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| Mirrors > Home > MPE Home > Th. List > Mathboxes > termfucterm | Structured version Visualization version GIF version | ||
| Description: All functors between two terminal categories are isomorphisms. (Contributed by Zhi Wang, 17-Nov-2025.) |
| Ref | Expression |
|---|---|
| termfucterm.c | ⊢ 𝐶 = (CatCat‘𝑈) |
| termfucterm.b | ⊢ 𝐵 = (Base‘𝐶) |
| termfucterm.i | ⊢ 𝐼 = (Iso‘𝐶) |
| termfucterm.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| termfucterm.xt | ⊢ (𝜑 → 𝑋 ∈ TermCat) |
| termfucterm.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| termfucterm.yt | ⊢ (𝜑 → 𝑌 ∈ TermCat) |
| Ref | Expression |
|---|---|
| termfucterm | ⊢ (𝜑 → (𝑋 Func 𝑌) = (𝑋𝐼𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | termfucterm.yt | . . . . . . 7 ⊢ (𝜑 → 𝑌 ∈ TermCat) | |
| 2 | termfucterm.c | . . . . . . . 8 ⊢ 𝐶 = (CatCat‘𝑈) | |
| 3 | termfucterm.b | . . . . . . . 8 ⊢ 𝐵 = (Base‘𝐶) | |
| 4 | termfucterm.x | . . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | termfucterm.y | . . . . . . . 8 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 6 | termfucterm.xt | . . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ TermCat) | |
| 7 | 2, 3, 4, 5, 6 | termcciso 50450 | . . . . . . 7 ⊢ (𝜑 → (𝑌 ∈ TermCat ↔ 𝑋( ≃𝑐 ‘𝐶)𝑌)) |
| 8 | 1, 7 | mpbid 235 | . . . . . 6 ⊢ (𝜑 → 𝑋( ≃𝑐 ‘𝐶)𝑌) |
| 9 | termfucterm.i | . . . . . . 7 ⊢ 𝐼 = (Iso‘𝐶) | |
| 10 | cicrcl2 49977 | . . . . . . . 8 ⊢ (𝑋( ≃𝑐 ‘𝐶)𝑌 → 𝐶 ∈ Cat) | |
| 11 | 8, 10 | syl 18 | . . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 12 | 9, 3, 11, 4, 5 | cic 17894 | . . . . . 6 ⊢ (𝜑 → (𝑋( ≃𝑐 ‘𝐶)𝑌 ↔ ∃𝑔 𝑔 ∈ (𝑋𝐼𝑌))) |
| 13 | 8, 12 | mpbid 235 | . . . . 5 ⊢ (𝜑 → ∃𝑔 𝑔 ∈ (𝑋𝐼𝑌)) |
| 14 | 13 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) → ∃𝑔 𝑔 ∈ (𝑋𝐼𝑌)) |
| 15 | eqid 2762 | . . . . . . . 8 ⊢ (𝑋 FuncCat 𝑌) = (𝑋 FuncCat 𝑌) | |
| 16 | 6 | termccd 50413 | . . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ Cat) |
| 17 | 15, 16, 1 | fucterm 50476 | . . . . . . 7 ⊢ (𝜑 → (𝑋 FuncCat 𝑌) ∈ TermCat) |
| 18 | 17 | ad2antrr 739 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → (𝑋 FuncCat 𝑌) ∈ TermCat) |
| 19 | 15 | fucbas 18058 | . . . . . 6 ⊢ (𝑋 Func 𝑌) = (Base‘(𝑋 FuncCat 𝑌)) |
| 20 | simplr 781 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Func 𝑌)) | |
| 21 | fullfunc 18003 | . . . . . . 7 ⊢ (𝑋 Full 𝑌) ⊆ (𝑋 Func 𝑌) | |
| 22 | eqid 2762 | . . . . . . . . . 10 ⊢ (Base‘𝑋) = (Base‘𝑋) | |
| 23 | eqid 2762 | . . . . . . . . . 10 ⊢ (Base‘𝑌) = (Base‘𝑌) | |
| 24 | simpr 490 | . . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋𝐼𝑌)) | |
| 25 | 2, 22, 23, 9, 24 | catcisoi 50334 | . . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → (𝑔 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌)) ∧ (1st ‘𝑔):(Base‘𝑋)–1-1-onto→(Base‘𝑌))) |
| 26 | 25 | simpld 500 | . . . . . . . 8 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌))) |
| 27 | 26 | elin1d 4153 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋 Full 𝑌)) |
| 28 | 21, 27 | sselid 3932 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋 Func 𝑌)) |
| 29 | 18, 19, 20, 28 | termcbasmo 50417 | . . . . 5 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑓 = 𝑔) |
| 30 | 29, 24 | eqeltrd 2862 | . . . 4 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋𝐼𝑌)) |
| 31 | 14, 30 | exlimddv 1968 | . . 3 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) → 𝑓 ∈ (𝑋𝐼𝑌)) |
| 32 | simpr 490 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋𝐼𝑌)) | |
| 33 | 2, 22, 23, 9, 32 | catcisoi 50334 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → (𝑓 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌)) ∧ (1st ‘𝑓):(Base‘𝑋)–1-1-onto→(Base‘𝑌))) |
| 34 | 33 | simpld 500 | . . . . 5 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌))) |
| 35 | 34 | elin1d 4153 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Full 𝑌)) |
| 36 | 21, 35 | sselid 3932 | . . 3 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Func 𝑌)) |
| 37 | 31, 36 | impbida 813 | . 2 ⊢ (𝜑 → (𝑓 ∈ (𝑋 Func 𝑌) ↔ 𝑓 ∈ (𝑋𝐼𝑌))) |
| 38 | 37 | eqrdv 2760 | 1 ⊢ (𝜑 → (𝑋 Func 𝑌) = (𝑋𝐼𝑌)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∃wex 1812 ∈ wcel 2145 ∩ cin 3901 class class class wbr 5107 –1-1-onto→wf1o 6536 ‘cfv 6537 (class class class)co 7417 1st c1st 7988 Basecbs 17307 Catccat 17758 Isociso 17841 ≃𝑐 ccic 17890 Func cfunc 17949 Full cful 17999 Faith cfth 18000 FuncCat cfuc 18040 CatCatccatc 18193 TermCatctermc 50406 |
| 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 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-cnex 11184 ax-resscn 11185 ax-1cn 11186 ax-icn 11187 ax-addcl 11188 ax-addrcl 11189 ax-mulcl 11190 ax-mulrcl 11191 ax-mulcom 11192 ax-addass 11193 ax-mulass 11194 ax-distr 11195 ax-i2m1 11196 ax-1ne0 11197 ax-1rid 11198 ax-rnegex 11199 ax-rrecex 11200 ax-cnre 11201 ax-pre-lttri 11202 ax-pre-lttrn 11203 ax-pre-ltadd 11204 ax-pre-mulgt0 11205 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-tp 4592 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7374 df-ov 7420 df-oprab 7421 df-mpo 7422 df-om 7867 df-1st 7990 df-2nd 7991 df-supp 8163 df-tpos 8228 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-1o 8459 df-er 8700 df-map 8832 df-ixp 8909 df-en 8957 df-dom 8958 df-sdom 8959 df-fin 8960 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 df-sub 11471 df-neg 11472 df-nn 12262 df-2 12331 df-3 12332 df-4 12333 df-5 12334 df-6 12335 df-7 12336 df-8 12337 df-9 12338 df-n0 12533 df-z 12620 df-dec 12741 df-uz 12892 df-fz 13566 df-struct 17245 df-sets 17262 df-slot 17280 df-ndx 17292 df-base 17308 df-hom 17372 df-cco 17373 df-cat 17762 df-cid 17763 df-homf 17764 df-comf 17765 df-oppc 17806 df-sect 17842 df-inv 17843 df-iso 17844 df-cic 17891 df-func 17953 df-idfu 17954 df-cofu 17955 df-full 18001 df-fth 18002 df-nat 18041 df-fuc 18042 df-inito 18079 df-termo 18080 df-catc 18194 df-thinc 50352 df-termc 50407 |
| This theorem is used by: (None) |
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