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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 49336 | . . 3 ⊢ (𝐹 ∈ (𝐻‘〈𝑋, 𝑌〉) → 𝐻 ≠ ∅) | |
| 3 | df-ov 7363 | . . 3 ⊢ (𝑋𝐻𝑌) = (𝐻‘〈𝑋, 𝑌〉) | |
| 4 | 2, 3 | eleq2s 2855 | . 2 ⊢ (𝐹 ∈ (𝑋𝐻𝑌) → 𝐻 ≠ ∅) |
| 5 | catcrcl.c | . . . . 5 ⊢ 𝐶 = (CatCat‘𝑈) | |
| 6 | fvprc 6826 | . . . . 5 ⊢ (¬ 𝑈 ∈ V → (CatCat‘𝑈) = ∅) | |
| 7 | 5, 6 | eqtrid 2784 | . . . 4 ⊢ (¬ 𝑈 ∈ V → 𝐶 = ∅) |
| 8 | fveq2 6834 | . . . . 5 ⊢ (𝐶 = ∅ → (Hom ‘𝐶) = (Hom ‘∅)) | |
| 9 | catcrcl.h | . . . . 5 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 10 | homid 17366 | . . . . . 6 ⊢ Hom = Slot (Hom ‘ndx) | |
| 11 | 10 | str0 17150 | . . . . 5 ⊢ ∅ = (Hom ‘∅) |
| 12 | 8, 9, 11 | 3eqtr4g 2797 | . . . 4 ⊢ (𝐶 = ∅ → 𝐻 = ∅) |
| 13 | 7, 12 | syl 17 | . . 3 ⊢ (¬ 𝑈 ∈ V → 𝐻 = ∅) |
| 14 | 13 | necon1ai 2960 | . 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 1542 ∈ wcel 2114 ≠ wne 2933 Vcvv 3430 ∅c0 4274 〈cop 4574 ‘cfv 6492 (class class class)co 7360 ndxcnx 17154 Hom chom 17222 CatCatccatc 18056 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7363 df-om 7811 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-ltxr 11175 df-nn 12166 df-2 12235 df-3 12236 df-4 12237 df-5 12238 df-6 12239 df-7 12240 df-8 12241 df-9 12242 df-n0 12429 df-dec 12636 df-slot 17143 df-ndx 17155 df-hom 17235 |
| This theorem is referenced by: catcrcl2 49883 elcatchom 49884 catcsect 49885 |
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