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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 49434 | . . 3 ⊢ (𝐹 ∈ (𝐻‘〈𝑋, 𝑌〉) → 𝐻 ≠ ∅) | |
| 3 | df-ov 7395 | . . 3 ⊢ (𝑋𝐻𝑌) = (𝐻‘〈𝑋, 𝑌〉) | |
| 4 | 2, 3 | eleq2s 2879 | . 2 ⊢ (𝐹 ∈ (𝑋𝐻𝑌) → 𝐻 ≠ ∅) |
| 5 | catcrcl.c | . . . . 5 ⊢ 𝐶 = (CatCat‘𝑈) | |
| 6 | fvprc 6855 | . . . . 5 ⊢ (¬ 𝑈 ∈ V → (CatCat‘𝑈) = ∅) | |
| 7 | 5, 6 | eqtrid 2808 | . . . 4 ⊢ (¬ 𝑈 ∈ V → 𝐶 = ∅) |
| 8 | fveq2 6863 | . . . . 5 ⊢ (𝐶 = ∅ → (Hom ‘𝐶) = (Hom ‘∅)) | |
| 9 | catcrcl.h | . . . . 5 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 10 | homid 17424 | . . . . . 6 ⊢ Hom = Slot (Hom ‘ndx) | |
| 11 | 10 | str0 17208 | . . . . 5 ⊢ ∅ = (Hom ‘∅) |
| 12 | 8, 9, 11 | 3eqtr4g 2821 | . . . 4 ⊢ (𝐶 = ∅ → 𝐻 = ∅) |
| 13 | 7, 12 | syl 17 | . . 3 ⊢ (¬ 𝑈 ∈ V → 𝐻 = ∅) |
| 14 | 13 | necon1ai 2983 | . 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 1559 ∈ wcel 2141 ≠ wne 2956 Vcvv 3453 ∅c0 4285 〈cop 4587 ‘cfv 6517 (class class class)co 7392 ndxcnx 17212 Hom chom 17280 CatCatccatc 18114 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5245 ax-nul 5255 ax-pow 5321 ax-pr 5389 ax-un 7714 ax-cnex 11126 ax-resscn 11127 ax-1cn 11128 ax-icn 11129 ax-addcl 11130 ax-addrcl 11131 ax-mulcl 11132 ax-mulrcl 11133 ax-mulcom 11134 ax-addass 11135 ax-mulass 11136 ax-distr 11137 ax-i2m1 11138 ax-1ne0 11139 ax-1rid 11140 ax-rnegex 11141 ax-rrecex 11142 ax-cnre 11143 ax-pre-lttri 11144 ax-pre-lttrn 11145 ax-pre-ltadd 11146 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5540 df-eprel 5545 df-po 5553 df-so 5554 df-fr 5598 df-we 5600 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-pred 6284 df-ord 6345 df-on 6346 df-lim 6347 df-suc 6348 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-ov 7395 df-om 7843 df-2nd 7967 df-frecs 8257 df-wrecs 8288 df-recs 8337 df-rdg 8376 df-er 8673 df-en 8924 df-dom 8925 df-sdom 8926 df-pnf 11215 df-mnf 11216 df-ltxr 11218 df-nn 12208 df-2 12277 df-3 12278 df-4 12279 df-5 12280 df-6 12281 df-7 12282 df-8 12283 df-9 12284 df-n0 12479 df-dec 12686 df-slot 17201 df-ndx 17213 df-hom 17293 |
| This theorem is referenced by: catcrcl2 49981 elcatchom 49982 catcsect 49983 |
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