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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 18460 | . 2 ⊢ (𝜑 → ((𝑋(2nd ‘𝐿)𝑌)‘𝐹) = (𝐵 × {𝐹})) |
| 11 | eqid 2763 | . . . . 5 ⊢ (𝐷 FuncCat 𝐶) = (𝐷 FuncCat 𝐶) | |
| 12 | diag2cl.h | . . . . 5 ⊢ 𝑁 = (𝐷 Nat 𝐶) | |
| 13 | 11, 12 | fuchom 18180 | . . . 4 ⊢ 𝑁 = (Hom ‘(𝐷 FuncCat 𝐶)) |
| 14 | relfunc 18078 | . . . . 5 ⊢ Rel (𝐶 Func (𝐷 FuncCat 𝐶)) | |
| 15 | 1, 5, 6, 11 | diagcl 18456 | . . . . 5 ⊢ (𝜑 → 𝐿 ∈ (𝐶 Func (𝐷 FuncCat 𝐶))) |
| 16 | 1st2ndbr 8085 | . . . . 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 599 | . . . 4 ⊢ (𝜑 → (1st ‘𝐿)(𝐶 Func (𝐷 FuncCat 𝐶))(2nd ‘𝐿)) |
| 18 | 2, 4, 13, 17, 7, 8 | funcf2 18084 | . . 3 ⊢ (𝜑 → (𝑋(2nd ‘𝐿)𝑌):(𝑋𝐻𝑌)⟶(((1st ‘𝐿)‘𝑋)𝑁((1st ‘𝐿)‘𝑌))) |
| 19 | 18, 9 | ffvelcdmd 7115 | . 2 ⊢ (𝜑 → ((𝑋(2nd ‘𝐿)𝑌)‘𝐹) ∈ (((1st ‘𝐿)‘𝑋)𝑁((1st ‘𝐿)‘𝑌))) |
| 20 | 10, 19 | eqeltrrd 2865 | 1 ⊢ (𝜑 → (𝐵 × {𝐹}) ∈ (((1st ‘𝐿)‘𝑋)𝑁((1st ‘𝐿)‘𝑌))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2147 {csn 4588 class class class wbr 5106 × cxp 5654 Rel wrel 5661 ‘cfv 6564 (class class class)co 7449 1st c1st 8031 2nd c2nd 8032 Basecbs 17428 Hom chom 17480 Catccat 17879 Func cfunc 18070 Nat cnat 18160 FuncCat cfuc 18161 Δfunccdiag 18427 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5236 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7781 ax-cnex 11293 ax-resscn 11294 ax-1cn 11295 ax-icn 11296 ax-addcl 11297 ax-addrcl 11298 ax-mulcl 11299 ax-mulrcl 11300 ax-mulcom 11301 ax-addass 11302 ax-mulass 11303 ax-distr 11304 ax-i2m1 11305 ax-1ne0 11306 ax-1rid 11307 ax-rnegex 11308 ax-rrecex 11309 ax-cnre 11310 ax-pre-lttri 11311 ax-pre-lttrn 11312 ax-pre-ltadd 11313 ax-pre-mulgt0 11314 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6328 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6518 df-fun 6566 df-fn 6567 df-f 6568 df-f1 6569 df-fo 6570 df-f1o 6571 df-fv 6572 df-riota 7406 df-ov 7452 df-oprab 7453 df-mpo 7454 df-om 7910 df-1st 8033 df-2nd 8034 df-frecs 8335 df-wrecs 8366 df-recs 8415 df-rdg 8454 df-1o 8512 df-er 8753 df-map 8885 df-ixp 8962 df-en 9010 df-dom 9011 df-sdom 9012 df-fin 9013 df-pnf 11382 df-mnf 11383 df-xr 11384 df-ltxr 11385 df-le 11386 df-sub 11580 df-neg 11581 df-nn 12374 df-2 12443 df-3 12444 df-4 12445 df-5 12446 df-6 12447 df-7 12448 df-8 12449 df-9 12450 df-n0 12645 df-z 12732 df-dec 12853 df-uz 13004 df-fz 13678 df-struct 17366 df-slot 17401 df-ndx 17413 df-base 17429 df-hom 17493 df-cco 17494 df-cat 17883 df-cid 17884 df-func 18074 df-nat 18162 df-fuc 18163 df-xpc 18387 df-1stf 18388 df-curf 18429 df-diag 18431 |
| This theorem is used by: prcofdiag 50854 oppfdiag 50876 par2diag 51105 islmd 51173 iscmd 51174 |
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