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| Mirrors > Home > MPE Home > Th. List > rngccat | Structured version Visualization version GIF version | ||
| Description: The category of non-unital rings is a category. (Contributed by AV, 27-Feb-2020.) (Revised by AV, 9-Mar-2020.) |
| Ref | Expression |
|---|---|
| rngccat.c | ⊢ 𝐶 = (RngCat‘𝑈) |
| Ref | Expression |
|---|---|
| rngccat | ⊢ (𝑈 ∈ 𝑉 → 𝐶 ∈ Cat) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rngccat.c | . . 3 ⊢ 𝐶 = (RngCat‘𝑈) | |
| 2 | id 22 | . . 3 ⊢ (𝑈 ∈ 𝑉 → 𝑈 ∈ 𝑉) | |
| 3 | eqidd 2731 | . . 3 ⊢ (𝑈 ∈ 𝑉 → (𝑈 ∩ Rng) = (𝑈 ∩ Rng)) | |
| 4 | eqidd 2731 | . . 3 ⊢ (𝑈 ∈ 𝑉 → ( RngHom ↾ ((𝑈 ∩ Rng) × (𝑈 ∩ Rng))) = ( RngHom ↾ ((𝑈 ∩ Rng) × (𝑈 ∩ Rng)))) | |
| 5 | 1, 2, 3, 4 | rngcval 20534 | . 2 ⊢ (𝑈 ∈ 𝑉 → 𝐶 = ((ExtStrCat‘𝑈) ↾cat ( RngHom ↾ ((𝑈 ∩ Rng) × (𝑈 ∩ Rng))))) |
| 6 | eqid 2730 | . . 3 ⊢ ((ExtStrCat‘𝑈) ↾cat ( RngHom ↾ ((𝑈 ∩ Rng) × (𝑈 ∩ Rng)))) = ((ExtStrCat‘𝑈) ↾cat ( RngHom ↾ ((𝑈 ∩ Rng) × (𝑈 ∩ Rng)))) | |
| 7 | eqid 2730 | . . . 4 ⊢ (ExtStrCat‘𝑈) = (ExtStrCat‘𝑈) | |
| 8 | eqidd 2731 | . . . 4 ⊢ (𝑈 ∈ 𝑉 → (Rng ∩ 𝑈) = (Rng ∩ 𝑈)) | |
| 9 | incom 4175 | . . . . . . 7 ⊢ (𝑈 ∩ Rng) = (Rng ∩ 𝑈) | |
| 10 | 9 | a1i 11 | . . . . . 6 ⊢ (𝑈 ∈ 𝑉 → (𝑈 ∩ Rng) = (Rng ∩ 𝑈)) |
| 11 | 10 | sqxpeqd 5673 | . . . . 5 ⊢ (𝑈 ∈ 𝑉 → ((𝑈 ∩ Rng) × (𝑈 ∩ Rng)) = ((Rng ∩ 𝑈) × (Rng ∩ 𝑈))) |
| 12 | 11 | reseq2d 5953 | . . . 4 ⊢ (𝑈 ∈ 𝑉 → ( RngHom ↾ ((𝑈 ∩ Rng) × (𝑈 ∩ Rng))) = ( RngHom ↾ ((Rng ∩ 𝑈) × (Rng ∩ 𝑈)))) |
| 13 | 7, 2, 8, 12 | rnghmsubcsetc 20549 | . . 3 ⊢ (𝑈 ∈ 𝑉 → ( RngHom ↾ ((𝑈 ∩ Rng) × (𝑈 ∩ Rng))) ∈ (Subcat‘(ExtStrCat‘𝑈))) |
| 14 | 6, 13 | subccat 17817 | . 2 ⊢ (𝑈 ∈ 𝑉 → ((ExtStrCat‘𝑈) ↾cat ( RngHom ↾ ((𝑈 ∩ Rng) × (𝑈 ∩ Rng)))) ∈ Cat) |
| 15 | 5, 14 | eqeltrd 2829 | 1 ⊢ (𝑈 ∈ 𝑉 → 𝐶 ∈ Cat) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 ∩ cin 3916 × cxp 5639 ↾ cres 5643 ‘cfv 6514 (class class class)co 7390 Catccat 17632 ↾cat cresc 17777 ExtStrCatcestrc 18090 Rngcrng 20068 RngHom crnghm 20350 RngCatcrngc 20532 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-rep 5237 ax-sep 5254 ax-nul 5264 ax-pow 5323 ax-pr 5390 ax-un 7714 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-rmo 3356 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3757 df-csb 3866 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-pss 3937 df-nul 4300 df-if 4492 df-pw 4568 df-sn 4593 df-pr 4595 df-tp 4597 df-op 4599 df-uni 4875 df-iun 4960 df-br 5111 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5536 df-eprel 5541 df-po 5549 df-so 5550 df-fr 5594 df-we 5596 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-pred 6277 df-ord 6338 df-on 6339 df-lim 6340 df-suc 6341 df-iota 6467 df-fun 6516 df-fn 6517 df-f 6518 df-f1 6519 df-fo 6520 df-f1o 6521 df-fv 6522 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7846 df-1st 7971 df-2nd 7972 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8381 df-1o 8437 df-er 8674 df-map 8804 df-pm 8805 df-ixp 8874 df-en 8922 df-dom 8923 df-sdom 8924 df-fin 8925 df-pnf 11217 df-mnf 11218 df-xr 11219 df-ltxr 11220 df-le 11221 df-sub 11414 df-neg 11415 df-nn 12194 df-2 12256 df-3 12257 df-4 12258 df-5 12259 df-6 12260 df-7 12261 df-8 12262 df-9 12263 df-n0 12450 df-z 12537 df-dec 12657 df-uz 12801 df-fz 13476 df-struct 17124 df-sets 17141 df-slot 17159 df-ndx 17171 df-base 17187 df-ress 17208 df-plusg 17240 df-hom 17251 df-cco 17252 df-0g 17411 df-cat 17636 df-cid 17637 df-homf 17638 df-ssc 17779 df-resc 17780 df-subc 17781 df-estrc 18091 df-mgm 18574 df-mgmhm 18626 df-sgrp 18653 df-mnd 18669 df-mhm 18717 df-grp 18875 df-ghm 19152 df-abl 19720 df-mgp 20057 df-rng 20069 df-rnghm 20352 df-rngc 20533 |
| This theorem is referenced by: rngcsect 20552 rngcinv 20553 rngciso 20554 zrinitorngc 20558 zrtermorngc 20559 zrzeroorngc 20560 rhmsubcrngc 20584 rhmsubc 20605 |
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