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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fucterm | Structured version Visualization version GIF version | ||
| Description: The category of functors to a terminal category is terminal. (Contributed by Zhi Wang, 17-Nov-2025.) |
| Ref | Expression |
|---|---|
| funcsn.q | ⊢ 𝑄 = (𝐶 FuncCat 𝐷) |
| fucterm.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| fucterm.d | ⊢ (𝜑 → 𝐷 ∈ TermCat) |
| Ref | Expression |
|---|---|
| fucterm | ⊢ (𝜑 → 𝑄 ∈ TermCat) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funcsn.q | . 2 ⊢ 𝑄 = (𝐶 FuncCat 𝐷) | |
| 2 | opex 5411 | . . 3 ⊢ 〈((Base‘𝐶) × (Base‘𝐷)), (𝑥 ∈ (Base‘𝐶), 𝑦 ∈ (Base‘𝐶) ↦ ((𝑥(Hom ‘𝐶)𝑦) × ((((Base‘𝐶) × (Base‘𝐷))‘𝑥)(Hom ‘𝐷)(((Base‘𝐶) × (Base‘𝐷))‘𝑦))))〉 ∈ V | |
| 3 | 2 | a1i 11 | . 2 ⊢ (𝜑 → 〈((Base‘𝐶) × (Base‘𝐷)), (𝑥 ∈ (Base‘𝐶), 𝑦 ∈ (Base‘𝐶) ↦ ((𝑥(Hom ‘𝐶)𝑦) × ((((Base‘𝐶) × (Base‘𝐷))‘𝑥)(Hom ‘𝐷)(((Base‘𝐶) × (Base‘𝐷))‘𝑦))))〉 ∈ V) |
| 4 | fucterm.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 5 | fucterm.d | . . 3 ⊢ (𝜑 → 𝐷 ∈ TermCat) | |
| 6 | eqid 2729 | . . 3 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 7 | eqid 2729 | . . 3 ⊢ (Base‘𝐷) = (Base‘𝐷) | |
| 8 | eqid 2729 | . . 3 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 9 | eqid 2729 | . . 3 ⊢ (Hom ‘𝐷) = (Hom ‘𝐷) | |
| 10 | eqid 2729 | . . 3 ⊢ ((Base‘𝐶) × (Base‘𝐷)) = ((Base‘𝐶) × (Base‘𝐷)) | |
| 11 | eqid 2729 | . . 3 ⊢ (𝑥 ∈ (Base‘𝐶), 𝑦 ∈ (Base‘𝐶) ↦ ((𝑥(Hom ‘𝐶)𝑦) × ((((Base‘𝐶) × (Base‘𝐷))‘𝑥)(Hom ‘𝐷)(((Base‘𝐶) × (Base‘𝐷))‘𝑦)))) = (𝑥 ∈ (Base‘𝐶), 𝑦 ∈ (Base‘𝐶) ↦ ((𝑥(Hom ‘𝐶)𝑦) × ((((Base‘𝐶) × (Base‘𝐷))‘𝑥)(Hom ‘𝐷)(((Base‘𝐶) × (Base‘𝐷))‘𝑦)))) | |
| 12 | 4, 5, 6, 7, 8, 9, 10, 11 | functermc2 49495 | . 2 ⊢ (𝜑 → (𝐶 Func 𝐷) = {〈((Base‘𝐶) × (Base‘𝐷)), (𝑥 ∈ (Base‘𝐶), 𝑦 ∈ (Base‘𝐶) ↦ ((𝑥(Hom ‘𝐶)𝑦) × ((((Base‘𝐶) × (Base‘𝐷))‘𝑥)(Hom ‘𝐷)(((Base‘𝐶) × (Base‘𝐷))‘𝑦))))〉}) |
| 13 | 5 | termcthind 49464 | . 2 ⊢ (𝜑 → 𝐷 ∈ ThinCat) |
| 14 | 1, 3, 12, 13 | funcsn 49527 | 1 ⊢ (𝜑 → 𝑄 ∈ TermCat) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 Vcvv 3438 〈cop 4585 × cxp 5621 ‘cfv 6486 (class class class)co 7353 ∈ cmpo 7355 Basecbs 17138 Hom chom 17190 Catccat 17588 FuncCat cfuc 17870 TermCatctermc 49458 |
| 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 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7675 ax-cnex 11084 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rnegex 11099 ax-rrecex 11100 ax-cnre 11101 ax-pre-lttri 11102 ax-pre-lttrn 11103 ax-pre-ltadd 11104 ax-pre-mulgt0 11105 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3345 df-reu 3346 df-rab 3397 df-v 3440 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-tp 4584 df-op 4586 df-uni 4862 df-iun 4946 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7310 df-ov 7356 df-oprab 7357 df-mpo 7358 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8632 df-map 8762 df-ixp 8832 df-en 8880 df-dom 8881 df-sdom 8882 df-fin 8883 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11367 df-neg 11368 df-nn 12147 df-2 12209 df-3 12210 df-4 12211 df-5 12212 df-6 12213 df-7 12214 df-8 12215 df-9 12216 df-n0 12403 df-z 12490 df-dec 12610 df-uz 12754 df-fz 13429 df-struct 17076 df-slot 17111 df-ndx 17123 df-base 17139 df-hom 17203 df-cco 17204 df-cat 17592 df-cid 17593 df-func 17783 df-nat 17871 df-fuc 17872 df-thinc 49404 df-termc 49459 |
| This theorem is referenced by: termfucterm 49530 cofuterm 49531 |
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