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| Mirrors > Home > MPE Home > Th. List > Mathboxes > uobeq2 | Structured version Visualization version GIF version | ||
| Description: If a full functor (in fact, a full embedding) is a section, then the sets of universal objects are equal. (Contributed by Zhi Wang, 17-Nov-2025.) |
| Ref | Expression |
|---|---|
| uobeq2.b | ⊢ 𝐵 = (Base‘𝐷) |
| uobeq2.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| uobeq2.f | ⊢ (𝜑 → 𝐹 ∈ (𝐶 Func 𝐷)) |
| uobeq2.g | ⊢ (𝜑 → (𝐾 ∘func 𝐹) = 𝐺) |
| uobeq2.y | ⊢ (𝜑 → ((1st ‘𝐾)‘𝑋) = 𝑌) |
| uobeq2.q | ⊢ 𝑄 = (CatCat‘𝑈) |
| uobeq2.s | ⊢ 𝑆 = (Sect‘𝑄) |
| uobeq2.k | ⊢ (𝜑 → 𝐾 ∈ (𝐷 Full 𝐸)) |
| uobeq2.1 | ⊢ (𝜑 → 𝐾 ∈ dom (𝐷𝑆𝐸)) |
| Ref | Expression |
|---|---|
| uobeq2 | ⊢ (𝜑 → dom (𝐹(𝐶 UP 𝐷)𝑋) = dom (𝐺(𝐶 UP 𝐸)𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uobeq2.1 | . . 3 ⊢ (𝜑 → 𝐾 ∈ dom (𝐷𝑆𝐸)) | |
| 2 | eldmg 5880 | . . . 4 ⊢ (𝐾 ∈ dom (𝐷𝑆𝐸) → (𝐾 ∈ dom (𝐷𝑆𝐸) ↔ ∃𝑙 𝐾(𝐷𝑆𝐸)𝑙)) | |
| 3 | 2 | ibi 270 | . . 3 ⊢ (𝐾 ∈ dom (𝐷𝑆𝐸) → ∃𝑙 𝐾(𝐷𝑆𝐸)𝑙) |
| 4 | 1, 3 | syl 18 | . 2 ⊢ (𝜑 → ∃𝑙 𝐾(𝐷𝑆𝐸)𝑙) |
| 5 | uobeq2.b | . . 3 ⊢ 𝐵 = (Base‘𝐷) | |
| 6 | uobeq2.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 7 | 6 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝐾(𝐷𝑆𝐸)𝑙) → 𝑋 ∈ 𝐵) |
| 8 | uobeq2.f | . . . 4 ⊢ (𝜑 → 𝐹 ∈ (𝐶 Func 𝐷)) | |
| 9 | 8 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝐾(𝐷𝑆𝐸)𝑙) → 𝐹 ∈ (𝐶 Func 𝐷)) |
| 10 | uobeq2.g | . . . 4 ⊢ (𝜑 → (𝐾 ∘func 𝐹) = 𝐺) | |
| 11 | 10 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝐾(𝐷𝑆𝐸)𝑙) → (𝐾 ∘func 𝐹) = 𝐺) |
| 12 | uobeq2.y | . . . 4 ⊢ (𝜑 → ((1st ‘𝐾)‘𝑋) = 𝑌) | |
| 13 | 12 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝐾(𝐷𝑆𝐸)𝑙) → ((1st ‘𝐾)‘𝑋) = 𝑌) |
| 14 | eqid 2761 | . . 3 ⊢ (idfunc‘𝐷) = (idfunc‘𝐷) | |
| 15 | uobeq2.k | . . . 4 ⊢ (𝜑 → 𝐾 ∈ (𝐷 Full 𝐸)) | |
| 16 | 15 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝐾(𝐷𝑆𝐸)𝑙) → 𝐾 ∈ (𝐷 Full 𝐸)) |
| 17 | uobeq2.q | . . . . . 6 ⊢ 𝑄 = (CatCat‘𝑈) | |
| 18 | eqid 2761 | . . . . . 6 ⊢ (Hom ‘𝑄) = (Hom ‘𝑄) | |
| 19 | uobeq2.s | . . . . . 6 ⊢ 𝑆 = (Sect‘𝑄) | |
| 20 | 17, 18, 14, 19 | catcsect 50507 | . . . . 5 ⊢ (𝐾(𝐷𝑆𝐸)𝑙 ↔ ((𝐾 ∈ (𝐷(Hom ‘𝑄)𝐸) ∧ 𝑙 ∈ (𝐸(Hom ‘𝑄)𝐷)) ∧ (𝑙 ∘func 𝐾) = (idfunc‘𝐷))) |
| 21 | 20 | simprbi 503 | . . . 4 ⊢ (𝐾(𝐷𝑆𝐸)𝑙 → (𝑙 ∘func 𝐾) = (idfunc‘𝐷)) |
| 22 | 21 | adantl 487 | . . 3 ⊢ ((𝜑 ∧ 𝐾(𝐷𝑆𝐸)𝑙) → (𝑙 ∘func 𝐾) = (idfunc‘𝐷)) |
| 23 | 20 | simplbi 502 | . . . . . 6 ⊢ (𝐾(𝐷𝑆𝐸)𝑙 → (𝐾 ∈ (𝐷(Hom ‘𝑄)𝐸) ∧ 𝑙 ∈ (𝐸(Hom ‘𝑄)𝐷))) |
| 24 | 23 | simprd 501 | . . . . 5 ⊢ (𝐾(𝐷𝑆𝐸)𝑙 → 𝑙 ∈ (𝐸(Hom ‘𝑄)𝐷)) |
| 25 | 17, 18, 24 | elcatchom 50506 | . . . 4 ⊢ (𝐾(𝐷𝑆𝐸)𝑙 → 𝑙 ∈ (𝐸 Func 𝐷)) |
| 26 | 25 | adantl 487 | . . 3 ⊢ ((𝜑 ∧ 𝐾(𝐷𝑆𝐸)𝑙) → 𝑙 ∈ (𝐸 Func 𝐷)) |
| 27 | 5, 7, 9, 11, 13, 14, 16, 22, 26 | uobeq 50329 | . 2 ⊢ ((𝜑 ∧ 𝐾(𝐷𝑆𝐸)𝑙) → dom (𝐹(𝐶 UP 𝐷)𝑋) = dom (𝐺(𝐶 UP 𝐸)𝑌)) |
| 28 | 4, 27 | exlimddv 1968 | 1 ⊢ (𝜑 → dom (𝐹(𝐶 UP 𝐷)𝑋) = dom (𝐺(𝐶 UP 𝐸)𝑌)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∃wex 1812 ∈ wcel 2145 class class class wbr 5103 dom cdm 5651 ‘cfv 6539 (class class class)co 7421 1st c1st 8000 Basecbs 17388 Hom chom 17440 Sectcsect 17920 Func cfunc 18030 idfunccidfu 18031 ∘func ccofu 18032 Full cful 18080 CatCatccatc 18274 UP cup 50282 |
| 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 7752 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 |
| 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 3900 df-un 3902 df-in 3904 df-ss 3915 df-pss 4035 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 6305 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-om 7879 df-1st 8002 df-2nd 8003 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-1o 8477 df-er 8718 df-map 8850 df-ixp 8927 df-en 8975 df-dom 8976 df-sdom 8977 df-fin 8978 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-nn 12337 df-2 12406 df-3 12407 df-4 12408 df-5 12409 df-6 12410 df-7 12411 df-8 12412 df-9 12413 df-n0 12608 df-z 12695 df-dec 12816 df-uz 12967 df-fz 13641 df-struct 17326 df-slot 17361 df-ndx 17373 df-base 17389 df-hom 17453 df-cco 17454 df-cat 17843 df-cid 17844 df-sect 17923 df-func 18034 df-idfu 18035 df-cofu 18036 df-full 18082 df-fth 18083 df-catc 18275 df-up 50283 |
| This theorem is used by: (None) |
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