179:
158:
84:
74:
53:
22:
632:
I have hidden, but not removed, a recently added example of a BIBD. My concerns are that the table introduced statistical terminology without any explanation and it wasn't clear what the example was. A small example is a fine addition to the article, but this one needs more work before it is
293:, properly speaking, is a number.) The conventions of the field make the term "block design" the best one for an article (unless you prefer the long name, which is not as much used nowadays). I am open to being shown wrong on this, but my experience indicates that's what experts would say.
284:
I plan to move "T-design" back to "Block design". Please do not move it back to "T-design" (or "t-design"). The general term is "block design" or in full "balanced incomplete block design". A particular kind of block design is called a
526:
being predictable from the rest, but important to know. The reason they're important is that they have to do with the size of the design, which matters when you have to pay for it. (This notation suggests why one says "2-design" or
485:
229:
490:
My syllabus apparently backs me up on this formula. My question, why should this be included in the definition when it is abundant as it (apparently) can be calculated immediately from the rest
140:
367:
633:
presentable. Since this was computer generated, perhaps a subsection of applications could be added to talk about such generation and the fields in which it is useful. --
671:
219:
661:
130:
676:
318:
As usual with stuff concerning graph theory/combinatorics, conventions differ. in my syllabus it saids every 2-design is a block and vice versa
106:
656:
597:
563:
195:
666:
265:-element subsets. "Balanced" because every pair of elements (I'm referring to the main original designs, which were 2-designs) is in the
510:
is in the notation (not definition, though it could also be in the definition) is that it's important to know. Another notation is "
303:
Moved. Again, I ask people not to move this back to "T-design" without deep thought. If you object, let's discuss it and decide.
97:
58:
388:
186:
163:
554:
Currently, the article is "purely" Design-theoretic and is lacking a Coding Theory perspective. A case, for example, is an
33:
493:
My apologies if I am wrong, I am just a student and most of maths is still new to me, but I am very busy with it all.
383:
now the r defined here , is the number of blocks through one point x now some basic counting teaches me immediately :
601:
251:
I'd be grateful if anyone could explain why 'partial incomplete block design' is the terminology could add that.
555:
324:
254:
39:
83:
178:
157:
593:
572:
21:
194:
on
Knowledge. If you would like to participate, please visit the project page, where you can join
105:
on
Knowledge. If you would like to participate, please visit the project page, where you can join
638:
617:
89:
73:
52:
559:
568:
650:
634:
613:
261:
In full, "balanced incomplete block design". "Incomplete" because you don't use all
540:
497:
304:
294:
270:
102:
379:
through every subset of the point set with t elements there are \lambda blocks
191:
79:
587:
642:
621:
605:
576:
543:
500:
307:
297:
273:
15:
562:(v,k,λ)-design. If I'm not mistaken this is what is called a
480:{\displaystyle {v-1 \choose t-1}\lambda =r{k-1 \choose t-1}}
391:
327:
590:is currently broken. Is there any active database?
190:, a collaborative effort to improve the coverage of
101:, a collaborative effort to improve the coverage of
479:
361:
471:
442:
424:
395:
506:You meant "redundant", of course. The reason
8:
152:
47:
470:
441:
439:
423:
394:
392:
390:
332:
326:
588:http://batman.cs.dal.ca/~peter/designdb/
535:was an afterthought, originally, since
154:
49:
19:
564:Balanced incomplete block design code
550:Coding-theoretic applications missing
7:
184:This article is within the scope of
95:This article is within the scope of
558:whose codewords are the lines of a
376:the number of points on a line is k
362:{\displaystyle S_{\lambda }(t,k,v)}
38:It is of interest to the following
672:Mid-importance Statistics articles
539:= 2 was the main topic at first.)
446:
399:
14:
662:Mid-priority mathematics articles
321:But more importantly , it says :
115:Knowledge:WikiProject Mathematics
204:Knowledge:WikiProject Statistics
177:
156:
118:Template:WikiProject Mathematics
82:
72:
51:
20:
677:WikiProject Statistics articles
224:This article has been rated as
207:Template:WikiProject Statistics
135:This article has been rated as
356:
338:
1:
577:14:24, 26 November 2008 (UTC)
544:10:58, 26 February 2007 (UTC)
501:16:58, 15 February 2006 (UTC)
308:11:57, 26 February 2007 (UTC)
298:10:52, 26 February 2007 (UTC)
274:11:54, 26 February 2007 (UTC)
198:and see a list of open tasks.
109:and see a list of open tasks.
657:B-Class mathematics articles
643:19:40, 1 February 2017 (UTC)
667:B-Class Statistics articles
693:
622:02:41, 22 March 2013 (UTC)
606:12:30, 21 March 2013 (UTC)
373:the number of points is v
257:19:48, 19 Nov 2004 (UTC)
223:
172:
134:
67:
46:
141:project's priority scale
369:is a t-design , when :
98:WikiProject Mathematics
481:
363:
187:WikiProject Statistics
28:This article is rated
556:error-correcting code
482:
364:
389:
325:
121:mathematics articles
210:Statistics articles
477:
359:
269:number of blocks.
90:Mathematics portal
34:content assessment
596:comment added by
518:,λ) design", the
469:
422:
244:
243:
240:
239:
236:
235:
151:
150:
147:
146:
684:
635:Bill Cherowitzo
614:Bill Cherowitzo
608:
486:
484:
483:
478:
476:
475:
474:
468:
457:
445:
429:
428:
427:
421:
410:
398:
368:
366:
365:
360:
337:
336:
255:Charles Matthews
230:importance scale
212:
211:
208:
205:
202:
181:
174:
173:
168:
160:
153:
123:
122:
119:
116:
113:
92:
87:
86:
76:
69:
68:
63:
55:
48:
31:
25:
24:
16:
692:
691:
687:
686:
685:
683:
682:
681:
647:
646:
630:
598:193.144.198.250
591:
584:
552:
458:
447:
440:
411:
400:
393:
387:
386:
328:
323:
322:
316:
289:-design. (The
282:
249:
209:
206:
203:
200:
199:
166:
120:
117:
114:
111:
110:
88:
81:
61:
32:on Knowledge's
29:
12:
11:
5:
690:
688:
680:
679:
674:
669:
664:
659:
649:
648:
629:
626:
625:
624:
583:
580:
567:
551:
548:
547:
546:
531:-design"; the
496:Kind regards,
489:
473:
467:
464:
461:
456:
453:
450:
444:
438:
435:
432:
426:
420:
417:
414:
409:
406:
403:
397:
381:
380:
377:
374:
358:
355:
352:
349:
346:
343:
340:
335:
331:
315:
312:
311:
310:
281:
278:
277:
276:
248:
245:
242:
241:
238:
237:
234:
233:
226:Mid-importance
222:
216:
215:
213:
196:the discussion
182:
170:
169:
167:Mid‑importance
161:
149:
148:
145:
144:
133:
127:
126:
124:
107:the discussion
94:
93:
77:
65:
64:
56:
44:
43:
37:
26:
13:
10:
9:
6:
4:
3:
2:
689:
678:
675:
673:
670:
668:
665:
663:
660:
658:
655:
654:
652:
645:
644:
640:
636:
627:
623:
619:
615:
611:
610:
609:
607:
603:
599:
595:
589:
582:Database link
581:
579:
578:
574:
570:
565:
561:
557:
549:
545:
542:
538:
534:
530:
525:
521:
517:
513:
509:
505:
504:
503:
502:
499:
494:
491:
487:
465:
462:
459:
454:
451:
448:
436:
433:
430:
418:
415:
412:
407:
404:
401:
384:
378:
375:
372:
371:
370:
353:
350:
347:
344:
341:
333:
329:
319:
313:
309:
306:
302:
301:
300:
299:
296:
292:
288:
279:
275:
272:
268:
264:
260:
259:
258:
256:
252:
246:
231:
227:
221:
218:
217:
214:
197:
193:
189:
188:
183:
180:
176:
175:
171:
165:
162:
159:
155:
142:
138:
132:
129:
128:
125:
108:
104:
100:
99:
91:
85:
80:
78:
75:
71:
70:
66:
60:
57:
54:
50:
45:
41:
35:
27:
23:
18:
17:
631:
592:— Preceding
585:
553:
536:
532:
528:
523:
519:
515:
511:
507:
495:
492:
488:
385:
382:
320:
317:
290:
286:
283:
266:
262:
253:
250:
225:
185:
137:Mid-priority
136:
96:
62:Mid‑priority
40:WikiProjects
112:Mathematics
103:mathematics
59:Mathematics
651:Categories
569:Omnipedian
201:Statistics
192:statistics
164:Statistics
586:The link
560:symmetric
314:confusion
594:unsigned
628:Example
516:b,v,r,k
228:on the
139:on the
30:B-class
612:Done.
541:Zaslav
498:Evilbu
305:Zaslav
295:Zaslav
271:Zaslav
36:scale.
639:talk
618:talk
602:talk
573:talk
522:and
267:same
220:Mid
131:Mid
653::
641:)
620:)
604:)
575:)
566:.
514:-(
463:−
452:−
431:λ
416:−
405:−
334:λ
637:(
616:(
600:(
571:(
537:t
533:t
529:t
527:"
524:r
520:b
512:t
508:r
472:)
466:1
460:t
455:1
449:k
443:(
437:r
434:=
425:)
419:1
413:t
408:1
402:v
396:(
357:)
354:v
351:,
348:k
345:,
342:t
339:(
330:S
291:t
287:t
280:2
263:k
247:1
232:.
143:.
42::
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.