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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 0func | Structured version Visualization version GIF version | ||
| Description: The functor from the empty category. (Contributed by Zhi Wang, 7-Oct-2025.) (Proof shortened by Zhi Wang, 17-Oct-2025.) |
| Ref | Expression |
|---|---|
| 0func.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| Ref | Expression |
|---|---|
| 0func | ⊢ (𝜑 → (∅ Func 𝐶) = {〈∅, ∅〉}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0ex 5270 | . . 3 ⊢ ∅ ∈ V | |
| 2 | 1 | a1i 11 | . 2 ⊢ (𝜑 → ∅ ∈ V) |
| 3 | base0 17190 | . . 3 ⊢ ∅ = (Base‘∅) | |
| 4 | 3 | a1i 11 | . 2 ⊢ (𝜑 → ∅ = (Base‘∅)) |
| 5 | 0func.c | . 2 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 6 | 2, 4, 5 | 0funcg 49002 | 1 ⊢ (𝜑 → (∅ Func 𝐶) = {〈∅, ∅〉}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 Vcvv 3455 ∅c0 4304 {csn 4597 〈cop 4603 ‘cfv 6519 (class class class)co 7394 Basecbs 17185 Catccat 17631 Func cfunc 17822 |
| 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 2702 ax-rep 5242 ax-sep 5259 ax-nul 5269 ax-pow 5328 ax-pr 5395 ax-un 7718 ax-cnex 11142 ax-1cn 11144 ax-addcl 11146 |
| 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 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2880 df-ne 2928 df-ral 3047 df-rex 3056 df-reu 3358 df-rab 3412 df-v 3457 df-sbc 3762 df-csb 3871 df-dif 3925 df-un 3927 df-in 3929 df-ss 3939 df-pss 3942 df-nul 4305 df-if 4497 df-pw 4573 df-sn 4598 df-pr 4600 df-op 4604 df-uni 4880 df-iun 4965 df-br 5116 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5541 df-eprel 5546 df-po 5554 df-so 5555 df-fr 5599 df-we 5601 df-xp 5652 df-rel 5653 df-cnv 5654 df-co 5655 df-dm 5656 df-rn 5657 df-res 5658 df-ima 5659 df-pred 6282 df-ord 6343 df-on 6344 df-lim 6345 df-suc 6346 df-iota 6472 df-fun 6521 df-fn 6522 df-f 6523 df-f1 6524 df-fo 6525 df-f1o 6526 df-fv 6527 df-ov 7397 df-oprab 7398 df-mpo 7399 df-om 7851 df-1st 7977 df-2nd 7978 df-frecs 8269 df-wrecs 8300 df-recs 8349 df-rdg 8387 df-map 8805 df-ixp 8875 df-nn 12198 df-slot 17158 df-ndx 17170 df-base 17186 df-cat 17635 df-func 17826 |
| This theorem is referenced by: fucofvalne 49220 initocmd 49538 |
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