edi8 Posted December 17, 2017 Share Posted December 17, 2017 9 hours ago, pauloeasy said: C(23,10,5,8) = 16 By Ininuga 1 2 3 4 5 6 13 14 18 20 21 22 23 1 2 3 4 5 6 13 14 19 20 21 22 23 1 2 3 4 7 8 11 12 15 16 17 20 21 1 2 3 4 9 10 11 12 14 15 17 18 19 1 2 3 4 9 10 13 14 15 16 17 18 19 1 2 5 6 7 8 13 15 17 18 19 22 23 1 2 5 6 7 8 14 15 17 18 19 22 23 1 2 5 6 9 10 11 12 16 18 19 20 21 1 2 7 8 9 10 11 12 13 14 16 22 23 1 5 6 7 8 9 10 13 14 15 17 20 21 2 5 6 7 8 9 10 13 14 15 17 20 21 3 4 5 6 7 8 11 12 13 14 16 18 19 3 4 5 6 9 10 11 12 15 16 17 22 23 3 4 7 8 9 10 15 18 19 20 21 22 23 3 4 7 8 9 10 17 18 19 20 21 22 23 11 12 13 14 15 16 17 18 19 20 21 22 23 This is not system C(23,10,5,8) but C(23,13,5,8) Quote Link to comment Share on other sites More sharing options...
edi8 Posted December 17, 2017 Share Posted December 17, 2017 Sorry, this is not system C(23,10,5,8)=16 but inverse in C(23,13,10,15)=16 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 17, 2017 Author Share Posted December 17, 2017 Biblioteca sobre Matrizes (Wheels/Covering Library) New Constructions for Covering Designs - UC Davis Mathematics link https://www.math.ucdavis.edu/~deloera/MISC/LA-BIBLIO/trunk/Kuperberg/Kuperberg5.pdf New lower bounds for $ t $-coverings Daniel Horsley e Rakhi Singh linkhttps://arxiv.org/pdf/1706.06825v2.pdf Trabalhos sobre Covering Designs e Combinatoricahttp://dblp.uni-trier.de/pers/hd/h/Horsley:Daniel Se puderem acrescentar literatura sobre o assunto seria interessante. 1 Quote Link to comment Share on other sites More sharing options...
Rodolfo822 Posted December 17, 2017 Share Posted December 17, 2017 1 minuto atrás, pauloeasy disse: Biblioteca sobre Matrizes Onde está todo aquele repositório do Weefs ? Se perdeu para sempre ? Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 17, 2017 Author Share Posted December 17, 2017 sim Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 17, 2017 Author Share Posted December 17, 2017 4 minutos atrás, Rodolfo822 disse: Onde está todo aquele repositório do Weefs ? Se perdeu para sempre ? Sim. Segundo pessoas que conversaram com ele, não cederá e nem vai publicar. Alternativas é criar um banco de dados alternativo. Como o Lottodesigns, o pessoal da Polonia, aqui se pudermos ir elencando e recuperando. Quote Link to comment Share on other sites More sharing options...
Rodolfo822 Posted December 17, 2017 Share Posted December 17, 2017 2 minutos atrás, pauloeasy disse: o pessoal da Polonia Qual é o site ? Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 17, 2017 Author Share Posted December 17, 2017 Multipasko.pl (Edi8, Vidmo, 777ch e kleszek) 1 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 17, 2017 Author Share Posted December 17, 2017 3 horas atrás, edi8 disse: This is not system C(23,10,5,8) but C(23,13,5,8) Thansk Edi8 I'll correct it Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 17, 2017 Author Share Posted December 17, 2017 C(23,10,7,15)=16 07 08 09 10 11 12 15 16 17 19 07 08 09 10 11 12 15 16 17 18 05 06 09 10 13 14 18 19 22 23 05 06 07 08 13 16 20 21 22 23 05 06 07 08 11 12 20 21 22 23 03 04 09 10 11 12 14 16 20 21 03 04 09 10 11 12 13 16 20 21 03 04 07 08 13 14 15 17 22 23 03 04 05 06 15 17 18 19 20 21 02 03 04 11 12 16 18 19 22 23 01 03 04 11 12 16 18 19 22 23 01 02 09 10 15 17 20 21 22 23 01 02 07 08 13 14 18 19 20 21 01 02 05 06 11 12 13 14 16 17 01 02 05 06 11 12 13 14 15 16 01 02 03 04 05 06 07 08 09 10 ...................... inversa C(23,13,5,8)=16 1 2 3 4 5 6 13 14 18 20 21 22 23 1 2 3 4 5 6 13 14 19 20 21 22 23 1 2 3 4 7 8 11 12 15 16 17 20 21 1 2 3 4 9 10 11 12 14 15 17 18 19 1 2 3 4 9 10 13 14 15 16 17 18 19 1 2 5 6 7 8 13 15 17 18 19 22 23 1 2 5 6 7 8 14 15 17 18 19 22 23 1 2 5 6 9 10 11 12 16 18 19 20 21 1 2 7 8 9 10 11 12 13 14 16 22 23 1 5 6 7 8 9 10 13 14 15 17 20 21 2 5 6 7 8 9 10 13 14 15 17 20 21 3 4 5 6 7 8 11 12 13 14 16 18 19 3 4 5 6 9 10 11 12 15 16 17 22 23 3 4 7 8 9 10 15 18 19 20 21 22 23 3 4 7 8 9 10 17 18 19 20 21 22 23 11 12 13 14 15 16 17 18 19 20 21 22 23 ...................... Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 17, 2017 Author Share Posted December 17, 2017 C(30,10,05,06)=442 C(31,10,05,06)=533 autor: Weber Azevedo linkhttp://wheels.forumcommunity.net/?act=Attach&type=post&id=429290340 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 17, 2017 Author Share Posted December 17, 2017 C(33,25,8,8) = 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 26 27 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 23 24 25 26 27 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 22 23 24 29 30 31 32 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 20 21 22 23 24 25 26 27 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 18 19 22 25 26 29 30 31 32 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 20 21 22 27 28 29 30 31 32 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 18 20 23 25 27 29 30 31 32 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 19 21 23 26 28 29 30 31 32 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 17 18 21 24 25 28 29 30 31 32 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 17 19 20 24 26 27 29 30 31 32 33 1 2 3 8 9 10 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 1 4 5 8 11 12 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 1 6 7 8 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 2 4 6 9 11 13 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 2 5 7 9 12 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 3 4 7 10 11 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 3 5 6 10 12 13 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 17, 2017 Author Share Posted December 17, 2017 C(33,8,3,5)=32 Weefs 01 02 03 13 21 22 23 31 01 02 11 12 21 25 31 33 01 02 21 24 26 27 31 32 01 03 11 23 24 31 32 33 01 03 12 23 25 26 27 31 01 11 13 22 26 27 31 33 01 12 13 22 24 25 31 32 02 03 11 21 23 26 27 33 02 03 12 21 23 24 25 32 02 11 13 21 22 24 32 33 02 12 13 21 22 25 26 27 03 11 12 13 22 23 25 33 03 13 22 23 24 26 27 32 04 05 06 08 09 14 20 29 04 05 07 09 15 18 19 28 04 05 08 14 20 28 29 30 04 05 09 10 15 16 17 30 04 06 07 15 16 19 29 30 04 06 10 17 18 28 29 30 04 07 08 10 14 17 19 20 04 08 14 15 16 18 20 28 05 06 07 14 16 17 28 30 05 06 10 14 15 18 19 30 05 07 08 10 15 20 28 29 05 08 16 17 18 19 20 29 06 07 08 09 10 16 18 30 06 07 09 10 16 18 20 30 06 08 09 15 17 19 20 28 07 09 14 15 17 18 19 29 08 10 15 17 19 20 28 30 09 10 14 16 19 28 29 30 11 12 24 25 26 27 32 33 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 18, 2017 Author Share Posted December 18, 2017 C(23,5,3,8) = 15 Weefs 01 09 12 19 20 01 09 14 19 23 02 04 06 16 22 02 05 10 15 17 02 06 17 18 21 02 07 16 21 22 03 05 09 13 19 03 12 13 14 20 03 12 13 20 23 04 05 10 15 21 04 07 08 11 18 04 07 16 17 22 05 06 07 10 15 06 08 11 17 21 08 11 16 18 22 Inverso C(23,18,13,15) = 15 Weefs 02 03 04 05 06 07 08 10 11 13 14 15 16 17 18 21 22 23 02 03 04 05 06 07 08 10 11 12 13 15 16 17 18 20 21 22 01 03 05 07 08 09 10 11 12 13 14 15 17 18 19 20 21 23 01 03 04 06 07 08 09 11 12 13 14 16 18 19 20 21 22 23 01 03 04 05 07 08 09 10 11 12 13 14 15 16 19 20 22 23 01 03 04 05 06 08 09 10 11 12 13 14 15 17 18 19 20 23 01 02 04 06 07 08 10 11 12 14 15 16 17 18 20 21 22 23 01 02 04 05 06 07 08 09 10 11 15 16 17 18 19 21 22 23 01 02 04 05 06 07 08 09 10 11 14 15 16 17 18 19 21 22 01 02 03 06 07 08 09 11 12 13 14 16 17 18 19 20 22 23 01 02 03 05 06 09 10 12 13 14 15 16 17 19 20 21 22 23 01 02 03 05 06 08 09 10 11 12 13 14 15 18 19 20 21 23 01 02 03 04 08 09 11 12 13 14 16 17 18 19 20 21 22 23 01 02 03 04 05 07 09 10 12 13 14 15 16 18 19 20 22 23 01 02 03 04 05 06 07 09 10 12 13 14 15 17 19 20 21 23 .................. 1 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 18, 2017 Author Share Posted December 18, 2017 C(28,9,5,8) = 114 Rosmarinomartin link http://wheels.forumcommunity.net/?act=Attach&type=post&id=429306530 ................ Quote Link to comment Share on other sites More sharing options...
BigMax Posted December 18, 2017 Share Posted December 18, 2017 No momento é record 25,10,9,10=50872 (BigMax_Tarullig) ou inv. 25,15,14,15=50872 25,15,14,15=50872 BigMax_Tarullig).txt V10250910-50872.txt 1 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 18, 2017 Author Share Posted December 18, 2017 Melhoria no numero de combinações 24-09-06-08 = 328 autor: Rosmarinomartin http://wheels.forumcommunity.net/?act=Attach&type=post&id=429316291 1 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 19, 2017 Author Share Posted December 19, 2017 Matrizes 26,10,8,9=10596 27,8,7,13=593 29,6,6,11=5072 30,6,6,11=6570 30,8,7,8=73890 NinoAspesi MarcoMeoli 31,8,7,8=98289 NinoAspesi MarcoMeoli 38,10,5,6=1712 46,4,4,6=23918 90,10,5,12=5445 http://wheels.forumcommunity.net/?act=Attach&type=post&id=429327930 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 19, 2017 Author Share Posted December 19, 2017 C(38,10,5,6)= 1708 (Jurcovich e Aspesi) irmãos gemeos ( fratelli gemelli) http://wheels.forumcommunity.net/?act=Attach&type=post&id=429354206 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 19, 2017 Author Share Posted December 19, 2017 https://www.ccrwest.org/cover/show_improvements.php Recent Improvements v k t size creator method timestamp 68 19 5 2602 Enzo Franzese 2017-12-18 11:08:30 70 19 5 2608 Enzo Franzese 2017-12-18 09:10:19 69 19 5 2605 Enzo Franzese 2017-12-18 09:08:22 68 19 5 2604 Enzo Franzese 2017-12-18 09:06:23 68 11 4 5051 Enzo Franzese 2017-12-18 09:04:20 67 19 5 2596 Enzo Franzese 2017-12-18 09:02:19 64 18 5 2546 Enzo Franzese 2017-12-18 09:00:32 67 19 5 2600 Stefano de Martino added element to c(v-1,k-1,t) 2017-12-15 23:30:36 64 18 5 2551 Stefano de Martino added element to c(v-1,k-1,t) 2017-12-15 23:29:48 63 18 5 2447 Stefano de Martino added element to c(v-1,k-1,t) 2017-12-15 23:28:47 60 17 5 2447 Stefano de Martino deleted elements from c(v+1,k,t) 2017-12-15 23:27:18 61 17 5 2447 Stefano de Martino deleted elements from c(v+1,k,t) 2017-12-15 23:26:07 30 8 5 3763 Dietmar Pree Private tools 2017-12-13 12:50:01 97 22 4 1052 Jan de Heer and Steve Muir Private tools 2017-12-13 07:53:56 96 22 4 996 Jan de Heer and Steve Muir Private tools 2017-12-13 07:53:18 95 22 4 946 Jan de Heer and Steve Muir Private tools 2017-12-13 07:52:47 70 11 4 5552 Jan de Heer and Steve Muir Private tools 2017-12-13 07:52:12 68 18 5 2734 Jan de Heer and Steve Muir Private tools 2017-12-13 00:54:58 67 18 5 2640 Jan de Heer and Steve Muir Private tools 2017-12-12 00:05:27 Lista zerada em 1 semana Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 20, 2017 Author Share Posted December 20, 2017 24,09,07,16 =8 Renzo01 02 09 19 20 21 22 23 2401 03 07 10 12 17 20 22 2401 04 05 06 14 15 18 20 2402 04 06 08 10 12 14 16 1802 05 08 10 11 12 13 15 1603 04 07 11 13 15 17 18 2203 07 08 09 16 17 19 21 2305 06 09 11 13 14 19 21 23- - - - - - - -C(25, 09.07.17) =6 Renzo01 02 03 07 15 17 20 22 2501 03 04 05 07 17 18 20 2401 03 07 08 10 12 16 17 2002 04 08 10 12 15 16 18 2202 05 08 10 12 15 16 22 2406 09 11 13 14 19 21 23 25 Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 20, 2017 Author Share Posted December 20, 2017 C(26,5,3,4)=137 autor: Jan De Heer, Steve Muir. Spoiler 1 2 4 5 13 1 2 5 8 22 1 2 7 13 15 1 2 17 22 26 1 3 4 12 19 1 3 6 10 14 1 3 17 20 21 1 4 5 23 26 1 4 6 19 21 1 4 7 8 17 1 4 9 22 26 1 4 14 19 24 1 5 7 9 15 1 5 11 14 25 1 5 14 16 18 1 5 15 19 24 1 6 12 17 20 1 7 15 22 23 1 8 13 15 26 1 9 13 17 23 1 10 11 18 19 1 10 12 14 21 1 10 16 19 25 1 10 17 19 24 1 10 19 20 24 1 11 15 16 20 1 15 18 20 25 2 3 6 11 23 2 3 8 18 25 2 3 9 16 24 2 4 7 9 14 2 4 8 9 20 2 4 8 9 26 2 4 17 22 23 2 5 7 10 22 2 5 7 20 23 2 5 9 15 26 2 6 8 12 16 2 6 9 18 24 2 6 9 21 25 2 7 13 17 19 2 8 10 13 17 2 8 11 21 24 2 8 15 19 22 2 9 10 19 26 2 9 11 12 18 2 10 14 15 24 2 10 20 22 23 2 12 23 24 25 2 13 14 20 26 2 14 19 22 23 2 16 18 21 23 3 4 5 6 17 3 4 10 15 21 3 5 10 12 20 3 5 14 19 21 3 6 7 16 24 3 6 8 9 11 3 6 15 19 20 3 7 11 25 26 3 7 12 18 21 3 8 16 23 24 3 9 18 23 25 3 11 13 24 25 3 11 16 22 25 3 12 13 16 26 3 12 14 15 17 3 12 22 24 25 3 13 18 21 22 3 18 21 24 26 4 5 9 10 24 4 5 11 16 19 4 5 12 17 21 4 5 18 19 25 4 6 10 12 15 4 7 13 14 23 4 7 20 22 26 4 8 13 20 23 4 8 14 22 26 4 9 13 17 26 4 10 11 15 25 4 10 15 16 18 4 11 14 18 20 4 14 16 20 25 4 15 17 20 24 5 6 10 20 21 5 6 12 14 19 5 7 8 13 15 5 8 10 20 26 5 8 14 15 23 5 9 13 20 22 5 10 13 23 26 5 11 15 17 18 5 14 17 20 24 5 15 16 17 25 5 15 22 23 26 6 7 11 18 25 6 7 18 22 26 6 8 18 23 24 6 8 21 23 25 6 9 12 16 23 6 11 13 16 26 6 11 16 22 24 6 12 13 18 24 6 13 21 22 25 6 14 15 17 21 6 16 24 25 26 7 8 10 19 23 7 8 14 20 22 7 9 10 13 20 7 9 17 19 22 7 10 17 23 26 7 11 12 24 26 7 11 16 21 26 7 12 13 16 25 7 14 15 19 26 7 18 21 24 25 8 9 10 17 22 8 9 12 24 25 8 9 13 14 19 8 9 16 18 21 8 11 12 18 23 8 17 19 23 26 9 11 21 23 24 9 13 14 15 22 9 13 15 19 23 9 14 20 23 26 10 11 14 16 17 10 13 19 22 26 10 14 17 18 25 11 12 13 21 22 11 17 19 20 25 12 15 19 20 21 12 16 18 22 24 12 18 21 25 26 13 16 21 22 24 16 17 18 19 20 .......................... Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 20, 2017 Author Share Posted December 20, 2017 C(15,6,2,3)=4 Invers(15,09,08,12) 01 03 10 11 14 15 01 05 08 09 10 15 02 04 06 07 12 13 03 05 08 09 11 14 ................. inversa C(15,9,8,12)=4 01 02 03 06 07 08 11 13 15 01 02 04 06 07 10 12 13 15 01 02 05 06 07 09 13 14 15 03 04 05 08 09 10 11 12 14 .................... Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 20, 2017 Author Share Posted December 20, 2017 C(16,6,2,3)=5 01 02 03 04 11 15 01 03 04 05 07 15 01 03 04 10 12 15 02 05 07 10 11 12 06 08 09 13 14 16 .................. inversa C(16,10,9,13)=5 05 06 07 08 09 10 12 13 14 16 02 06 08 09 10 11 12 13 14 16 02 05 06 07 08 09 11 13 14 16 01 03 04 06 08 09 13 14 15 16 01 02 03 04 05 07 10 11 12 15 ....................... Quote Link to comment Share on other sites More sharing options...
iziplay Posted December 20, 2017 Author Share Posted December 20, 2017 C(27,5,3,4)=151 autor: Jan De Heer, Steve Muir. Spoiler 1 2 3 9 16 1 2 4 8 10 1 2 5 6 12 1 3 4 5 7 1 3 6 9 14 1 3 10 12 15 1 4 6 9 15 1 4 9 12 13 1 4 10 11 14 1 5 6 8 11 1 5 9 22 27 1 5 13 14 15 1 5 17 23 25 1 5 23 26 27 1 6 7 10 13 1 6 18 20 22 1 6 19 21 22 1 7 8 9 11 1 9 17 24 26 1 9 24 25 27 1 10 18 21 24 1 10 19 20 24 1 16 17 22 27 1 16 18 19 23 1 16 20 21 23 1 16 22 25 26 2 3 5 10 16 2 3 6 8 13 2 3 11 18 25 2 3 12 17 21 2 3 14 19 26 2 3 15 20 27 2 4 5 8 9 2 4 6 12 13 2 4 14 16 24 2 4 14 22 23 2 6 9 10 12 2 7 11 17 20 2 7 12 18 26 2 7 14 21 27 2 7 15 16 23 2 7 15 19 25 2 7 15 22 24 2 8 13 17 19 2 8 13 18 27 2 8 13 20 26 2 8 13 21 25 2 11 12 19 27 2 11 13 16 22 2 11 13 23 24 2 11 15 21 26 2 12 14 20 25 2 14 15 17 18 3 4 6 7 8 3 4 7 9 10 3 4 13 16 24 3 4 13 22 23 3 5 6 10 14 3 5 9 12 15 3 7 8 17 18 3 7 8 19 27 3 7 8 20 25 3 7 8 21 26 3 8 15 16 22 3 8 15 23 24 3 11 12 16 23 3 11 12 20 26 3 11 12 22 24 3 11 13 21 27 3 11 15 17 19 3 12 13 19 25 3 12 14 18 27 3 13 14 17 20 3 13 15 18 26 3 14 15 21 25 4 5 6 10 15 4 5 9 11 14 4 5 10 12 13 4 6 8 11 14 4 7 12 16 22 4 7 12 23 24 4 8 13 16 23 4 8 13 22 24 4 11 15 16 24 4 11 15 22 23 4 17 18 20 27 4 17 19 20 21 4 17 25 26 27 4 18 19 21 27 4 18 19 25 26 4 20 21 25 26 5 6 7 9 13 5 6 16 17 26 5 6 16 25 27 5 7 8 10 11 5 9 17 22 23 5 9 22 25 26 5 10 17 24 27 5 10 18 19 22 5 10 20 21 22 5 10 24 25 26 5 16 18 20 24 5 16 19 21 24 5 17 18 21 23 5 19 20 23 27 6 7 14 16 24 6 8 9 10 11 6 9 17 23 27 6 9 23 25 26 6 10 16 18 21 6 10 16 19 20 6 12 13 14 15 6 17 22 24 25 6 18 19 23 24 6 20 21 23 24 6 22 24 26 27 7 11 12 21 25 7 11 13 19 26 7 11 14 22 23 7 11 15 18 27 7 12 13 20 27 7 12 14 17 19 7 13 14 18 25 7 13 15 17 21 7 14 15 20 26 8 11 14 17 21 8 11 14 18 26 8 11 14 19 25 8 11 14 20 27 8 12 14 16 24 8 12 14 22 23 8 12 15 17 20 8 12 15 18 25 8 12 15 19 26 8 12 15 21 27 9 10 13 14 15 9 10 16 17 25 9 10 16 26 27 9 10 18 20 23 9 10 19 21 23 9 16 18 20 21 9 16 19 20 22 9 18 19 20 24 9 18 21 22 24 10 17 22 23 26 10 22 23 25 27 11 12 13 17 18 11 13 15 20 25 12 13 14 21 26 13 14 15 19 27 14 16 22 23 24 .......................... Quote Link to comment Share on other sites More sharing options...
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