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| Mirrors > Home > MPE Home > Th. List > diagcl | Structured version Visualization version GIF version | ||
| Description: The diagonal functor is a functor from the base category to the functor category. Another way of saying this is that the constant functor (𝑦 ∈ 𝐷 ↦ 𝑋) is a construction that is natural in 𝑋 (and covariant). (Contributed by Mario Carneiro, 7-Jan-2017.) (Revised by Mario Carneiro, 15-Jan-2017.) |
| Ref | Expression |
|---|---|
| diagval.l | ⊢ 𝐿 = (𝐶Δfunc𝐷) |
| diagval.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| diagval.d | ⊢ (𝜑 → 𝐷 ∈ Cat) |
| diagcl.q | ⊢ 𝑄 = (𝐷 FuncCat 𝐶) |
| Ref | Expression |
|---|---|
| diagcl | ⊢ (𝜑 → 𝐿 ∈ (𝐶 Func 𝑄)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | diagval.l | . . 3 ⊢ 𝐿 = (𝐶Δfunc𝐷) | |
| 2 | diagval.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 3 | diagval.d | . . 3 ⊢ (𝜑 → 𝐷 ∈ Cat) | |
| 4 | 1, 2, 3 | diagval 18407 | . 2 ⊢ (𝜑 → 𝐿 = (〈𝐶, 𝐷〉 curryF (𝐶 1stF 𝐷))) |
| 5 | eqid 2761 | . . 3 ⊢ (〈𝐶, 𝐷〉 curryF (𝐶 1stF 𝐷)) = (〈𝐶, 𝐷〉 curryF (𝐶 1stF 𝐷)) | |
| 6 | diagcl.q | . . 3 ⊢ 𝑄 = (𝐷 FuncCat 𝐶) | |
| 7 | eqid 2761 | . . . 4 ⊢ (𝐶 ×c 𝐷) = (𝐶 ×c 𝐷) | |
| 8 | eqid 2761 | . . . 4 ⊢ (𝐶 1stF 𝐷) = (𝐶 1stF 𝐷) | |
| 9 | 7, 2, 3, 8 | 1stfcl 18364 | . . 3 ⊢ (𝜑 → (𝐶 1stF 𝐷) ∈ ((𝐶 ×c 𝐷) Func 𝐶)) |
| 10 | 5, 6, 2, 3, 9 | curfcl 18399 | . 2 ⊢ (𝜑 → (〈𝐶, 𝐷〉 curryF (𝐶 1stF 𝐷)) ∈ (𝐶 Func 𝑄)) |
| 11 | 4, 10 | eqeltrd 2861 | 1 ⊢ (𝜑 → 𝐿 ∈ (𝐶 Func 𝑄)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 〈cop 4590 (class class class)co 7418 Catccat 17831 Func cfunc 18022 FuncCat cfuc 18113 ×c cxpc 18335 1stF c1stf 18336 curryF ccurf 18377 Δfunccdiag 18379 |
| 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 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-cnex 11249 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 ax-pre-mulgt0 11270 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 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 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 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 7375 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-1st 7999 df-2nd 8000 df-frecs 8292 df-wrecs 8323 df-recs 8372 df-rdg 8411 df-1o 8469 df-er 8710 df-map 8842 df-ixp 8919 df-en 8967 df-dom 8968 df-sdom 8969 df-fin 8970 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-sub 11536 df-neg 11537 df-nn 12329 df-2 12398 df-3 12399 df-4 12400 df-5 12401 df-6 12402 df-7 12403 df-8 12404 df-9 12405 df-n0 12600 df-z 12687 df-dec 12808 df-uz 12959 df-fz 13633 df-struct 17318 df-slot 17353 df-ndx 17365 df-base 17381 df-hom 17445 df-cco 17446 df-cat 17835 df-cid 17836 df-func 18026 df-nat 18114 df-fuc 18115 df-xpc 18339 df-1stf 18340 df-curf 18381 df-diag 18383 |
| This theorem is used by: diag1cl 18409 diag2cl 18413 diag1f1 50384 diag2f1 50386 prcofdiag 50471 oppfdiag1 50491 oppfdiag 50493 diagffth 50615 islmd 50742 iscmd 50743 lmddu 50744 initocmd 50746 lmdran 50748 |
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