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| Mirrors > Home > MPE Home > Th. List > cntrcmnd | Structured version Visualization version GIF version | ||
| Description: The center of a monoid is a commutative submonoid. (Contributed by Thierry Arnoux, 21-Aug-2023.) |
| Ref | Expression |
|---|---|
| cntrcmnd.z | ⊢ 𝑍 = (𝑀 ↾s (Cntr‘𝑀)) |
| Ref | Expression |
|---|---|
| cntrcmnd | ⊢ (𝑀 ∈ Mnd → 𝑍 ∈ CMnd) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2762 | . . . 4 ⊢ (Base‘𝑀) = (Base‘𝑀) | |
| 2 | 1 | cntrss 19407 | . . 3 ⊢ (Cntr‘𝑀) ⊆ (Base‘𝑀) |
| 3 | cntrcmnd.z | . . . 4 ⊢ 𝑍 = (𝑀 ↾s (Cntr‘𝑀)) | |
| 4 | 3, 1 | ressbas2 17304 | . . 3 ⊢ ((Cntr‘𝑀) ⊆ (Base‘𝑀) → (Cntr‘𝑀) = (Base‘𝑍)) |
| 5 | 2, 4 | mp1i 14 | . 2 ⊢ (𝑀 ∈ Mnd → (Cntr‘𝑀) = (Base‘𝑍)) |
| 6 | fvex 6894 | . . 3 ⊢ (Cntr‘𝑀) ∈ V | |
| 7 | eqid 2762 | . . . 4 ⊢ (+g‘𝑀) = (+g‘𝑀) | |
| 8 | 3, 7 | ressplusg 17350 | . . 3 ⊢ ((Cntr‘𝑀) ∈ V → (+g‘𝑀) = (+g‘𝑍)) |
| 9 | 6, 8 | mp1i 14 | . 2 ⊢ (𝑀 ∈ Mnd → (+g‘𝑀) = (+g‘𝑍)) |
| 10 | eqid 2762 | . . . . 5 ⊢ (Cntz‘𝑀) = (Cntz‘𝑀) | |
| 11 | 1, 10 | cntrval 19395 | . . . 4 ⊢ ((Cntz‘𝑀)‘(Base‘𝑀)) = (Cntr‘𝑀) |
| 12 | ssid 3958 | . . . . 5 ⊢ (Base‘𝑀) ⊆ (Base‘𝑀) | |
| 13 | 1, 10 | cntzsubm 19414 | . . . . 5 ⊢ ((𝑀 ∈ Mnd ∧ (Base‘𝑀) ⊆ (Base‘𝑀)) → ((Cntz‘𝑀)‘(Base‘𝑀)) ∈ (SubMnd‘𝑀)) |
| 14 | 12, 13 | mpan2 703 | . . . 4 ⊢ (𝑀 ∈ Mnd → ((Cntz‘𝑀)‘(Base‘𝑀)) ∈ (SubMnd‘𝑀)) |
| 15 | 11, 14 | eqeltrrid 2867 | . . 3 ⊢ (𝑀 ∈ Mnd → (Cntr‘𝑀) ∈ (SubMnd‘𝑀)) |
| 16 | 3 | submmnd 18878 | . . 3 ⊢ ((Cntr‘𝑀) ∈ (SubMnd‘𝑀) → 𝑍 ∈ Mnd) |
| 17 | 15, 16 | syl 18 | . 2 ⊢ (𝑀 ∈ Mnd → 𝑍 ∈ Mnd) |
| 18 | simp2 1154 | . . 3 ⊢ ((𝑀 ∈ Mnd ∧ 𝑥 ∈ (Cntr‘𝑀) ∧ 𝑦 ∈ (Cntr‘𝑀)) → 𝑥 ∈ (Cntr‘𝑀)) | |
| 19 | simp3 1155 | . . . 4 ⊢ ((𝑀 ∈ Mnd ∧ 𝑥 ∈ (Cntr‘𝑀) ∧ 𝑦 ∈ (Cntr‘𝑀)) → 𝑦 ∈ (Cntr‘𝑀)) | |
| 20 | 2, 19 | sselid 3934 | . . 3 ⊢ ((𝑀 ∈ Mnd ∧ 𝑥 ∈ (Cntr‘𝑀) ∧ 𝑦 ∈ (Cntr‘𝑀)) → 𝑦 ∈ (Base‘𝑀)) |
| 21 | eqid 2762 | . . . 4 ⊢ (Cntr‘𝑀) = (Cntr‘𝑀) | |
| 22 | 1, 7, 21 | cntri 19408 | . . 3 ⊢ ((𝑥 ∈ (Cntr‘𝑀) ∧ 𝑦 ∈ (Base‘𝑀)) → (𝑥(+g‘𝑀)𝑦) = (𝑦(+g‘𝑀)𝑥)) |
| 23 | 18, 20, 22 | syl2anc 595 | . 2 ⊢ ((𝑀 ∈ Mnd ∧ 𝑥 ∈ (Cntr‘𝑀) ∧ 𝑦 ∈ (Cntr‘𝑀)) → (𝑥(+g‘𝑀)𝑦) = (𝑦(+g‘𝑀)𝑥)) |
| 24 | 5, 9, 17, 23 | iscmnd 19870 | 1 ⊢ (𝑀 ∈ Mnd → 𝑍 ∈ CMnd) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ w3a 1102 = wceq 1569 ∈ wcel 2142 Vcvv 3454 ⊆ wss 3904 ‘cfv 6536 (class class class)co 7412 Basecbs 17275 ↾s cress 17296 +gcplusg 17316 Mndcmnd 18798 SubMndcsubmnd 18846 Cntzccntz 19391 Cntrccntr 19392 CMndccmn 19856 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7861 df-2nd 7985 df-frecs 8276 df-wrecs 8307 df-recs 8356 df-rdg 8395 df-er 8692 df-en 8942 df-dom 8943 df-sdom 8944 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11449 df-neg 11450 df-nn 12240 df-2 12309 df-sets 17230 df-slot 17248 df-ndx 17260 df-base 17276 df-ress 17297 df-plusg 17329 df-0g 17500 df-mgm 18704 df-sgrp 18783 df-mnd 18799 df-submnd 18848 df-cntz 19393 df-cntr 19394 df-cmn 19858 |
| This theorem is used by: cntrabl 19919 cntrcrng 33410 |
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