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| 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 2238 | . . . 4 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
| 2 | 0subm.z | . . . 4 ⊢ 0 = (0g‘𝐺) | |
| 3 | 1, 2 | mndidcl 13743 | . . 3 ⊢ (𝐺 ∈ Mnd → 0 ∈ (Base‘𝐺)) |
| 4 | 3 | snssd 3860 | . 2 ⊢ (𝐺 ∈ Mnd → { 0 } ⊆ (Base‘𝐺)) |
| 5 | snidg 3738 | . . 3 ⊢ ( 0 ∈ (Base‘𝐺) → 0 ∈ { 0 }) | |
| 6 | 3, 5 | syl 14 | . 2 ⊢ (𝐺 ∈ Mnd → 0 ∈ { 0 }) |
| 7 | velsn 3726 | . . . . 5 ⊢ (𝑎 ∈ { 0 } ↔ 𝑎 = 0 ) | |
| 8 | velsn 3726 | . . . . 5 ⊢ (𝑏 ∈ { 0 } ↔ 𝑏 = 0 ) | |
| 9 | 7, 8 | anbi12i 464 | . . . 4 ⊢ ((𝑎 ∈ { 0 } ∧ 𝑏 ∈ { 0 }) ↔ (𝑎 = 0 ∧ 𝑏 = 0 )) |
| 10 | eqid 2238 | . . . . . . . 8 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
| 11 | 1, 10, 2 | mndlid 13748 | . . . . . . 7 ⊢ ((𝐺 ∈ Mnd ∧ 0 ∈ (Base‘𝐺)) → ( 0 (+g‘𝐺) 0 ) = 0 ) |
| 12 | 3, 11 | mpdan 425 | . . . . . 6 ⊢ (𝐺 ∈ Mnd → ( 0 (+g‘𝐺) 0 ) = 0 ) |
| 13 | 12, 3 | eqeltrd 2315 | . . . . . . 7 ⊢ (𝐺 ∈ Mnd → ( 0 (+g‘𝐺) 0 ) ∈ (Base‘𝐺)) |
| 14 | elsng 3724 | . . . . . . 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 6094 | . . . . . 6 ⊢ ((𝑎 = 0 ∧ 𝑏 = 0 ) → (𝑎(+g‘𝐺)𝑏) = ( 0 (+g‘𝐺) 0 )) | |
| 18 | 17 | eleq1d 2307 | . . . . 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 2631 | . 2 ⊢ (𝐺 ∈ Mnd → ∀𝑎 ∈ { 0 }∀𝑏 ∈ { 0 } (𝑎(+g‘𝐺)𝑏) ∈ { 0 }) |
| 22 | 1, 2, 10 | issubm 13779 | . 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 1211 | 1 ⊢ (𝐺 ∈ Mnd → { 0 } ∈ (SubMnd‘𝐺)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1402 ∈ wcel 2209 ∀wral 2528 ⊆ wss 3220 {csn 3709 ‘cfv 5377 (class class class)co 6085 Basecbs 13352 +gcplusg 13431 0gc0g 13610 Mndcmnd 13729 SubMndcsubmnd 13765 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-cnex 8270 ax-resscn 8271 ax-1re 8273 ax-addrcl 8276 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4131 df-opab 4193 df-mpt 4194 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-iota 5337 df-fun 5379 df-fn 5380 df-fv 5385 df-riota 6038 df-ov 6088 df-inn 9305 df-2 9363 df-ndx 13355 df-slot 13356 df-base 13358 df-plusg 13444 df-0g 13612 df-mgm 13676 df-sgrp 13717 df-mnd 13730 df-submnd 13767 |
| This theorem is used by: 0subg 14002 |
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