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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-endcomp | Structured version Visualization version GIF version | ||
| Description: Composition law of the monoid of endomorphisms on an object of a category. (Contributed by BJ, 5-Apr-2024.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| bj-endval.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| bj-endval.x | ⊢ (𝜑 → 𝑋 ∈ (Base‘𝐶)) |
| Ref | Expression |
|---|---|
| bj-endcomp | ⊢ (𝜑 → (+g‘((End ‘𝐶)‘𝑋)) = (〈𝑋, 𝑋〉(comp‘𝐶)𝑋)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | plusgid 17375 | . . 3 ⊢ +g = Slot (+g‘ndx) | |
| 2 | fvexd 6897 | . . 3 ⊢ (𝜑 → ((End ‘𝐶)‘𝑋) ∈ V) | |
| 3 | 1, 2 | strfvnd 17283 | . 2 ⊢ (𝜑 → (+g‘((End ‘𝐶)‘𝑋)) = (((End ‘𝐶)‘𝑋)‘(+g‘ndx))) |
| 4 | bj-endval.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 5 | bj-endval.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ (Base‘𝐶)) | |
| 6 | 4, 5 | bj-endval 38075 | . . 3 ⊢ (𝜑 → ((End ‘𝐶)‘𝑋) = {〈(Base‘ndx), (𝑋(Hom ‘𝐶)𝑋)〉, 〈(+g‘ndx), (〈𝑋, 𝑋〉(comp‘𝐶)𝑋)〉}) |
| 7 | 6 | fveq1d 6884 | . 2 ⊢ (𝜑 → (((End ‘𝐶)‘𝑋)‘(+g‘ndx)) = ({〈(Base‘ndx), (𝑋(Hom ‘𝐶)𝑋)〉, 〈(+g‘ndx), (〈𝑋, 𝑋〉(comp‘𝐶)𝑋)〉}‘(+g‘ndx))) |
| 8 | basendxnplusgndx 17378 | . . 3 ⊢ (Base‘ndx) ≠ (+g‘ndx) | |
| 9 | fvex 6895 | . . . 4 ⊢ (+g‘ndx) ∈ V | |
| 10 | ovex 7450 | . . . 4 ⊢ (〈𝑋, 𝑋〉(comp‘𝐶)𝑋) ∈ V | |
| 11 | 9, 10 | fvpr2 7195 | . . 3 ⊢ ((Base‘ndx) ≠ (+g‘ndx) → ({〈(Base‘ndx), (𝑋(Hom ‘𝐶)𝑋)〉, 〈(+g‘ndx), (〈𝑋, 𝑋〉(comp‘𝐶)𝑋)〉}‘(+g‘ndx)) = (〈𝑋, 𝑋〉(comp‘𝐶)𝑋)) |
| 12 | 8, 11 | mp1i 14 | . 2 ⊢ (𝜑 → ({〈(Base‘ndx), (𝑋(Hom ‘𝐶)𝑋)〉, 〈(+g‘ndx), (〈𝑋, 𝑋〉(comp‘𝐶)𝑋)〉}‘(+g‘ndx)) = (〈𝑋, 𝑋〉(comp‘𝐶)𝑋)) |
| 13 | 3, 7, 12 | 3eqtrd 2801 | 1 ⊢ (𝜑 → (+g‘((End ‘𝐶)‘𝑋)) = (〈𝑋, 𝑋〉(comp‘𝐶)𝑋)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ≠ wne 2957 Vcvv 3453 {cpr 4589 〈cop 4593 ‘cfv 6537 (class class class)co 7417 ndxcnx 17291 Basecbs 17307 +gcplusg 17348 Hom chom 17359 compcco 17360 Catccat 17758 End cend 38073 |
| 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 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-cnex 11184 ax-resscn 11185 ax-1cn 11186 ax-icn 11187 ax-addcl 11188 ax-addrcl 11189 ax-mulcl 11190 ax-mulrcl 11191 ax-mulcom 11192 ax-addass 11193 ax-mulass 11194 ax-distr 11195 ax-i2m1 11196 ax-1ne0 11197 ax-1rid 11198 ax-rnegex 11199 ax-rrecex 11200 ax-cnre 11201 ax-pre-lttri 11202 ax-pre-lttrn 11203 ax-pre-ltadd 11204 ax-pre-mulgt0 11205 |
| 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 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-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7374 df-ov 7420 df-oprab 7421 df-mpo 7422 df-om 7867 df-2nd 7991 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-er 8700 df-en 8957 df-dom 8958 df-sdom 8959 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 df-sub 11471 df-neg 11472 df-nn 12262 df-2 12331 df-slot 17280 df-ndx 17292 df-base 17308 df-plusg 17361 df-bj-end 38074 |
| This theorem is used by: bj-endmnd 38078 |
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