 0 ))
10 eqid 2229 . . . . . . . 8 (+g𝐺) = (+g𝐺)
111, 10, 2mndlid 13463 . . . . . . 7 ((𝐺 ∈ Mnd ∧ 0 ∈ (Base‘𝐺)) → ( 0 (+g𝐺) 0 ) = 0 )
123, 11mpdan 421 . . . . . 6 (𝐺 ∈ Mnd → ( 0 (+g𝐺) 0 ) = 0 )
1312, 3eqeltrd 2306 . . . . . . 7 (𝐺 ∈ Mnd → ( 0 (+g𝐺) 0 ) ∈ (Base‘𝐺))
14 elsng 3681 . . . . . . 7 (( 0 (+g𝐺) 0 ) ∈ (Base‘𝐺) → (( 0 (+g𝐺) 0 ) ∈ { 0 } ↔ ( 0 (+g𝐺) 0 ) = 0 ))
1513, 14syl 14 . . . . . 6 (𝐺 ∈ Mnd → (( 0 (+g𝐺) 0 ) ∈ { 0 } ↔ ( 0 (+g𝐺) 0 ) = 0 ))
1612, 15mpbird 167 . . . . 5 (𝐺 ∈ Mnd → ( 0 (+g𝐺) 0 ) ∈ { 0 })
17 oveq12 6009 . . . . . 6 ((𝑎 = 0𝑏 = 0 ) → (𝑎(+g𝐺)𝑏) = ( 0 (+g𝐺) 0 ))
1817eleq1d 2298 . . . . 5 ((𝑎 = 0𝑏 = 0 ) → ((𝑎(+g𝐺)𝑏) ∈ { 0 } ↔ ( 0 (+g𝐺) 0 ) ∈ { 0 }))
1916, 18syl5ibrcom 157 . . . 4 (𝐺 ∈ Mnd → ((𝑎 = 0𝑏 = 0 ) → (𝑎(+g𝐺)𝑏) ∈ { 0 }))
209, 19biimtrid 152 . . 3 (𝐺 ∈ Mnd → ((𝑎 ∈ { 0 } ∧ 𝑏 ∈ { 0 }) → (𝑎(+g𝐺)𝑏) ∈ { 0 }))
2120ralrimivv 2611 . 2 (𝐺 ∈ Mnd → ∀𝑎 ∈ { 0 }∀𝑏 ∈ { 0 } (𝑎(+g𝐺)𝑏) ∈ { 0 })
221, 2, 10issubm 13500 . 2 (𝐺 ∈ Mnd → ({ 0 } ∈ (SubMnd‘𝐺) ↔ ({ 0 } ⊆ (Base‘𝐺) ∧ 0 ∈ { 0 } ∧ ∀𝑎 ∈ { 0 }∀𝑏 ∈ { 0 } (𝑎(+g𝐺)𝑏) ∈ { 0 })))
234, 6, 21, 22mpbir3and 1204 1 (𝐺 ∈ Mnd → { 0 } ∈ (SubMnd‘𝐺))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105   = wceq 1395  wcel 2200  wral 2508  wss 3197  {csn 3666  cfv 5317  (class class class)co 6000  Basecbs 13027  +gcplusg 13105  0gc0g 13284  Mndcmnd 13444  SubMndcsubmnd 13486
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4201  ax-pow 4257  ax-pr 4292  ax-un 4523  ax-cnex 8086  ax-resscn 8087  ax-1re 8089  ax-addrcl 8092
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-reu 2515  df-rmo 2516  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-int 3923  df-br 4083  df-opab 4145  df-mpt 4146  df-id 4383  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-rn 4729  df-res 4730  df-iota 5277  df-fun 5319  df-fn 5320  df-fv 5325  df-riota 5953  df-ov 6003  df-inn 9107  df-2 9165  df-ndx 13030  df-slot 13031  df-base 13033  df-plusg 13118  df-0g 13286  df-mgm 13384  df-sgrp 13430  df-mnd 13445  df-submnd 13488
This theorem is referenced by:  0subg  13731
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