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| Mirrors > Home > MPE Home > Th. List > Mathboxes > catcrcl | Structured version Visualization version GIF version | ||
| Description: Reverse closure for the category of categories (in a universe) (Contributed by Zhi Wang, 14-Nov-2025.) |
| Ref | Expression |
|---|---|
| catcrcl.c | ⊢ 𝐶 = (CatCat‘𝑈) |
| catcrcl.h | ⊢ 𝐻 = (Hom ‘𝐶) |
| catcrcl.f | ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) |
| Ref | Expression |
|---|---|
| catcrcl | ⊢ (𝜑 → 𝑈 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | catcrcl.f | . 2 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) | |
| 2 | elfvne0 48973 | . . 3 ⊢ (𝐹 ∈ (𝐻‘〈𝑋, 𝑌〉) → 𝐻 ≠ ∅) | |
| 3 | df-ov 7355 | . . 3 ⊢ (𝑋𝐻𝑌) = (𝐻‘〈𝑋, 𝑌〉) | |
| 4 | 2, 3 | eleq2s 2851 | . 2 ⊢ (𝐹 ∈ (𝑋𝐻𝑌) → 𝐻 ≠ ∅) |
| 5 | catcrcl.c | . . . . 5 ⊢ 𝐶 = (CatCat‘𝑈) | |
| 6 | fvprc 6820 | . . . . 5 ⊢ (¬ 𝑈 ∈ V → (CatCat‘𝑈) = ∅) | |
| 7 | 5, 6 | eqtrid 2780 | . . . 4 ⊢ (¬ 𝑈 ∈ V → 𝐶 = ∅) |
| 8 | fveq2 6828 | . . . . 5 ⊢ (𝐶 = ∅ → (Hom ‘𝐶) = (Hom ‘∅)) | |
| 9 | catcrcl.h | . . . . 5 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 10 | homid 17318 | . . . . . 6 ⊢ Hom = Slot (Hom ‘ndx) | |
| 11 | 10 | str0 17102 | . . . . 5 ⊢ ∅ = (Hom ‘∅) |
| 12 | 8, 9, 11 | 3eqtr4g 2793 | . . . 4 ⊢ (𝐶 = ∅ → 𝐻 = ∅) |
| 13 | 7, 12 | syl 17 | . . 3 ⊢ (¬ 𝑈 ∈ V → 𝐻 = ∅) |
| 14 | 13 | necon1ai 2956 | . 2 ⊢ (𝐻 ≠ ∅ → 𝑈 ∈ V) |
| 15 | 1, 4, 14 | 3syl 18 | 1 ⊢ (𝜑 → 𝑈 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 = wceq 1541 ∈ wcel 2113 ≠ wne 2929 Vcvv 3437 ∅c0 4282 〈cop 4581 ‘cfv 6486 (class class class)co 7352 ndxcnx 17106 Hom chom 17174 CatCatccatc 18007 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 ax-cnex 11069 ax-resscn 11070 ax-1cn 11071 ax-icn 11072 ax-addcl 11073 ax-addrcl 11074 ax-mulcl 11075 ax-mulrcl 11076 ax-mulcom 11077 ax-addass 11078 ax-mulass 11079 ax-distr 11080 ax-i2m1 11081 ax-1ne0 11082 ax-1rid 11083 ax-rnegex 11084 ax-rrecex 11085 ax-cnre 11086 ax-pre-lttri 11087 ax-pre-lttrn 11088 ax-pre-ltadd 11089 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-iun 4943 df-br 5094 df-opab 5156 df-mpt 5175 df-tr 5201 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 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-ov 7355 df-om 7803 df-2nd 7928 df-frecs 8217 df-wrecs 8248 df-recs 8297 df-rdg 8335 df-er 8628 df-en 8876 df-dom 8877 df-sdom 8878 df-pnf 11155 df-mnf 11156 df-ltxr 11158 df-nn 12133 df-2 12195 df-3 12196 df-4 12197 df-5 12198 df-6 12199 df-7 12200 df-8 12201 df-9 12202 df-n0 12389 df-dec 12595 df-slot 17095 df-ndx 17107 df-hom 17187 |
| This theorem is referenced by: catcrcl2 49521 elcatchom 49522 catcsect 49523 |
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