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wu :: forums    riddles    putnam exam (pure math) (Moderators: SMQ, Grimbal, Icarus, william wu, Eigenray, towr) requires some formal math training to understand Pages: 1 ... 4 5 6 7 8  ...  16 Start new topic    Subject Started by Replies Views Last post Automorphisms of Rationals william wu 20 3883 May 28th, 2007, 2:22pm by Grimbal A condition for sides of triangle Aryabhatta 8 1109 May 25th, 2007, 9:43am by Aryabhatta Center of a finite group Michael Dagg 7 2083 May 21st, 2007, 9:34pm by Michael Dagg Probability... Surprising Answer. Johan_Gunardi 1 798 May 20th, 2007, 11:20pm by towr Unique subgroup of a finite group Michael Dagg 5 1040 May 18th, 2007, 12:22pm by Michael Dagg John Thompson's Lemma Revisited ecoist 7 2186 May 14th, 2007, 11:57pm by Eigenray Permutation groups where only 1 fixes two letters ecoist 6 807 May 10th, 2007, 10:33am by Obob Square Root, Floor, and Factorial ThudnBlunder 4 1614 Apr 30th, 2007, 12:00pm by ThudnBlunder wine and water skogen 7 832 Apr 30th, 2007, 4:44am by JiNbOtAk Another sequence puzzle Obob 3 1007 Apr 21st, 2007, 11:06pm by Obob Trimming trees for fractal fun ecoist 6 770 Apr 15th, 2007, 11:58am by ecoist Given subgroup H maximal non-normal in some group? ecoist 1 758 Apr 12th, 2007, 4:29pm by Eigenray Rank of Redheffer Matrix Aryabhatta 3 1232 Apr 12th, 2007, 3:48pm by Eigenray Radicals ThudnBlunder 11 839 Apr 4th, 2007, 10:49am by Barukh Convergent Series ThudnBlunder 2 703 Apr 2nd, 2007, 5:05pm by Icarus Not just one triangle forced by many edges ecoist 18 3451 Apr 1st, 2007, 3:23pm by ecoist Char poly of binomial matrix « Pages 1 2 » Eigenray 31 3354 Mar 30th, 2007, 7:07pm by Eigenray Re: Polyhedron faces anant 6 940 Mar 27th, 2007, 11:42pm by anant Mathematicians Map E8 ThudnBlunder 1 563 Mar 22nd, 2007, 3:38pm by Icarus Abelian or nontrivial intersection? Michael Dagg 8 942 Mar 13th, 2007, 9:14pm by ecoist Polynomial Puzzle ThudnBlunder 1 862 Mar 9th, 2007, 11:31pm by Eigenray (0,1) Matrices ThudnBlunder 3 698 Mar 9th, 2007, 8:33pm by Eigenray Simple Combinatorics anonymous 7 681 Mar 8th, 2007, 8:11pm by ecoist Normal subgroups of Q_8 and a 2-group Michael Dagg 6 824 Mar 8th, 2007, 3:48pm by Eigenray Pigeonholing intervals ecoist 4 609 Feb 23rd, 2007, 3:43am by Eigenray Automorphism group of a directed graph. Obob 8 867 Jan 30th, 2007, 7:20pm by Icarus Sum of Matrices (9/3/2002) william wu 11 1172 Jan 25th, 2007, 4:08am by Eigenray Average condition implies sequence is constant « Pages 1 2 » ecoist 34 2317 Jan 16th, 2007, 9:54pm by ecoist Devil Matrix ecoist 17 1148 Jan 14th, 2007, 8:23pm by ecoist Expected Area of Triangle ThudnBlunder 7 1020 Jan 11th, 2007, 3:44pm by balakrishnan Pages: 1 ... 4 5 6 7 8  ...  16 Start new topic  Normal Topic Hot Topic (More than 15 Replies) Very Hot Topic (More than 25 Replies) Locked Topic Sticky Topic Sticky Locked Topic Forum Jump: ----------------------------- riddles -----------------------------  - easy   - medium   - hard   - what am i   - what happened   - microsoft   - cs => putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese

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