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Mirrors > Home > MPE Home > Th. List > subcmn | Structured version Visualization version GIF version |
Description: A submonoid of a commutative monoid is also commutative. (Contributed by Mario Carneiro, 10-Jan-2015.) |
Ref | Expression |
---|---|
subgabl.h | ⊢ 𝐻 = (𝐺 ↾s 𝑆) |
Ref | Expression |
---|---|
subcmn | ⊢ ((𝐺 ∈ CMnd ∧ 𝐻 ∈ Mnd) → 𝐻 ∈ CMnd) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqidd 2735 | . 2 ⊢ ((𝐺 ∈ CMnd ∧ 𝐻 ∈ Mnd) → (Base‘𝐻) = (Base‘𝐻)) | |
2 | eqid 2734 | . . . . . . 7 ⊢ (Base‘𝐻) = (Base‘𝐻) | |
3 | eqid 2734 | . . . . . . 7 ⊢ (0g‘𝐻) = (0g‘𝐻) | |
4 | 2, 3 | mndidcl 18774 | . . . . . 6 ⊢ (𝐻 ∈ Mnd → (0g‘𝐻) ∈ (Base‘𝐻)) |
5 | n0i 4345 | . . . . . 6 ⊢ ((0g‘𝐻) ∈ (Base‘𝐻) → ¬ (Base‘𝐻) = ∅) | |
6 | 4, 5 | syl 17 | . . . . 5 ⊢ (𝐻 ∈ Mnd → ¬ (Base‘𝐻) = ∅) |
7 | subgabl.h | . . . . . . . 8 ⊢ 𝐻 = (𝐺 ↾s 𝑆) | |
8 | reldmress 17275 | . . . . . . . . 9 ⊢ Rel dom ↾s | |
9 | 8 | ovprc2 7470 | . . . . . . . 8 ⊢ (¬ 𝑆 ∈ V → (𝐺 ↾s 𝑆) = ∅) |
10 | 7, 9 | eqtrid 2786 | . . . . . . 7 ⊢ (¬ 𝑆 ∈ V → 𝐻 = ∅) |
11 | 10 | fveq2d 6910 | . . . . . 6 ⊢ (¬ 𝑆 ∈ V → (Base‘𝐻) = (Base‘∅)) |
12 | base0 17249 | . . . . . 6 ⊢ ∅ = (Base‘∅) | |
13 | 11, 12 | eqtr4di 2792 | . . . . 5 ⊢ (¬ 𝑆 ∈ V → (Base‘𝐻) = ∅) |
14 | 6, 13 | nsyl2 141 | . . . 4 ⊢ (𝐻 ∈ Mnd → 𝑆 ∈ V) |
15 | 14 | adantl 481 | . . 3 ⊢ ((𝐺 ∈ CMnd ∧ 𝐻 ∈ Mnd) → 𝑆 ∈ V) |
16 | eqid 2734 | . . . 4 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
17 | 7, 16 | ressplusg 17335 | . . 3 ⊢ (𝑆 ∈ V → (+g‘𝐺) = (+g‘𝐻)) |
18 | 15, 17 | syl 17 | . 2 ⊢ ((𝐺 ∈ CMnd ∧ 𝐻 ∈ Mnd) → (+g‘𝐺) = (+g‘𝐻)) |
19 | simpr 484 | . 2 ⊢ ((𝐺 ∈ CMnd ∧ 𝐻 ∈ Mnd) → 𝐻 ∈ Mnd) | |
20 | simpl 482 | . . 3 ⊢ ((𝐺 ∈ CMnd ∧ 𝐻 ∈ Mnd) → 𝐺 ∈ CMnd) | |
21 | eqid 2734 | . . . . 5 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
22 | 7, 21 | ressbasss 17283 | . . . 4 ⊢ (Base‘𝐻) ⊆ (Base‘𝐺) |
23 | 22 | sseli 3990 | . . 3 ⊢ (𝑥 ∈ (Base‘𝐻) → 𝑥 ∈ (Base‘𝐺)) |
24 | 22 | sseli 3990 | . . 3 ⊢ (𝑦 ∈ (Base‘𝐻) → 𝑦 ∈ (Base‘𝐺)) |
25 | 21, 16 | cmncom 19830 | . . 3 ⊢ ((𝐺 ∈ CMnd ∧ 𝑥 ∈ (Base‘𝐺) ∧ 𝑦 ∈ (Base‘𝐺)) → (𝑥(+g‘𝐺)𝑦) = (𝑦(+g‘𝐺)𝑥)) |
26 | 20, 23, 24, 25 | syl3an 1159 | . 2 ⊢ (((𝐺 ∈ CMnd ∧ 𝐻 ∈ Mnd) ∧ 𝑥 ∈ (Base‘𝐻) ∧ 𝑦 ∈ (Base‘𝐻)) → (𝑥(+g‘𝐺)𝑦) = (𝑦(+g‘𝐺)𝑥)) |
27 | 1, 18, 19, 26 | iscmnd 19826 | 1 ⊢ ((𝐺 ∈ CMnd ∧ 𝐻 ∈ Mnd) → 𝐻 ∈ CMnd) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1536 ∈ wcel 2105 Vcvv 3477 ∅c0 4338 ‘cfv 6562 (class class class)co 7430 Basecbs 17244 ↾s cress 17273 +gcplusg 17297 0gc0g 17485 Mndcmnd 18759 CMndccmn 19812 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1791 ax-4 1805 ax-5 1907 ax-6 1964 ax-7 2004 ax-8 2107 ax-9 2115 ax-10 2138 ax-11 2154 ax-12 2174 ax-ext 2705 ax-sep 5301 ax-nul 5311 ax-pow 5370 ax-pr 5437 ax-un 7753 ax-cnex 11208 ax-resscn 11209 ax-1cn 11210 ax-icn 11211 ax-addcl 11212 ax-addrcl 11213 ax-mulcl 11214 ax-mulrcl 11215 ax-mulcom 11216 ax-addass 11217 ax-mulass 11218 ax-distr 11219 ax-i2m1 11220 ax-1ne0 11221 ax-1rid 11222 ax-rnegex 11223 ax-rrecex 11224 ax-cnre 11225 ax-pre-lttri 11226 ax-pre-lttrn 11227 ax-pre-ltadd 11228 ax-pre-mulgt0 11229 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1539 df-fal 1549 df-ex 1776 df-nf 1780 df-sb 2062 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2726 df-clel 2813 df-nfc 2889 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3377 df-reu 3378 df-rab 3433 df-v 3479 df-sbc 3791 df-csb 3908 df-dif 3965 df-un 3967 df-in 3969 df-ss 3979 df-pss 3982 df-nul 4339 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-op 4637 df-uni 4912 df-iun 4997 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5582 df-eprel 5588 df-po 5596 df-so 5597 df-fr 5640 df-we 5642 df-xp 5694 df-rel 5695 df-cnv 5696 df-co 5697 df-dm 5698 df-rn 5699 df-res 5700 df-ima 5701 df-pred 6322 df-ord 6388 df-on 6389 df-lim 6390 df-suc 6391 df-iota 6515 df-fun 6564 df-fn 6565 df-f 6566 df-f1 6567 df-fo 6568 df-f1o 6569 df-fv 6570 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7887 df-2nd 8013 df-frecs 8304 df-wrecs 8335 df-recs 8409 df-rdg 8448 df-er 8743 df-en 8984 df-dom 8985 df-sdom 8986 df-pnf 11294 df-mnf 11295 df-xr 11296 df-ltxr 11297 df-le 11298 df-sub 11491 df-neg 11492 df-nn 12264 df-2 12326 df-sets 17197 df-slot 17215 df-ndx 17227 df-base 17245 df-ress 17274 df-plusg 17310 df-0g 17487 df-mgm 18665 df-sgrp 18744 df-mnd 18760 df-cmn 19814 |
This theorem is referenced by: submcmn 19870 unitabl 20400 subrgcrng 20591 xrge0cmn 21443 tsmssubm 24166 amgmlem 27047 amgmwlem 49032 amgmlemALT 49033 |
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