| Intuitionistic Logic Explorer | 
      
      
      < Previous  
      Next >
      
       Nearby theorems  | 
  ||
| Mirrors > Home > ILE Home > Th. List > 0subm | GIF version | ||
| Description: The zero submonoid of an arbitrary monoid. (Contributed by AV, 17-Feb-2024.) | 
| Ref | Expression | 
|---|---|
| 0subm.z | ⊢ 0 = (0g‘𝐺) | 
| Ref | Expression | 
|---|---|
| 0subm | ⊢ (𝐺 ∈ Mnd → { 0 } ∈ (SubMnd‘𝐺)) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | eqid 2196 | . . . 4 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
| 2 | 0subm.z | . . . 4 ⊢ 0 = (0g‘𝐺) | |
| 3 | 1, 2 | mndidcl 13071 | . . 3 ⊢ (𝐺 ∈ Mnd → 0 ∈ (Base‘𝐺)) | 
| 4 | 3 | snssd 3767 | . 2 ⊢ (𝐺 ∈ Mnd → { 0 } ⊆ (Base‘𝐺)) | 
| 5 | snidg 3651 | . . 3 ⊢ ( 0 ∈ (Base‘𝐺) → 0 ∈ { 0 }) | |
| 6 | 3, 5 | syl 14 | . 2 ⊢ (𝐺 ∈ Mnd → 0 ∈ { 0 }) | 
| 7 | velsn 3639 | . . . . 5 ⊢ (𝑎 ∈ { 0 } ↔ 𝑎 = 0 ) | |
| 8 | velsn 3639 | . . . . 5 ⊢ (𝑏 ∈ { 0 } ↔ 𝑏 = 0 ) | |
| 9 | 7, 8 | anbi12i 460 | . . . 4 ⊢ ((𝑎 ∈ { 0 } ∧ 𝑏 ∈ { 0 }) ↔ (𝑎 = 0 ∧ 𝑏 = 0 )) | 
| 10 | eqid 2196 | . . . . . . . 8 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
| 11 | 1, 10, 2 | mndlid 13076 | . . . . . . 7 ⊢ ((𝐺 ∈ Mnd ∧ 0 ∈ (Base‘𝐺)) → ( 0 (+g‘𝐺) 0 ) = 0 ) | 
| 12 | 3, 11 | mpdan 421 | . . . . . 6 ⊢ (𝐺 ∈ Mnd → ( 0 (+g‘𝐺) 0 ) = 0 ) | 
| 13 | 12, 3 | eqeltrd 2273 | . . . . . . 7 ⊢ (𝐺 ∈ Mnd → ( 0 (+g‘𝐺) 0 ) ∈ (Base‘𝐺)) | 
| 14 | elsng 3637 | . . . . . . 7 ⊢ (( 0 (+g‘𝐺) 0 ) ∈ (Base‘𝐺) → (( 0 (+g‘𝐺) 0 ) ∈ { 0 } ↔ ( 0 (+g‘𝐺) 0 ) = 0 )) | |
| 15 | 13, 14 | syl 14 | . . . . . 6 ⊢ (𝐺 ∈ Mnd → (( 0 (+g‘𝐺) 0 ) ∈ { 0 } ↔ ( 0 (+g‘𝐺) 0 ) = 0 )) | 
| 16 | 12, 15 | mpbird 167 | . . . . 5 ⊢ (𝐺 ∈ Mnd → ( 0 (+g‘𝐺) 0 ) ∈ { 0 }) | 
| 17 | oveq12 5931 | . . . . . 6 ⊢ ((𝑎 = 0 ∧ 𝑏 = 0 ) → (𝑎(+g‘𝐺)𝑏) = ( 0 (+g‘𝐺) 0 )) | |
| 18 | 17 | eleq1d 2265 | . . . . 5 ⊢ ((𝑎 = 0 ∧ 𝑏 = 0 ) → ((𝑎(+g‘𝐺)𝑏) ∈ { 0 } ↔ ( 0 (+g‘𝐺) 0 ) ∈ { 0 })) | 
| 19 | 16, 18 | syl5ibrcom 157 | . . . 4 ⊢ (𝐺 ∈ Mnd → ((𝑎 = 0 ∧ 𝑏 = 0 ) → (𝑎(+g‘𝐺)𝑏) ∈ { 0 })) | 
| 20 | 9, 19 | biimtrid 152 | . . 3 ⊢ (𝐺 ∈ Mnd → ((𝑎 ∈ { 0 } ∧ 𝑏 ∈ { 0 }) → (𝑎(+g‘𝐺)𝑏) ∈ { 0 })) | 
| 21 | 20 | ralrimivv 2578 | . 2 ⊢ (𝐺 ∈ Mnd → ∀𝑎 ∈ { 0 }∀𝑏 ∈ { 0 } (𝑎(+g‘𝐺)𝑏) ∈ { 0 }) | 
| 22 | 1, 2, 10 | issubm 13104 | . 2 ⊢ (𝐺 ∈ Mnd → ({ 0 } ∈ (SubMnd‘𝐺) ↔ ({ 0 } ⊆ (Base‘𝐺) ∧ 0 ∈ { 0 } ∧ ∀𝑎 ∈ { 0 }∀𝑏 ∈ { 0 } (𝑎(+g‘𝐺)𝑏) ∈ { 0 }))) | 
| 23 | 4, 6, 21, 22 | mpbir3and 1182 | 1 ⊢ (𝐺 ∈ Mnd → { 0 } ∈ (SubMnd‘𝐺)) | 
| Colors of variables: wff set class | 
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1364 ∈ wcel 2167 ∀wral 2475 ⊆ wss 3157 {csn 3622 ‘cfv 5258 (class class class)co 5922 Basecbs 12678 +gcplusg 12755 0gc0g 12927 Mndcmnd 13057 SubMndcsubmnd 13090 | 
| 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 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4151 ax-pow 4207 ax-pr 4242 ax-un 4468 ax-cnex 7970 ax-resscn 7971 ax-1re 7973 ax-addrcl 7976 | 
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-reu 2482 df-rmo 2483 df-rab 2484 df-v 2765 df-sbc 2990 df-csb 3085 df-un 3161 df-in 3163 df-ss 3170 df-pw 3607 df-sn 3628 df-pr 3629 df-op 3631 df-uni 3840 df-int 3875 df-br 4034 df-opab 4095 df-mpt 4096 df-id 4328 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-rn 4674 df-res 4675 df-iota 5219 df-fun 5260 df-fn 5261 df-fv 5266 df-riota 5877 df-ov 5925 df-inn 8991 df-2 9049 df-ndx 12681 df-slot 12682 df-base 12684 df-plusg 12768 df-0g 12929 df-mgm 12999 df-sgrp 13045 df-mnd 13058 df-submnd 13092 | 
| This theorem is referenced by: 0subg 13329 | 
| Copyright terms: Public domain | W3C validator |