Per Vognsen

http://mathoverflow.net/users/2036

top accounts reputation activity subscriptions

Geometric interpretation of characteristic polynomial

linear-algebra matrices invariant-theory traces asked Jul 27, 2010 at 6:36

mathoverflow.net

35 votes

When is a symplectic manifold equivalent to a cotangent bundle?

sg.symplectic-geometry differential-topology mp.mathematical-physics asked Aug 17, 2010 at 19:44

mathoverflow.net

19 votes

Conceptual explanation of Strassen's trick for matrix multiplication

algorithms noncommutative-rings asked Sep 23, 2012 at 21:03

mathoverflow.net

15 votes

Associative hash mixing

ds.data-structures cr.crypto-security functional-programming hash-function asked Sep 26, 2010 at 9:20

cstheory.stackexchange.com

13 votes

Reference for fundamental theorem on tree rotations

reference-request ds.data-structures asked Sep 23, 2010 at 11:44

cstheory.stackexchange.com

11 votes

Cubical cohomology and de Rham cohomology

at.algebraic-topology ag.algebraic-geometry dg.differential-geometry hodge-theory asked Jul 28, 2010 at 6:44

mathoverflow.net

6 votes

Bijective proof of weak form of Stirling's approximation

co.combinatorics computer-science asked Aug 2, 2010 at 4:40

mathoverflow.net

6 votes

Proving equality of varieties by dimension counting

linear-algebra ag.algebraic-geometry asked Jul 30, 2010 at 3:18

mathoverflow.net

Top Answers

Algorithms from the Book

cstheory.stackexchange.com

Thinking and Explaining

mathoverflow.net

What papers should everyone read?

cstheory.stackexchange.com

Intuition behind conjugation in group theory

math.stackexchange.com

What is the Volume of Information?

cstheory.stackexchange.com

What are the outstanding questions in purely functional data structures?

cstheory.stackexchange.com

Alternative proofs of Schwartz–Zippel lemma

cstheory.stackexchange.com

Are there other nice math books close to the style of Tristan Needham?

mathoverflow.net

Alternative proofs of Schwartz–Zippel lemma

cstheory.stackexchange.com

What is the best way to get a close-to-fair coin toss from identical biased coins?

cstheory.stackexchange.com

Jokes in the sense of Littlewood: examples?

mathoverflow.net

How can I visualize the nontrivial element of $\pi_4(S^3)$ and $\pi_5(S^3)$ ?

mathoverflow.net

What videos should everybody watch?

cstheory.stackexchange.com

Communication complexity for deciding associativity

cstheory.stackexchange.com

Are there alternatives to using polynomials in defining the different notions of efficient computation?

cstheory.stackexchange.com

Repeated Quine program

cstheory.stackexchange.com

eBook readers for mathematics

mathoverflow.net

Expected Halt Time

cstheory.stackexchange.com

Book on symplectic geometry

mathoverflow.net

Show that trace is a unique linear functional

math.stackexchange.com

Which algorithms can be expressed using a total functional language with data parallel operators?

cstheory.stackexchange.com

Multiplying n polynomials of degree 1

cstheory.stackexchange.com

How is rebalancing of DHTs handled in case of failure or addition of new node?

cstheory.stackexchange.com

Find the Discrete Pair of {x,y} that Satisfy Inequality Constriants

cstheory.stackexchange.com

Intuitive Proof of Cramer's Decomposition Theorem

mathoverflow.net

Enumeration given a product of primes

cstheory.stackexchange.com

Randomized algorithms using a stack

cstheory.stackexchange.com

Why linear algebra is fun!(or ?)

mathoverflow.net

Laplacian operator and relation to the Laplace Transform

mathoverflow.net