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| Mirrors > Home > MPE Home > Th. List > efmndmnd | Structured version Visualization version GIF version | ||
| Description: The monoid of endofunctions on a set 𝐴 is actually a monoid. (Contributed by AV, 31-Jan-2024.) |
| Ref | Expression |
|---|---|
| ielefmnd.g | ⊢ 𝐺 = (EndoFMnd‘𝐴) |
| Ref | Expression |
|---|---|
| efmndmnd | ⊢ (𝐴 ∈ 𝑉 → 𝐺 ∈ Mnd) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ielefmnd.g | . . . 4 ⊢ 𝐺 = (EndoFMnd‘𝐴) | |
| 2 | 1 | efmndsgrp 18998 | . . 3 ⊢ 𝐺 ∈ Smgrp |
| 3 | 2 | a1i 11 | . 2 ⊢ (𝐴 ∈ 𝑉 → 𝐺 ∈ Smgrp) |
| 4 | 1 | ielefmnd 18999 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ( I ↾ 𝐴) ∈ (Base‘𝐺)) |
| 5 | oveq1 7421 | . . . . . . 7 ⊢ (𝑖 = ( I ↾ 𝐴) → (𝑖(+g‘𝐺)𝑓) = (( I ↾ 𝐴)(+g‘𝐺)𝑓)) | |
| 6 | 5 | eqeq1d 2762 | . . . . . 6 ⊢ (𝑖 = ( I ↾ 𝐴) → ((𝑖(+g‘𝐺)𝑓) = 𝑓 ↔ (( I ↾ 𝐴)(+g‘𝐺)𝑓) = 𝑓)) |
| 7 | oveq2 7422 | . . . . . . 7 ⊢ (𝑖 = ( I ↾ 𝐴) → (𝑓(+g‘𝐺)𝑖) = (𝑓(+g‘𝐺)( I ↾ 𝐴))) | |
| 8 | 7 | eqeq1d 2762 | . . . . . 6 ⊢ (𝑖 = ( I ↾ 𝐴) → ((𝑓(+g‘𝐺)𝑖) = 𝑓 ↔ (𝑓(+g‘𝐺)( I ↾ 𝐴)) = 𝑓)) |
| 9 | 6, 8 | anbi12d 644 | . . . . 5 ⊢ (𝑖 = ( I ↾ 𝐴) → (((𝑖(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)𝑖) = 𝑓) ↔ ((( I ↾ 𝐴)(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)( I ↾ 𝐴)) = 𝑓))) |
| 10 | 9 | ralbidv 3185 | . . . 4 ⊢ (𝑖 = ( I ↾ 𝐴) → (∀𝑓 ∈ (Base‘𝐺)((𝑖(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)𝑖) = 𝑓) ↔ ∀𝑓 ∈ (Base‘𝐺)((( I ↾ 𝐴)(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)( I ↾ 𝐴)) = 𝑓))) |
| 11 | 10 | adantl 487 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑖 = ( I ↾ 𝐴)) → (∀𝑓 ∈ (Base‘𝐺)((𝑖(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)𝑖) = 𝑓) ↔ ∀𝑓 ∈ (Base‘𝐺)((( I ↾ 𝐴)(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)( I ↾ 𝐴)) = 𝑓))) |
| 12 | eqid 2760 | . . . . . . . 8 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
| 13 | 1, 12 | efmndbasf 18987 | . . . . . . 7 ⊢ (𝑓 ∈ (Base‘𝐺) → 𝑓:𝐴⟶𝐴) |
| 14 | 13 | adantl 487 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → 𝑓:𝐴⟶𝐴) |
| 15 | fcoi2 6751 | . . . . . . 7 ⊢ (𝑓:𝐴⟶𝐴 → (( I ↾ 𝐴) ∘ 𝑓) = 𝑓) | |
| 16 | fcoi1 6750 | . . . . . . 7 ⊢ (𝑓:𝐴⟶𝐴 → (𝑓 ∘ ( I ↾ 𝐴)) = 𝑓) | |
| 17 | 15, 16 | jca 521 | . . . . . 6 ⊢ (𝑓:𝐴⟶𝐴 → ((( I ↾ 𝐴) ∘ 𝑓) = 𝑓 ∧ (𝑓 ∘ ( I ↾ 𝐴)) = 𝑓)) |
| 18 | 14, 17 | syl 18 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → ((( I ↾ 𝐴) ∘ 𝑓) = 𝑓 ∧ (𝑓 ∘ ( I ↾ 𝐴)) = 𝑓)) |
| 19 | eqid 2760 | . . . . . . . . 9 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
| 20 | 1, 12, 19 | efmndov 18993 | . . . . . . . 8 ⊢ ((( I ↾ 𝐴) ∈ (Base‘𝐺) ∧ 𝑓 ∈ (Base‘𝐺)) → (( I ↾ 𝐴)(+g‘𝐺)𝑓) = (( I ↾ 𝐴) ∘ 𝑓)) |
| 21 | 4, 20 | sylan 592 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (( I ↾ 𝐴)(+g‘𝐺)𝑓) = (( I ↾ 𝐴) ∘ 𝑓)) |
| 22 | 21 | eqeq1d 2762 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → ((( I ↾ 𝐴)(+g‘𝐺)𝑓) = 𝑓 ↔ (( I ↾ 𝐴) ∘ 𝑓) = 𝑓)) |
| 23 | 4 | anim1ci 628 | . . . . . . . 8 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (𝑓 ∈ (Base‘𝐺) ∧ ( I ↾ 𝐴) ∈ (Base‘𝐺))) |
| 24 | 1, 12, 19 | efmndov 18993 | . . . . . . . 8 ⊢ ((𝑓 ∈ (Base‘𝐺) ∧ ( I ↾ 𝐴) ∈ (Base‘𝐺)) → (𝑓(+g‘𝐺)( I ↾ 𝐴)) = (𝑓 ∘ ( I ↾ 𝐴))) |
| 25 | 23, 24 | syl 18 | . . . . . . 7 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (𝑓(+g‘𝐺)( I ↾ 𝐴)) = (𝑓 ∘ ( I ↾ 𝐴))) |
| 26 | 25 | eqeq1d 2762 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → ((𝑓(+g‘𝐺)( I ↾ 𝐴)) = 𝑓 ↔ (𝑓 ∘ ( I ↾ 𝐴)) = 𝑓)) |
| 27 | 22, 26 | anbi12d 644 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (((( I ↾ 𝐴)(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)( I ↾ 𝐴)) = 𝑓) ↔ ((( I ↾ 𝐴) ∘ 𝑓) = 𝑓 ∧ (𝑓 ∘ ( I ↾ 𝐴)) = 𝑓))) |
| 28 | 18, 27 | mpbird 260 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → ((( I ↾ 𝐴)(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)( I ↾ 𝐴)) = 𝑓)) |
| 29 | 28 | ralrimiva 3154 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ∀𝑓 ∈ (Base‘𝐺)((( I ↾ 𝐴)(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)( I ↾ 𝐴)) = 𝑓)) |
| 30 | 4, 11, 29 | rspcedvd 3578 | . 2 ⊢ (𝐴 ∈ 𝑉 → ∃𝑖 ∈ (Base‘𝐺)∀𝑓 ∈ (Base‘𝐺)((𝑖(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)𝑖) = 𝑓)) |
| 31 | 12, 19 | ismnddef 18841 | . 2 ⊢ (𝐺 ∈ Mnd ↔ (𝐺 ∈ Smgrp ∧ ∃𝑖 ∈ (Base‘𝐺)∀𝑓 ∈ (Base‘𝐺)((𝑖(+g‘𝐺)𝑓) = 𝑓 ∧ (𝑓(+g‘𝐺)𝑖) = 𝑓))) |
| 32 | 3, 30, 31 | sylanbrc 595 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝐺 ∈ Mnd) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∀wral 3076 ∃wrex 3086 I cid 5549 ↾ cres 5657 ∘ ccom 5659 ⟶wf 6529 ‘cfv 6533 (class class class)co 7414 Basecbs 17304 +gcplusg 17345 Smgrpcsgrp 18823 Mndcmnd 18839 EndoFMndcefmnd 18980 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8458 df-er 8699 df-map 8831 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-nn 12261 df-2 12330 df-3 12331 df-4 12332 df-5 12333 df-6 12334 df-7 12335 df-8 12336 df-9 12337 df-n0 12532 df-z 12619 df-uz 12891 df-fz 13565 df-struct 17242 df-slot 17277 df-ndx 17289 df-base 17305 df-plusg 17358 df-tset 17364 df-mgm 18733 df-sgrp 18824 df-mnd 18840 df-efmnd 18981 |
| This theorem is used by: efmnd0nmnd 19002 submefmnd 19007 sursubmefmnd 19008 injsubmefmnd 19009 idressubmefmnd 19010 idresefmnd 19011 symgsubmefmndALT 19533 efmndtmd 24330 |
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