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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 4858 | . . 3 ⊢ 〈∅, ∅, 1o〉 = 〈〈∅, ∅〉, 1o〉 | |
| 2 | 1 | sneqi 4591 | . 2 ⊢ {〈∅, ∅, 1o〉} = {〈〈∅, ∅〉, 1o〉} |
| 3 | 0ex 5260 | . . 3 ⊢ ∅ ∈ V | |
| 4 | 1oex 8491 | . . 3 ⊢ 1o ∈ V | |
| 5 | funcsetc1o.1 | . . . . . . 7 ⊢ 1 = (SetCat‘1o) | |
| 6 | df1o2 8488 | . . . . . . . 8 ⊢ 1o = {∅} | |
| 7 | 6 | fveq2i 6891 | . . . . . . 7 ⊢ (SetCat‘1o) = (SetCat‘{∅}) |
| 8 | 5, 7 | eqtri 2783 | . . . . . 6 ⊢ 1 = (SetCat‘{∅}) |
| 9 | p0ex 5345 | . . . . . . 7 ⊢ {∅} ∈ V | |
| 10 | 9 | a1i 11 | . . . . . 6 ⊢ (⊤ → {∅} ∈ V) |
| 11 | eqid 2760 | . . . . . 6 ⊢ (Hom ‘ 1 ) = (Hom ‘ 1 ) | |
| 12 | 8, 10, 11 | setchomfval 18261 | . . . . 5 ⊢ (⊤ → (Hom ‘ 1 ) = (𝑥 ∈ {∅}, 𝑦 ∈ {∅} ↦ (𝑦 ↑m 𝑥))) |
| 13 | 12 | mptru 1576 | . . . 4 ⊢ (Hom ‘ 1 ) = (𝑥 ∈ {∅}, 𝑦 ∈ {∅} ↦ (𝑦 ↑m 𝑥)) |
| 14 | oveq2 7430 | . . . 4 ⊢ (𝑥 = ∅ → (𝑦 ↑m 𝑥) = (𝑦 ↑m ∅)) | |
| 15 | oveq1 7429 | . . . . 5 ⊢ (𝑦 = ∅ → (𝑦 ↑m ∅) = (∅ ↑m ∅)) | |
| 16 | 0map0sn0 8918 | . . . . . 6 ⊢ (∅ ↑m ∅) = {∅} | |
| 17 | 16, 6 | eqtr4i 2786 | . . . . 5 ⊢ (∅ ↑m ∅) = 1o |
| 18 | 15, 17 | eqtrdi 2811 | . . . 4 ⊢ (𝑦 = ∅ → (𝑦 ↑m ∅) = 1o) |
| 19 | 13, 14, 18 | mposn 8118 | . . 3 ⊢ ((∅ ∈ V ∧ ∅ ∈ V ∧ 1o ∈ V) → (Hom ‘ 1 ) = {〈〈∅, ∅〉, 1o〉}) |
| 20 | 3, 3, 4, 19 | mp3an 1490 | . 2 ⊢ (Hom ‘ 1 ) = {〈〈∅, ∅〉, 1o〉} |
| 21 | 2, 20 | eqtr4i 2786 | 1 ⊢ {〈∅, ∅, 1o〉} = (Hom ‘ 1 ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 ⊤wtru 1570 ∈ wcel 2144 Vcvv 3450 ∅c0 4277 {csn 4584 〈cop 4834 〈cotp 4857 ‘cfv 6541 (class class class)co 7422 ∈ cmpo 7424 1oc1o 8474 ↑m cmap 8852 Hom chom 17446 SetCatcsetc 18257 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7753 ax-cnex 11261 ax-resscn 11262 ax-1cn 11263 ax-icn 11264 ax-addcl 11265 ax-addrcl 11266 ax-mulcl 11267 ax-mulrcl 11268 ax-mulcom 11269 ax-addass 11270 ax-mulass 11271 ax-distr 11272 ax-i2m1 11273 ax-1ne0 11274 ax-1rid 11275 ax-rnegex 11276 ax-rrecex 11277 ax-cnre 11278 ax-pre-lttri 11279 ax-pre-lttrn 11280 ax-pre-ltadd 11281 ax-pre-mulgt0 11282 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4835 df-ot 4858 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-riota 7379 df-ov 7425 df-oprab 7426 df-mpo 7427 df-om 7880 df-1st 8003 df-2nd 8004 df-frecs 8304 df-wrecs 8335 df-recs 8384 df-rdg 8423 df-1o 8481 df-er 8722 df-map 8854 df-en 8979 df-dom 8980 df-sdom 8981 df-fin 8982 df-pnf 11350 df-mnf 11351 df-xr 11352 df-ltxr 11353 df-le 11354 df-sub 11548 df-neg 11549 df-nn 12341 df-2 12410 df-3 12411 df-4 12412 df-5 12413 df-6 12414 df-7 12415 df-8 12416 df-9 12417 df-n0 12612 df-z 12699 df-dec 12820 df-uz 12971 df-fz 13645 df-struct 17332 df-slot 17367 df-ndx 17379 df-base 17395 df-hom 17459 df-cco 17460 df-setc 18258 |
| This theorem is used by: isinito2lem 50740 isinito3 50742 setc1onsubc 50847 |
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