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| Mirrors > Home > MPE Home > Th. List > Mathboxes > setc1ohomfval | Structured version Visualization version GIF version | ||
| Description: Set of morphisms of the trivial category. (Contributed by Zhi Wang, 22-Oct-2025.) |
| Ref | Expression |
|---|---|
| funcsetc1o.1 | ⊢ 1 = (SetCat‘1o) |
| Ref | Expression |
|---|---|
| setc1ohomfval | ⊢ {〈∅, ∅, 1o〉} = (Hom ‘ 1 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ot 4598 | . . 3 ⊢ 〈∅, ∅, 1o〉 = 〈〈∅, ∅〉, 1o〉 | |
| 2 | 1 | sneqi 4600 | . 2 ⊢ {〈∅, ∅, 1o〉} = {〈〈∅, ∅〉, 1o〉} |
| 3 | 0ex 5270 | . . 3 ⊢ ∅ ∈ V | |
| 4 | 1oex 8459 | . . 3 ⊢ 1o ∈ V | |
| 5 | funcsetc1o.1 | . . . . . . 7 ⊢ 1 = (SetCat‘1o) | |
| 6 | df1o2 8456 | . . . . . . . 8 ⊢ 1o = {∅} | |
| 7 | 6 | fveq2i 6884 | . . . . . . 7 ⊢ (SetCat‘1o) = (SetCat‘{∅}) |
| 8 | 5, 7 | eqtri 2786 | . . . . . 6 ⊢ 1 = (SetCat‘{∅}) |
| 9 | p0ex 5355 | . . . . . . 7 ⊢ {∅} ∈ V | |
| 10 | 9 | a1i 11 | . . . . . 6 ⊢ (⊤ → {∅} ∈ V) |
| 11 | eqid 2763 | . . . . . 6 ⊢ (Hom ‘ 1 ) = (Hom ‘ 1 ) | |
| 12 | 8, 10, 11 | setchomfval 18131 | . . . . 5 ⊢ (⊤ → (Hom ‘ 1 ) = (𝑥 ∈ {∅}, 𝑦 ∈ {∅} ↦ (𝑦 ↑m 𝑥))) |
| 13 | 12 | mptru 1577 | . . . 4 ⊢ (Hom ‘ 1 ) = (𝑥 ∈ {∅}, 𝑦 ∈ {∅} ↦ (𝑦 ↑m 𝑥)) |
| 14 | oveq2 7418 | . . . 4 ⊢ (𝑥 = ∅ → (𝑦 ↑m 𝑥) = (𝑦 ↑m ∅)) | |
| 15 | oveq1 7417 | . . . . 5 ⊢ (𝑦 = ∅ → (𝑦 ↑m ∅) = (∅ ↑m ∅)) | |
| 16 | 0map0sn0 8879 | . . . . . 6 ⊢ (∅ ↑m ∅) = {∅} | |
| 17 | 16, 6 | eqtr4i 2789 | . . . . 5 ⊢ (∅ ↑m ∅) = 1o |
| 18 | 15, 17 | eqtrdi 2814 | . . . 4 ⊢ (𝑦 = ∅ → (𝑦 ↑m ∅) = 1o) |
| 19 | 13, 14, 18 | mposn 8094 | . . 3 ⊢ ((∅ ∈ V ∧ ∅ ∈ V ∧ 1o ∈ V) → (Hom ‘ 1 ) = {〈〈∅, ∅〉, 1o〉}) |
| 20 | 3, 3, 4, 19 | mp3an 1490 | . 2 ⊢ (Hom ‘ 1 ) = {〈〈∅, ∅〉, 1o〉} |
| 21 | 2, 20 | eqtr4i 2789 | 1 ⊢ {〈∅, ∅, 1o〉} = (Hom ‘ 1 ) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1570 ⊤wtru 1571 ∈ wcel 2143 Vcvv 3455 ∅c0 4286 {csn 4589 〈cop 4595 〈cotp 4597 ‘cfv 6536 (class class class)co 7410 ∈ cmpo 7412 1oc1o 8442 ↑m cmap 8820 Hom chom 17316 SetCatcsetc 18127 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-ot 4598 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-er 8690 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-nn 12229 df-2 12298 df-3 12299 df-4 12300 df-5 12301 df-6 12302 df-7 12303 df-8 12304 df-9 12305 df-n0 12500 df-z 12587 df-dec 12707 df-uz 12858 df-fz 13531 df-struct 17202 df-slot 17237 df-ndx 17249 df-base 17265 df-hom 17329 df-cco 17330 df-setc 18128 |
| This theorem is referenced by: isinito2lem 50276 isinito3 50278 setc1onsubc 50380 |
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