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Mirrors > Home > MPE Home > Th. List > efmndid | Structured version Visualization version GIF version |
Description: The identity function restricted to a set 𝐴 is the identity element of the monoid of endofunctions on 𝐴. (Contributed by AV, 25-Jan-2024.) |
Ref | Expression |
---|---|
ielefmnd.g | ⊢ 𝐺 = (EndoFMnd‘𝐴) |
Ref | Expression |
---|---|
efmndid | ⊢ (𝐴 ∈ 𝑉 → ( I ↾ 𝐴) = (0g‘𝐺)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2820 | . 2 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
2 | eqid 2820 | . 2 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
3 | eqid 2820 | . 2 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
4 | ielefmnd.g | . . 3 ⊢ 𝐺 = (EndoFMnd‘𝐴) | |
5 | 4 | ielefmnd 18045 | . 2 ⊢ (𝐴 ∈ 𝑉 → ( I ↾ 𝐴) ∈ (Base‘𝐺)) |
6 | 4, 1, 3 | efmndov 18039 | . . . 4 ⊢ ((( I ↾ 𝐴) ∈ (Base‘𝐺) ∧ 𝑓 ∈ (Base‘𝐺)) → (( I ↾ 𝐴)(+g‘𝐺)𝑓) = (( I ↾ 𝐴) ∘ 𝑓)) |
7 | 5, 6 | sylan 582 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (( I ↾ 𝐴)(+g‘𝐺)𝑓) = (( I ↾ 𝐴) ∘ 𝑓)) |
8 | 4, 1 | efmndbasf 18033 | . . . . 5 ⊢ (𝑓 ∈ (Base‘𝐺) → 𝑓:𝐴⟶𝐴) |
9 | 8 | adantl 484 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → 𝑓:𝐴⟶𝐴) |
10 | fcoi2 6546 | . . . 4 ⊢ (𝑓:𝐴⟶𝐴 → (( I ↾ 𝐴) ∘ 𝑓) = 𝑓) | |
11 | 9, 10 | syl 17 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (( I ↾ 𝐴) ∘ 𝑓) = 𝑓) |
12 | 7, 11 | eqtrd 2855 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (( I ↾ 𝐴)(+g‘𝐺)𝑓) = 𝑓) |
13 | 5 | anim1ci 617 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (𝑓 ∈ (Base‘𝐺) ∧ ( I ↾ 𝐴) ∈ (Base‘𝐺))) |
14 | 4, 1, 3 | efmndov 18039 | . . . 4 ⊢ ((𝑓 ∈ (Base‘𝐺) ∧ ( I ↾ 𝐴) ∈ (Base‘𝐺)) → (𝑓(+g‘𝐺)( I ↾ 𝐴)) = (𝑓 ∘ ( I ↾ 𝐴))) |
15 | 13, 14 | syl 17 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (𝑓(+g‘𝐺)( I ↾ 𝐴)) = (𝑓 ∘ ( I ↾ 𝐴))) |
16 | fcoi1 6545 | . . . 4 ⊢ (𝑓:𝐴⟶𝐴 → (𝑓 ∘ ( I ↾ 𝐴)) = 𝑓) | |
17 | 9, 16 | syl 17 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (𝑓 ∘ ( I ↾ 𝐴)) = 𝑓) |
18 | 15, 17 | eqtrd 2855 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑓 ∈ (Base‘𝐺)) → (𝑓(+g‘𝐺)( I ↾ 𝐴)) = 𝑓) |
19 | 1, 2, 3, 5, 12, 18 | ismgmid2 17871 | 1 ⊢ (𝐴 ∈ 𝑉 → ( I ↾ 𝐴) = (0g‘𝐺)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1536 ∈ wcel 2113 I cid 5452 ↾ cres 5550 ∘ ccom 5552 ⟶wf 6344 ‘cfv 6348 (class class class)co 7149 Basecbs 16476 +gcplusg 16558 0gc0g 16706 EndoFMndcefmnd 18026 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2792 ax-rep 5183 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5323 ax-un 7454 ax-cnex 10586 ax-resscn 10587 ax-1cn 10588 ax-icn 10589 ax-addcl 10590 ax-addrcl 10591 ax-mulcl 10592 ax-mulrcl 10593 ax-mulcom 10594 ax-addass 10595 ax-mulass 10596 ax-distr 10597 ax-i2m1 10598 ax-1ne0 10599 ax-1rid 10600 ax-rnegex 10601 ax-rrecex 10602 ax-cnre 10603 ax-pre-lttri 10604 ax-pre-lttrn 10605 ax-pre-ltadd 10606 ax-pre-mulgt0 10607 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1083 df-3an 1084 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2799 df-cleq 2813 df-clel 2892 df-nfc 2962 df-ne 3016 df-nel 3123 df-ral 3142 df-rex 3143 df-reu 3144 df-rmo 3145 df-rab 3146 df-v 3493 df-sbc 3769 df-csb 3877 df-dif 3932 df-un 3934 df-in 3936 df-ss 3945 df-pss 3947 df-nul 4285 df-if 4461 df-pw 4534 df-sn 4561 df-pr 4563 df-tp 4565 df-op 4567 df-uni 4832 df-int 4870 df-iun 4914 df-br 5060 df-opab 5122 df-mpt 5140 df-tr 5166 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-riota 7107 df-ov 7152 df-oprab 7153 df-mpo 7154 df-om 7574 df-1st 7682 df-2nd 7683 df-wrecs 7940 df-recs 8001 df-rdg 8039 df-1o 8095 df-oadd 8099 df-er 8282 df-map 8401 df-en 8503 df-dom 8504 df-sdom 8505 df-fin 8506 df-pnf 10670 df-mnf 10671 df-xr 10672 df-ltxr 10673 df-le 10674 df-sub 10865 df-neg 10866 df-nn 11632 df-2 11694 df-3 11695 df-4 11696 df-5 11697 df-6 11698 df-7 11699 df-8 11700 df-9 11701 df-n0 11892 df-z 11976 df-uz 12238 df-fz 12890 df-struct 16478 df-ndx 16479 df-slot 16480 df-base 16482 df-plusg 16571 df-tset 16577 df-0g 16708 df-efmnd 18027 |
This theorem is referenced by: sursubmefmnd 18054 injsubmefmnd 18055 idressubmefmnd 18056 smndex1n0mnd 18070 smndex2dnrinv 18073 smndex2dlinvh 18075 symgid 18522 symgsubmefmndALT 18524 |
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