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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 50568 | . . . . . . 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 50095 | . . . . . . . 8 ⊢ (𝑋( ≃𝑐 ‘𝐶)𝑌 → 𝐶 ∈ Cat) | |
| 11 | 8, 10 | syl 18 | . . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 12 | 9, 3, 11, 4, 5 | cic 17954 | . . . . . 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 2761 | . . . . . . . 8 ⊢ (𝑋 FuncCat 𝑌) = (𝑋 FuncCat 𝑌) | |
| 16 | 6 | termccatd 50531 | . . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ Cat) |
| 17 | 15, 16, 1 | fucterm 50594 | . . . . . . 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 18118 | . . . . . 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 18063 | . . . . . . 7 ⊢ (𝑋 Full 𝑌) ⊆ (𝑋 Func 𝑌) | |
| 22 | eqid 2761 | . . . . . . . . . 10 ⊢ (Base‘𝑋) = (Base‘𝑋) | |
| 23 | eqid 2761 | . . . . . . . . . 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 50452 | . . . . . . . . 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 4150 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋 Full 𝑌)) |
| 28 | 21, 27 | sselid 3929 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋 Func 𝑌)) |
| 29 | 18, 19, 20, 28 | termcbasmo 50535 | . . . . 5 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑓 = 𝑔) |
| 30 | 29, 24 | eqeltrd 2861 | . . . 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 50452 | . . . . . 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 4150 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Full 𝑌)) |
| 36 | 21, 35 | sselid 3929 | . . 3 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Func 𝑌)) |
| 37 | 31, 36 | impbida 813 | . 2 ⊢ (𝜑 → (𝑓 ∈ (𝑋 Func 𝑌) ↔ 𝑓 ∈ (𝑋𝐼𝑌))) |
| 38 | 37 | eqrdv 2759 | 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 3898 class class class wbr 5103 –1-1-onto→wf1o 6530 ‘cfv 6531 (class class class)co 7412 1st c1st 7988 Basecbs 17367 Catccat 17818 Isociso 17901 ≃𝑐 ccic 17950 Func cfunc 18009 Full cful 18059 Faith cfth 18060 FuncCat cfuc 18100 CatCatccatc 18253 TermCatctermc 50524 |
| 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 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-cnex 11237 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 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-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-1st 7990 df-2nd 7991 df-supp 8162 df-tpos 8227 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8460 df-er 8701 df-map 8833 df-ixp 8910 df-en 8958 df-dom 8959 df-sdom 8960 df-fin 8961 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-nn 12317 df-2 12386 df-3 12387 df-4 12388 df-5 12389 df-6 12390 df-7 12391 df-8 12392 df-9 12393 df-n0 12588 df-z 12675 df-dec 12796 df-uz 12947 df-fz 13621 df-struct 17305 df-sets 17322 df-slot 17340 df-ndx 17352 df-base 17368 df-hom 17432 df-cco 17433 df-cat 17822 df-cid 17823 df-homf 17824 df-comf 17825 df-oppc 17866 df-sect 17902 df-inv 17903 df-iso 17904 df-cic 17951 df-func 18013 df-idfu 18014 df-cofu 18015 df-full 18061 df-fth 18062 df-nat 18101 df-fuc 18102 df-inito 18139 df-termo 18140 df-catc 18254 df-thinc 50470 df-termc 50525 |
| This theorem is used by: (None) |
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