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Mirrors > Home > MPE Home > Th. List > diag2cl | Structured version Visualization version GIF version |
Description: The diagonal functor at a morphism is a natural transformation between constant functors. (Contributed by Mario Carneiro, 7-Jan-2017.) |
Ref | Expression |
---|---|
diag2.l | ⊢ 𝐿 = (𝐶Δfunc𝐷) |
diag2.a | ⊢ 𝐴 = (Base‘𝐶) |
diag2.b | ⊢ 𝐵 = (Base‘𝐷) |
diag2.h | ⊢ 𝐻 = (Hom ‘𝐶) |
diag2.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
diag2.d | ⊢ (𝜑 → 𝐷 ∈ Cat) |
diag2.x | ⊢ (𝜑 → 𝑋 ∈ 𝐴) |
diag2.y | ⊢ (𝜑 → 𝑌 ∈ 𝐴) |
diag2.f | ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) |
diag2cl.h | ⊢ 𝑁 = (𝐷 Nat 𝐶) |
Ref | Expression |
---|---|
diag2cl | ⊢ (𝜑 → (𝐵 × {𝐹}) ∈ (((1st ‘𝐿)‘𝑋)𝑁((1st ‘𝐿)‘𝑌))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | diag2.l | . . 3 ⊢ 𝐿 = (𝐶Δfunc𝐷) | |
2 | diag2.a | . . 3 ⊢ 𝐴 = (Base‘𝐶) | |
3 | diag2.b | . . 3 ⊢ 𝐵 = (Base‘𝐷) | |
4 | diag2.h | . . 3 ⊢ 𝐻 = (Hom ‘𝐶) | |
5 | diag2.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
6 | diag2.d | . . 3 ⊢ (𝜑 → 𝐷 ∈ Cat) | |
7 | diag2.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐴) | |
8 | diag2.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐴) | |
9 | diag2.f | . . 3 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) | |
10 | 1, 2, 3, 4, 5, 6, 7, 8, 9 | diag2 18197 | . 2 ⊢ (𝜑 → ((𝑋(2nd ‘𝐿)𝑌)‘𝐹) = (𝐵 × {𝐹})) |
11 | eqid 2732 | . . . . 5 ⊢ (𝐷 FuncCat 𝐶) = (𝐷 FuncCat 𝐶) | |
12 | diag2cl.h | . . . . 5 ⊢ 𝑁 = (𝐷 Nat 𝐶) | |
13 | 11, 12 | fuchom 17912 | . . . 4 ⊢ 𝑁 = (Hom ‘(𝐷 FuncCat 𝐶)) |
14 | relfunc 17811 | . . . . 5 ⊢ Rel (𝐶 Func (𝐷 FuncCat 𝐶)) | |
15 | 1, 5, 6, 11 | diagcl 18193 | . . . . 5 ⊢ (𝜑 → 𝐿 ∈ (𝐶 Func (𝐷 FuncCat 𝐶))) |
16 | 1st2ndbr 8027 | . . . . 5 ⊢ ((Rel (𝐶 Func (𝐷 FuncCat 𝐶)) ∧ 𝐿 ∈ (𝐶 Func (𝐷 FuncCat 𝐶))) → (1st ‘𝐿)(𝐶 Func (𝐷 FuncCat 𝐶))(2nd ‘𝐿)) | |
17 | 14, 15, 16 | sylancr 587 | . . . 4 ⊢ (𝜑 → (1st ‘𝐿)(𝐶 Func (𝐷 FuncCat 𝐶))(2nd ‘𝐿)) |
18 | 2, 4, 13, 17, 7, 8 | funcf2 17817 | . . 3 ⊢ (𝜑 → (𝑋(2nd ‘𝐿)𝑌):(𝑋𝐻𝑌)⟶(((1st ‘𝐿)‘𝑋)𝑁((1st ‘𝐿)‘𝑌))) |
19 | 18, 9 | ffvelcdmd 7087 | . 2 ⊢ (𝜑 → ((𝑋(2nd ‘𝐿)𝑌)‘𝐹) ∈ (((1st ‘𝐿)‘𝑋)𝑁((1st ‘𝐿)‘𝑌))) |
20 | 10, 19 | eqeltrrd 2834 | 1 ⊢ (𝜑 → (𝐵 × {𝐹}) ∈ (((1st ‘𝐿)‘𝑋)𝑁((1st ‘𝐿)‘𝑌))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2106 {csn 4628 class class class wbr 5148 × cxp 5674 Rel wrel 5681 ‘cfv 6543 (class class class)co 7408 1st c1st 7972 2nd c2nd 7973 Basecbs 17143 Hom chom 17207 Catccat 17607 Func cfunc 17803 Nat cnat 17891 FuncCat cfuc 17892 Δfunccdiag 18164 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7724 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7364 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7855 df-1st 7974 df-2nd 7975 df-frecs 8265 df-wrecs 8296 df-recs 8370 df-rdg 8409 df-1o 8465 df-er 8702 df-map 8821 df-ixp 8891 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11445 df-neg 11446 df-nn 12212 df-2 12274 df-3 12275 df-4 12276 df-5 12277 df-6 12278 df-7 12279 df-8 12280 df-9 12281 df-n0 12472 df-z 12558 df-dec 12677 df-uz 12822 df-fz 13484 df-struct 17079 df-slot 17114 df-ndx 17126 df-base 17144 df-hom 17220 df-cco 17221 df-cat 17611 df-cid 17612 df-func 17807 df-nat 17893 df-fuc 17894 df-xpc 18123 df-1stf 18124 df-curf 18166 df-diag 18168 |
This theorem is referenced by: (None) |
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