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wu :: forums    riddles    putnam exam (pure math) (Moderators: Eigenray, william wu, SMQ, towr, Icarus, Grimbal) requires some formal math training to understand Pages: 1 2 3 4 5  ...  16 Start new topic    Subject Started by Replies Views Last post An inequality acarchau 2 1071 Dec 15th, 2008, 3:30am by ThudnBlunder Sum of integers whose reciprocals sum to 1 Michael Dagg 4 7147 Dec 10th, 2008, 12:50am by towr Number of skew polyominos howard roark 9 5074 Dec 10th, 2008, 12:34am by towr A Beastly Number ThudnBlunder 14 1820 Dec 9th, 2008, 5:32pm by Eigenray tough number theory prob. « Pages 1 2 » LeoYard 26 3030 Nov 7th, 2008, 12:23pm by Michael Dagg help with a putnam question sarah9 2 4340 Nov 6th, 2008, 2:02pm by Eigenray Cubic Diophantine Equation Barukh 9 1497 Nov 4th, 2008, 11:11pm by Eigenray Dice sum divisibility Eigenray 6 2998 Oct 17th, 2008, 9:46am by william wu Proving Primality like Euler Barukh 5 1213 Sep 27th, 2008, 1:35am by Eigenray Can one connected set pass through another? ecoist 8 1081 Sep 26th, 2008, 3:13pm by Hippo Number problem « Pages 1 2 » NightBreeze 26 2685 Sep 25th, 2008, 1:56pm by NightBreeze for prime >3, sum_k=1^(p-1) 1 over k =0 mod p^2 4butipul2maro 2 1060 Sep 18th, 2008, 2:33pm by Eigenray Complete set wonderful 2 1211 Sep 16th, 2008, 4:09pm by wonderful (tanA)(tanB)(tanC) ThudnBlunder 4 10044 Aug 30th, 2008, 6:05am by l4z3r Integral Solutions l4z3r 6 1382 Aug 30th, 2008, 5:34am by l4z3r Limit of Integral ThudnBlunder 2 754 Aug 7th, 2008, 10:04am by Eigenray Limit of a Combinatorial Sum Michael Dagg 2 791 Aug 2nd, 2008, 8:38pm by Michael Dagg Inequality ThudnBlunder 2 688 Jul 13th, 2008, 3:02pm by Eigenray Cubic Congruences ThudnBlunder 3 710 Jul 12th, 2008, 2:37pm by Eigenray Interesting inequality wonderful 12 1238 Jul 4th, 2008, 2:26pm by wonderful Odd integration problem NightBreeze 2 819 Jun 24th, 2008, 10:03am by NightBreeze Prime power moments Aryabhatta 10 1031 Jun 20th, 2008, 2:38pm by Obob Barely compatible gatherings ecoist 4 1059 Jun 9th, 2008, 2:50pm by ecoist Proving Stokes' Theorem Marissa 3 4315 May 5th, 2008, 6:37pm by Eigenray SIGMAarctan(2/n^2) ThudnBlunder 7 1652 May 21st, 2008, 3:59am by william wu Sinc(x) ThudnBlunder 3 4667 May 20th, 2008, 1:44pm by william wu Common Eigenvector Condition william wu 9 5380 May 19th, 2008, 1:08pm by william wu Summation ThudnBlunder 10 1600 May 11th, 2008, 10:04am by towr matrix temporary 24 1926 Apr 24th, 2008, 7:42pm by Michael Dagg Help with an Arithmetic/algebra equation game uzo 2 3428 Apr 6th, 2008, 7:18am by towr Pages: 1 2 3 4 5  ...  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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