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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 50866 | . . . . . . 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 50372 | . . . . . . . 8 ⊢ (𝑋( ≃𝑐 ‘𝐶)𝑌 → 𝐶 ∈ Cat) | |
| 11 | 8, 10 | syl 18 | . . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 12 | 9, 3, 11, 4, 5 | cic 18006 | . . . . . 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 2763 | . . . . . . . 8 ⊢ (𝑋 FuncCat 𝑌) = (𝑋 FuncCat 𝑌) | |
| 16 | 6 | termccatd 50829 | . . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ Cat) |
| 17 | 15, 16, 1 | fucterm 50895 | . . . . . . 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 18170 | . . . . . 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 18115 | . . . . . . 7 ⊢ (𝑋 Full 𝑌) ⊆ (𝑋 Func 𝑌) | |
| 22 | eqid 2763 | . . . . . . . . . 10 ⊢ (Base‘𝑋) = (Base‘𝑋) | |
| 23 | eqid 2763 | . . . . . . . . . 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 50750 | . . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → (𝑔 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌)) ∧ (1st ‘𝑔):(Base‘𝑋)⟶1-1onto(Base‘𝑌))) |
| 26 | 25 | simpld 500 | . . . . . . . 8 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌))) |
| 27 | 26 | elin1d 4104 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋 Full 𝑌)) |
| 28 | 21, 27 | sselid 3911 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋 Func 𝑌)) |
| 29 | 18, 19, 20, 28 | termcbasmo 50833 | . . . . 5 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑓 = 𝑔) |
| 30 | 29, 24 | eqeltrd 2864 | . . . 4 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋𝐼𝑌)) |
| 31 | 14, 30 | exlimddv 1970 | . . 3 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) → 𝑓 ∈ (𝑋𝐼𝑌)) |
| 32 | simpr 490 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋𝐼𝑌)) | |
| 33 | 2, 22, 23, 9, 32 | catcisoi 50750 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → (𝑓 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌)) ∧ (1st ‘𝑓):(Base‘𝑋)⟶1-1onto(Base‘𝑌))) |
| 34 | 33 | simpld 500 | . . . . 5 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌))) |
| 35 | 34 | elin1d 4104 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Full 𝑌)) |
| 36 | 21, 35 | sselid 3911 | . . 3 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Func 𝑌)) |
| 37 | 31, 36 | impbida 813 | . 2 ⊢ (𝜑 → (𝑓 ∈ (𝑋 Func 𝑌) ↔ 𝑓 ∈ (𝑋𝐼𝑌))) |
| 38 | 37 | eqrdv 2761 | 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 2147 ∩ cin 4092 class class class wbr 5106 ⟶1-1ontowf1o 6560 ‘cfv 6561 (class class class)co 7446 1st c1st 8026 Basecbs 17419 Catccat 17870 Isociso 17953 ≃𝑐 ccic 18002 Func cfunc 18061 Full cful 18111 Faith cfth 18112 FuncCat cfuc 18152 CatCatccatc 18305 TermCatctermc 50822 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5236 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7778 ax-cnex 11286 ax-resscn 11287 ax-1cn 11288 ax-icn 11289 ax-addcl 11290 ax-addrcl 11291 ax-mulcl 11292 ax-mulrcl 11293 ax-mulcom 11294 ax-addass 11295 ax-mulass 11296 ax-distr 11297 ax-i2m1 11298 ax-1ne0 11299 ax-1rid 11300 ax-rnegex 11301 ax-rrecex 11302 ax-cnre 11303 ax-pre-lttri 11304 ax-pre-lttrn 11305 ax-pre-ltadd 11306 ax-pre-mulgt0 11307 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6325 df-ord 6386 df-on 6387 df-lim 6388 df-suc 6389 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7403 df-ov 7449 df-oprab 7450 df-mpo 7451 df-om 7905 df-1st 8028 df-2nd 8029 df-supp 8208 df-tpos 8274 df-frecs 8330 df-wrecs 8361 df-recs 8410 df-rdg 8449 df-1o 8507 df-er 8748 df-map 8880 df-ixp 8957 df-en 9005 df-dom 9006 df-sdom 9007 df-fin 9008 df-pnf 11375 df-mnf 11376 df-xr 11377 df-ltxr 11378 df-le 11379 df-sub 11573 df-neg 11574 df-nn 12366 df-2 12435 df-3 12436 df-4 12437 df-5 12438 df-6 12439 df-7 12440 df-8 12441 df-9 12442 df-n0 12637 df-z 12724 df-dec 12845 df-uz 12996 df-fz 13670 df-struct 17357 df-sets 17374 df-slot 17392 df-ndx 17404 df-base 17420 df-hom 17484 df-cco 17485 df-cat 17874 df-cid 17875 df-homf 17876 df-comf 17877 df-oppc 17918 df-sect 17954 df-inv 17955 df-iso 17956 df-cic 18003 df-func 18065 df-idfu 18066 df-cofu 18067 df-full 18113 df-fth 18114 df-nat 18153 df-fuc 18154 df-inito 18191 df-termo 18192 df-catc 18306 df-thinc 50768 df-termc 50823 |
| This theorem is used by: (None) |
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