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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 4593 | . . 3 ⊢ 〈∅, ∅, 1o〉 = 〈〈∅, ∅〉, 1o〉 | |
| 2 | 1 | sneqi 4595 | . 2 ⊢ {〈∅, ∅, 1o〉} = {〈〈∅, ∅〉, 1o〉} |
| 3 | 0ex 5264 | . . 3 ⊢ ∅ ∈ V | |
| 4 | 1oex 8465 | . . 3 ⊢ 1o ∈ V | |
| 5 | funcsetc1o.1 | . . . . . . 7 ⊢ 1 = (SetCat‘1o) | |
| 6 | df1o2 8462 | . . . . . . . 8 ⊢ 1o = {∅} | |
| 7 | 6 | fveq2i 6881 | . . . . . . 7 ⊢ (SetCat‘1o) = (SetCat‘{∅}) |
| 8 | 5, 7 | eqtri 2783 | . . . . . 6 ⊢ 1 = (SetCat‘{∅}) |
| 9 | p0ex 5349 | . . . . . . 7 ⊢ {∅} ∈ V | |
| 10 | 9 | a1i 11 | . . . . . 6 ⊢ (⊤ → {∅} ∈ V) |
| 11 | eqid 2760 | . . . . . 6 ⊢ (Hom ‘ 1 ) = (Hom ‘ 1 ) | |
| 12 | 8, 10, 11 | setchomfval 18168 | . . . . 5 ⊢ (⊤ → (Hom ‘ 1 ) = (𝑥 ∈ {∅}, 𝑦 ∈ {∅} ↦ (𝑦 ↑m 𝑥))) |
| 13 | 12 | mptru 1577 | . . . 4 ⊢ (Hom ‘ 1 ) = (𝑥 ∈ {∅}, 𝑦 ∈ {∅} ↦ (𝑦 ↑m 𝑥)) |
| 14 | oveq2 7421 | . . . 4 ⊢ (𝑥 = ∅ → (𝑦 ↑m 𝑥) = (𝑦 ↑m ∅)) | |
| 15 | oveq1 7420 | . . . . 5 ⊢ (𝑦 = ∅ → (𝑦 ↑m ∅) = (∅ ↑m ∅)) | |
| 16 | 0map0sn0 8892 | . . . . . 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 8100 | . . 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 1570 ⊤wtru 1571 ∈ wcel 2145 Vcvv 3450 ∅c0 4279 {csn 4584 〈cop 4590 〈cotp 4592 ‘cfv 6533 (class class class)co 7413 ∈ cmpo 7415 1oc1o 8448 ↑m cmap 8826 Hom chom 17353 SetCatcsetc 18164 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 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 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-ot 4593 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-map 8828 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-sub 11467 df-neg 11468 df-nn 12258 df-2 12327 df-3 12328 df-4 12329 df-5 12330 df-6 12331 df-7 12332 df-8 12333 df-9 12334 df-n0 12529 df-z 12616 df-dec 12737 df-uz 12888 df-fz 13562 df-struct 17239 df-slot 17274 df-ndx 17286 df-base 17302 df-hom 17366 df-cco 17367 df-setc 18165 |
| This theorem is used by: isinito2lem 50424 isinito3 50426 setc1onsubc 50528 |
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