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Theorem 0subm 13566
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 2231 . . . 4 (Base‘𝐺) = (Base‘𝐺)
2 0subm.z . . . 4 0 = (0g𝐺)
31, 2mndidcl 13512 . . 3 (𝐺 ∈ Mnd → 0 ∈ (Base‘𝐺))
43snssd 3818 . 2 (𝐺 ∈ Mnd → { 0 } ⊆ (Base‘𝐺))
5 snidg 3698 . . 3 ( 0 ∈ (Base‘𝐺) → 0 ∈ { 0 })
63, 5syl 14 . 2 (𝐺 ∈ Mnd → 0 ∈ { 0 })
7 velsn 3686 . . . . 5 (𝑎 ∈ { 0 } ↔ 𝑎 = 0 )
8 velsn 3686 . . . . 5 (𝑏 ∈ { 0 } ↔ 𝑏 = 0 )
97, 8anbi12i 460 . . . 4 ((𝑎 ∈ { 0 } ∧ 𝑏 ∈ { 0 }) ↔ (𝑎 = 0𝑏 = 0 ))
10 eqid 2231 . . . . . . . 8 (+g𝐺) = (+g𝐺)
111, 10, 2mndlid 13517 . . . . . . 7 ((𝐺 ∈ Mnd ∧ 0 ∈ (Base‘𝐺)) → ( 0 (+g𝐺) 0 ) = 0 )
123, 11mpdan 421 . . . . . 6 (𝐺 ∈ Mnd → ( 0 (+g𝐺) 0 ) = 0 )
1312, 3eqeltrd 2308 . . . . . . 7 (𝐺 ∈ Mnd → ( 0 (+g𝐺) 0 ) ∈ (Base‘𝐺))
14 elsng 3684 . . . . . . 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 6026 . . . . . 6 ((𝑎 = 0𝑏 = 0 ) → (𝑎(+g𝐺)𝑏) = ( 0 (+g𝐺) 0 ))
1817eleq1d 2300 . . . . 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 2613 . 2 (𝐺 ∈ Mnd → ∀𝑎 ∈ { 0 }∀𝑏 ∈ { 0 } (𝑎(+g𝐺)𝑏) ∈ { 0 })
221, 2, 10issubm 13554 . 2 (𝐺 ∈ Mnd → ({ 0 } ∈ (SubMnd‘𝐺) ↔ ({ 0 } ⊆ (Base‘𝐺) ∧ 0 ∈ { 0 } ∧ ∀𝑎 ∈ { 0 }∀𝑏 ∈ { 0 } (𝑎(+g𝐺)𝑏) ∈ { 0 })))
234, 6, 21, 22mpbir3and 1206 1 (𝐺 ∈ Mnd → { 0 } ∈ (SubMnd‘𝐺))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105   = wceq 1397  wcel 2202  wral 2510  wss 3200  {csn 3669  cfv 5326  (class class class)co 6017  Basecbs 13081  +gcplusg 13159  0gc0g 13338  Mndcmnd 13498  SubMndcsubmnd 13540
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-cnex 8122  ax-resscn 8123  ax-1re 8125  ax-addrcl 8128
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-reu 2517  df-rmo 2518  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-iota 5286  df-fun 5328  df-fn 5329  df-fv 5334  df-riota 5970  df-ov 6020  df-inn 9143  df-2 9201  df-ndx 13084  df-slot 13085  df-base 13087  df-plusg 13172  df-0g 13340  df-mgm 13438  df-sgrp 13484  df-mnd 13499  df-submnd 13542
This theorem is referenced by:  0subg  13785
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