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| Mirrors > Home > MPE Home > Th. List > Mathboxes > funcsetc1ocl | Structured version Visualization version GIF version | ||
| Description: The functor to the trivial category. The converse is also true due to reverse closure. (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) |
| Ref | Expression |
|---|---|
| funcsetc1ocl | ⊢ (𝜑 → 𝐹 ∈ (𝐶 Func 1 )) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2765 | . 2 ⊢ ( 1 Δfunc𝐶) = ( 1 Δfunc𝐶) | |
| 2 | funcsetc1o.1 | . . . . 5 ⊢ 1 = (SetCat‘1o) | |
| 3 | setc1oterm 50302 | . . . . 5 ⊢ (SetCat‘1o) ∈ TermCat | |
| 4 | 2, 3 | eqeltri 2861 | . . . 4 ⊢ 1 ∈ TermCat |
| 5 | 4 | a1i 11 | . . 3 ⊢ (𝜑 → 1 ∈ TermCat) |
| 6 | 5 | termccd 50290 | . 2 ⊢ (𝜑 → 1 ∈ Cat) |
| 7 | funcsetc1o.c | . 2 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 8 | 2 | setc1obas 50303 | . 2 ⊢ 1o = (Base‘ 1 ) |
| 9 | 0lt1o 8491 | . . 3 ⊢ ∅ ∈ 1o | |
| 10 | 9 | a1i 11 | . 2 ⊢ (𝜑 → ∅ ∈ 1o) |
| 11 | funcsetc1o.f | . 2 ⊢ 𝐹 = ((1st ‘( 1 Δfunc𝐶))‘∅) | |
| 12 | 1, 6, 7, 8, 10, 11 | diag1cl 18316 | 1 ⊢ (𝜑 → 𝐹 ∈ (𝐶 Func 1 )) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 ∅c0 4286 ‘cfv 6540 (class class class)co 7416 1st c1st 7986 1oc1o 8448 Catccat 17738 Func cfunc 17929 SetCatcsetc 18150 Δfunccdiag 18286 TermCatctermc 50283 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 ax-cnex 11167 ax-resscn 11168 ax-1cn 11169 ax-icn 11170 ax-addcl 11171 ax-addrcl 11172 ax-mulcl 11173 ax-mulrcl 11174 ax-mulcom 11175 ax-addass 11176 ax-mulass 11177 ax-distr 11178 ax-i2m1 11179 ax-1ne0 11180 ax-1rid 11181 ax-rnegex 11182 ax-rrecex 11183 ax-cnre 11184 ax-pre-lttri 11185 ax-pre-lttrn 11186 ax-pre-ltadd 11187 ax-pre-mulgt0 11188 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-tp 4596 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7865 df-1st 7988 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-map 8828 df-ixp 8898 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-pnf 11256 df-mnf 11257 df-xr 11258 df-ltxr 11259 df-le 11260 df-sub 11454 df-neg 11455 df-nn 12245 df-2 12314 df-3 12315 df-4 12316 df-5 12317 df-6 12318 df-7 12319 df-8 12320 df-9 12321 df-n0 12516 df-z 12603 df-dec 12724 df-uz 12875 df-fz 13548 df-struct 17225 df-slot 17260 df-ndx 17272 df-base 17288 df-hom 17352 df-cco 17353 df-cat 17742 df-cid 17743 df-func 17933 df-nat 18021 df-fuc 18022 df-setc 18151 df-xpc 18246 df-1stf 18247 df-curf 18288 df-diag 18290 df-thinc 50229 df-termc 50284 |
| This theorem is used by: isinito2lem 50309 isinito4 50358 |
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