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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 5254 | . . 3 ⊢ ∅ ∈ V | |
| 2 | 1 | a1i 11 | . 2 ⊢ (𝜑 → ∅ ∈ V) |
| 3 | base0 17153 | . . 3 ⊢ ∅ = (Base‘∅) | |
| 4 | 3 | a1i 11 | . 2 ⊢ (𝜑 → ∅ = (Base‘∅)) |
| 5 | 0func.c | . 2 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 6 | 2, 4, 5 | 0funcg 49438 | 1 ⊢ (𝜑 → (∅ Func 𝐶) = {〈∅, ∅〉}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 Vcvv 3442 ∅c0 4287 {csn 4582 〈cop 4588 ‘cfv 6500 (class class class)co 7368 Basecbs 17148 Catccat 17599 Func cfunc 17790 |
| 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-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-cnex 11094 ax-1cn 11096 ax-addcl 11098 |
| 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-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-1st 7943 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-map 8777 df-ixp 8848 df-nn 12158 df-slot 17121 df-ndx 17133 df-base 17149 df-cat 17603 df-func 17794 |
| This theorem is referenced by: fucofvalne 49678 initocmd 50022 |
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