| Mathbox for Zhi Wang |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > funcsetc1o | Structured version Visualization version GIF version | ||
| Description: Value of the functor to the trivial category. The converse is also true because 𝐹 would be the empty set if 𝐶 were not a category; and the empty set cannot equal an ordered pair of two sets. (Contributed by Zhi Wang, 22-Oct-2025.) |
| Ref | Expression |
|---|---|
| funcsetc1o.1 | ⊢ 1 = (SetCat‘1o) |
| funcsetc1o.f | ⊢ 𝐹 = ((1st ‘( 1 Δfunc𝐶))‘∅) |
| funcsetc1o.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| funcsetc1o.b | ⊢ 𝐵 = (Base‘𝐶) |
| funcsetc1o.h | ⊢ 𝐻 = (Hom ‘𝐶) |
| Ref | Expression |
|---|---|
| funcsetc1o | ⊢ (𝜑 → 𝐹 = 〈(𝐵 × 1o), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ((𝑥𝐻𝑦) × 1o))〉) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2739 | . . 3 ⊢ ( 1 Δfunc𝐶) = ( 1 Δfunc𝐶) | |
| 2 | funcsetc1o.1 | . . . . . 6 ⊢ 1 = (SetCat‘1o) | |
| 3 | setc1oterm 49981 | . . . . . 6 ⊢ (SetCat‘1o) ∈ TermCat | |
| 4 | 2, 3 | eqeltri 2835 | . . . . 5 ⊢ 1 ∈ TermCat |
| 5 | 4 | a1i 11 | . . . 4 ⊢ (𝜑 → 1 ∈ TermCat) |
| 6 | 5 | termccd 49969 | . . 3 ⊢ (𝜑 → 1 ∈ Cat) |
| 7 | funcsetc1o.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 8 | 2 | setc1obas 49982 | . . 3 ⊢ 1o = (Base‘ 1 ) |
| 9 | 0lt1o 8429 | . . . 4 ⊢ ∅ ∈ 1o | |
| 10 | 9 | a1i 11 | . . 3 ⊢ (𝜑 → ∅ ∈ 1o) |
| 11 | funcsetc1o.f | . . 3 ⊢ 𝐹 = ((1st ‘( 1 Δfunc𝐶))‘∅) | |
| 12 | funcsetc1o.b | . . 3 ⊢ 𝐵 = (Base‘𝐶) | |
| 13 | funcsetc1o.h | . . 3 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 14 | eqid 2739 | . . 3 ⊢ (Id‘ 1 ) = (Id‘ 1 ) | |
| 15 | 1, 6, 7, 8, 10, 11, 12, 13, 14 | diag1a 49795 | . 2 ⊢ (𝜑 → 𝐹 = 〈(𝐵 × {∅}), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ((𝑥𝐻𝑦) × {((Id‘ 1 )‘∅)}))〉) |
| 16 | df1o2 8402 | . . . 4 ⊢ 1o = {∅} | |
| 17 | 16 | xpeq2i 5645 | . . 3 ⊢ (𝐵 × 1o) = (𝐵 × {∅}) |
| 18 | 2, 14 | setc1oid 49985 | . . . . . . . 8 ⊢ ((Id‘ 1 )‘∅) = ∅ |
| 19 | 18 | sneqi 4566 | . . . . . . 7 ⊢ {((Id‘ 1 )‘∅)} = {∅} |
| 20 | 16, 19 | eqtr4i 2765 | . . . . . 6 ⊢ 1o = {((Id‘ 1 )‘∅)} |
| 21 | 20 | xpeq2i 5645 | . . . . 5 ⊢ ((𝑥𝐻𝑦) × 1o) = ((𝑥𝐻𝑦) × {((Id‘ 1 )‘∅)}) |
| 22 | 21 | a1i 11 | . . . 4 ⊢ ((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → ((𝑥𝐻𝑦) × 1o) = ((𝑥𝐻𝑦) × {((Id‘ 1 )‘∅)})) |
| 23 | 22 | mpoeq3ia 7434 | . . 3 ⊢ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ((𝑥𝐻𝑦) × 1o)) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ((𝑥𝐻𝑦) × {((Id‘ 1 )‘∅)})) |
| 24 | 17, 23 | opeq12i 4809 | . 2 ⊢ 〈(𝐵 × 1o), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ((𝑥𝐻𝑦) × 1o))〉 = 〈(𝐵 × {∅}), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ((𝑥𝐻𝑦) × {((Id‘ 1 )‘∅)}))〉 |
| 25 | 15, 24 | eqtr4di 2792 | 1 ⊢ (𝜑 → 𝐹 = 〈(𝐵 × 1o), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ((𝑥𝐻𝑦) × 1o))〉) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ∈ wcel 2119 ∅c0 4261 {csn 4555 〈cop 4561 × cxp 5616 ‘cfv 6485 (class class class)co 7356 ∈ cmpo 7358 1st c1st 7929 1oc1o 8388 Basecbs 17170 Hom chom 17222 Catccat 17621 Idccid 17622 SetCatcsetc 18033 Δfunccdiag 18169 TermCatctermc 49962 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5199 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 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 ax-pre-mulgt0 11106 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rmo 3344 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-tp 4560 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-tr 5180 df-id 5513 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-pred 6252 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8633 df-map 8765 df-ixp 8836 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 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-z 12516 df-dec 12636 df-uz 12780 df-fz 13453 df-struct 17108 df-slot 17143 df-ndx 17155 df-base 17171 df-hom 17235 df-cco 17236 df-cat 17625 df-cid 17626 df-func 17816 df-nat 17904 df-fuc 17905 df-setc 18034 df-xpc 18129 df-1stf 18130 df-curf 18171 df-diag 18173 df-thinc 49908 df-termc 49963 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |