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| Mirrors > Home > ILE Home > Th. List > mndidcl | GIF version | ||
| Description: The identity element of a monoid belongs to the monoid. (Contributed by NM, 27-Aug-2011.) (Revised by Mario Carneiro, 27-Dec-2014.) |
| Ref | Expression |
|---|---|
| mndidcl.b | ⊢ 𝐵 = (Base‘𝐺) |
| mndidcl.o | ⊢ 0 = (0g‘𝐺) |
| Ref | Expression |
|---|---|
| mndidcl | ⊢ (𝐺 ∈ Mnd → 0 ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mndidcl.b | . 2 ⊢ 𝐵 = (Base‘𝐺) | |
| 2 | mndidcl.o | . 2 ⊢ 0 = (0g‘𝐺) | |
| 3 | eqid 2206 | . 2 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
| 4 | 1, 3 | mndid 13332 | . 2 ⊢ (𝐺 ∈ Mnd → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥(+g‘𝐺)𝑦) = 𝑦 ∧ (𝑦(+g‘𝐺)𝑥) = 𝑦)) |
| 5 | 1, 2, 3, 4 | mgmidcl 13285 | 1 ⊢ (𝐺 ∈ Mnd → 0 ∈ 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1373 ∈ wcel 2177 ‘cfv 5280 Basecbs 12907 +gcplusg 12984 0gc0g 13163 Mndcmnd 13323 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-sep 4170 ax-pow 4226 ax-pr 4261 ax-un 4488 ax-cnex 8036 ax-resscn 8037 ax-1re 8039 ax-addrcl 8042 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ral 2490 df-rex 2491 df-reu 2492 df-rmo 2493 df-rab 2494 df-v 2775 df-sbc 3003 df-csb 3098 df-un 3174 df-in 3176 df-ss 3183 df-pw 3623 df-sn 3644 df-pr 3645 df-op 3647 df-uni 3857 df-int 3892 df-br 4052 df-opab 4114 df-mpt 4115 df-id 4348 df-xp 4689 df-rel 4690 df-cnv 4691 df-co 4692 df-dm 4693 df-rn 4694 df-res 4695 df-iota 5241 df-fun 5282 df-fn 5283 df-fv 5288 df-riota 5912 df-ov 5960 df-inn 9057 df-2 9115 df-ndx 12910 df-slot 12911 df-base 12913 df-plusg 12997 df-0g 13165 df-mgm 13263 df-sgrp 13309 df-mnd 13324 |
| This theorem is referenced by: mndbn0 13338 hashfinmndnn 13339 mndpfo 13345 prdsidlem 13354 imasmnd 13360 idmhm 13376 mhmf1o 13377 issubmd 13381 submid 13384 0subm 13391 0mhm 13393 mhmco 13397 mhmeql 13399 gsumvallem2 13400 gsumfzz 13402 gsumfzcl 13406 dfgrp2 13434 grpidcl 13436 mhmid 13526 mhmmnd 13527 mulgnn0cl 13549 mulgnn0z 13560 gsumfzmptfidmadd 13750 srgidcl 13813 srg0cl 13814 ringidcl 13857 |
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