POW-1: Sune Kristian Jakobsen, Philipp Lampe (Univ of Bonn), and Paul Shearer (Univ of Michigan).
POW-2: Sune Kristian Jakobsen, Philipp Lampe (Univ of Bonn), and Paul Shearer (Univ of Michigan). Solutions to part 1 given by Jimbo Doe, Jason Dyer, and Marni Sheppeard.
POW-3: Rod Carvalho, Jöel Duet, Philipp Lampe (Univ of Bonn), Gantumur Tsogtgerel (UC San Diego), and Nilay Vaish.
POW-4: David Eppstein, Sune Kristian Jakobsen, and Philipp Lampe (Univ of Bonn).
POW-5: Balkrishna Patankar, Akhil Ravidas, Animesh Datta (Univ of New Mexico), Philipp Lampe (Univ of Bonn), Kenneth Chan, and Nilay Vaish.
POW-6: No entries.
POW-7: Kenneth Chan (Univ. of New South Wales), Arin Chaudhuri, Sune Kristian Jakobsen, Philipp Lampe (Univ of Bonn), Peter LeFanu Lumsdaine (Carnegie Mellon University), Paul Shearer (Univ of Michigan).
POW-8: Arin Chaudhuri, Sune Kristian Jakobsen, Nilay Vaish.
POW-9: Arin Chaudhuri, Ashwin Kumar, Philipp Lampe (Univ of Bonn), Vladimir Nesov, Américo Tavares, Nathan Williams, Henry Wilton.
POW-10: Arin Chaudhuri, Philipp Lampe (Univ of Bonn), Paul Shearer (Univ of Michigan), Simon Tyler, Nilay Vaish.
POW-11: Philipp Lampe (Univ of Bonn).
POW-12: Arin Chaudhuri, David Eppstein, Sune Kristian Jakobsen (Univ of Copenhagen), Philipp Lampe (Univ of Bonn).
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May 13, 2008 at 12:09 pm
P1: An “elementary” divisibility problem « Todd and Vishal’s blog
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May 14, 2008 at 5:52 pm
POW-2: Diagonal slicing through squares « Todd and Vishal’s blog
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June 27, 2008 at 2:52 am
POW 6: Tiling with Triominoes « Todd and Vishal’s blog
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February 11, 2010 at 1:53 pm
Problem-solving-skill
You are very adept at solving problems
thanks
December 27, 2010 at 11:23 am
seo discussion
can you describe a bit longer in your next post
April 17, 2011 at 10:08 am
Mathmdmb
$y^2+xy+1|x^2+xy+1\implies y^2+xy+1|x^2-y^2$ but note that $gcd(x+y,y(x+y)+1)=1$. So $y^2+xy+1|x-y$ but since $|x-y|<y^2+xy+1,$ it easily follows that $x-y=0$ i.e. $x=y$
January 2, 2011 at 6:28 am
2010 in review « Todd and Vishal’s blog
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April 10, 2019 at 11:24 am
prof dr mircea orasanu
these are very important observed prof dr mircea orasanu and prof drd horia orasanu with followed