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Combinatorics Proposed & Own Problems

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Home » Olympiad Section » Combinatorics » Combinatorics Proposed & Own Problems

2308 Topics • Page 1 of 47 • 1, 2, 3, ..., 45, 46, 47 Next

Topics		Author	Replies	Views	Last Post
	Difference between numbers of elements in A-A and A+A Schweitzer 2009	dmitin	11	402	Today, at 2:51 pm Fedor Petrov
	Romania 2000 TST	CoBa_c_Kacka	0	74	Tue Nov 17, 2009 1:29 pm CoBa_c_Kacka
	1,2,...,20 on the blackboard Indonesia IMO 2010 TST, Stage 1, Test 4, Problem 1	Raja Oktovin	5	252	Mon Nov 16, 2009 10:18 pm gwy
	crow on regular n-gon Indonesia IMO 2007 TST, Stage 2, Test 5, Problem 3	Raja Oktovin	1	111	Sun Nov 15, 2009 8:24 pm pleurestique
	points and segments Indonesia IMO 2007 TST, Stage 2, Test 2, Problem 4	Raja Oktovin	1	95	Sun Nov 15, 2009 12:41 pm JBL
	calculating the summation Indonesia IMO 2007 TST, Stage 2, Test 1, Problem 4	Raja Oktovin	2	109	Sun Nov 15, 2009 9:49 am nsato
	Class representative voting Own	Johan Gunardi	2	248	Sun Nov 15, 2009 5:53 am Raja Oktovin
	subset of 100 integers	gwy	0	94	Sun Nov 15, 2009 3:57 am gwy
	squares and the family Indonesia IMO 2007 TST, Stage 2, Test 4, Problem 4	Raja Oktovin	0	73	Sat Nov 14, 2009 10:12 pm Raja Oktovin
	party but graph Indonesia IMO 2010 TST, Stage 1, Test 1, Problem 3	Raja Oktovin	1	170	Sat Nov 14, 2009 10:01 am Mashimaru
	Graph and prime numbers Schweitzer 2009	dmitin	1	136	Fri Nov 13, 2009 8:35 am Mashimaru
	Deck of cards and 17-gons Schweitzer 2009	dmitin	0	90	Fri Nov 13, 2009 2:26 am dmitin
	infinite squence own?	hxy09	2	142	Thu Nov 12, 2009 9:40 pm hxy09
	calculation of sum of 2^(f(n)) Indonesia IMO 2010 TST, Stage 1, Test 2, Problem 4	Raja Oktovin	3	186	Thu Nov 12, 2009 9:32 am pleurestique
	erasing some digits Indonesia IMO 2010 TST, Stage 1, Test 5, Problem 4	Raja Oktovin	0	126	Wed Nov 11, 2009 7:56 pm Raja Oktovin
	coloring the points Indonesia IMO 2010 TST, Stage 1, Test 3, Problem 2	Raja Oktovin	0	115	Wed Nov 11, 2009 5:31 pm Raja Oktovin
	Fitting a figure in a square	Scorpius	5	373	Wed Nov 11, 2009 4:15 pm Scorpius
	Croatian Mathematical Olympiad 2006 problem 4	yuyang	1	131	Wed Nov 11, 2009 8:24 am JBL
	Smallest value of m Baltic way 2009	uNc	0	134	Wed Nov 11, 2009 6:03 am uNc
	Number of subset with no adjacent cells	walrusvn	2	110	Tue Nov 10, 2009 8:01 pm walrusvn
	Operations on a matrix Romania TST 2009, Day 1, Problem 2	Maxim Bogdan	4	415	Mon Nov 09, 2009 12:35 pm kevinatcausa
	Mapping of interior points of spehere and circle An extremely good problem	Agr_94_Math	1	134	Mon Nov 09, 2009 12:22 pm JBL
	tetris covering	Peter	6	292	Mon Nov 09, 2009 4:23 am Peter
	points on a circle are painted	silouan	0	114	Mon Nov 09, 2009 3:42 am silouan
	KGB Agents!	pmvald	3	197	Sun Nov 08, 2009 11:07 pm mavropnevma
	How many are there?	mathVNpro	2	142	Sun Nov 08, 2009 4:46 pm mathVNpro
	Prove that one of the real nos. differ by 1/n from integer	Agr_94_Math	3	223	Sat Nov 07, 2009 11:41 am Mashimaru
	A set problem	Mashimaru	1	132	Sat Nov 07, 2009 11:23 am mavropnevma
	New Problem ..........	Pirkuliyev Rovsen	1	161	Thu Nov 05, 2009 9:17 am JBL
	Game with coins	eugene	0	136	Thu Nov 05, 2009 7:06 am eugene
	Is this proof correct?	mozilla	1	144	Wed Nov 04, 2009 11:06 pm mavropnevma
	Partition of 2^(n+1) element set with specific properties	Agr_94_Math	1	147	Tue Nov 03, 2009 8:25 am mavropnevma
	permutations with a coding theoretic flavour	Peter	3	279	Sun Nov 01, 2009 7:41 am JBL
	Table 9 x 2008 Federation of Bosnia, 3. and 4. Grades 2008.	delegat	5	947	Sat Oct 31, 2009 8:58 am mahanmath
	A permutation with different residues modulo n Going from number theory	bboypa	2	179	Fri Oct 30, 2009 6:20 pm bboypa
	Society X Moldova TST 2009 Day 4 problem 4	Ahiles	3	636	Thu Oct 29, 2009 6:12 pm huang
	Polynomial expansion (need help)	adinh	5	417	Wed Oct 28, 2009 6:56 pm adinh
	Convolution free words of length n Romania TST 2002	Agr_94_Math	1	169	Wed Oct 28, 2009 7:31 am mavropnevma
	balancing the stones 6-th Kyiv math festival, 2007	rogue	1	807	Wed Oct 28, 2009 3:51 am Rodolphe2005
	Problem from Ukrainian tournament	BlackMax	0	159	Wed Oct 28, 2009 3:31 am BlackMax
	A table 2n*2n	jin thynj	0	202	Mon Oct 26, 2009 6:28 am jin thynj
	Simple combinatoric	trieuquangtai93	6	405	Sun Oct 25, 2009 12:01 pm mavropnevma
	My own problem Quadrangles	Bachukas	3	359	Sun Oct 25, 2009 10:43 am Arachnotron
	Covering 10x10 square board Covering 10x10 square board with triminos	ogurlu	3	314	Sun Oct 25, 2009 7:06 am selmanfarisi
	Triples	Thjch Ph4 Trjnh	1	205	Thu Oct 22, 2009 10:14 pm mavropnevma
	Graph	Johan Gunardi	0	191	Thu Oct 22, 2009 8:04 pm Johan Gunardi
	Combinatorics or algebra?	hendrata01	1	228	Thu Oct 22, 2009 2:15 pm JBL
	Coloring 6000 points using 10 colors Iberoamerican Olympiad 2009, problem 6	Jutaro	3	887	Thu Oct 22, 2009 1:43 pm makmat
	Minumum difference of sums ISL 2007, C4, AIMO 2008, TST 3, P1	Omid Hatami	3	1510	Thu Oct 22, 2009 9:12 am bearkiller
	n point in a circle with radius =1	stvs_f	4	456	Wed Oct 21, 2009 8:00 pm v235711
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2308 Topics • Page 1 of 47 • 1, 2, 3, ..., 45, 46, 47 Next

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