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user1551
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Top posts

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119
Looking for an intuitive explanation why the row rank is equal to the column rank for a matrix
Mar 17, 2013
64
On the functional square root of $x^2+1$
Aug 30, 2010
58
If $A,B$ have eigenvalues $\pm1$, what can I say about the eigenvalues of $AB,BA$?
Mar 18, 2014
58
Can $\det(A + B)$ be expressed in terms of $\det(A)$, $\det(B)$, $n$?
Apr 29, 2014
50
Why does the $n$-th power of a Jordan matrix involve the binomial coefficient?
Mar 10, 2013
50
What was the first bit of mathematics that made you realize that math is beautiful? (For children's book)
Mar 7, 2013
49
How can I show that $\sqrt{1+\sqrt{2+\sqrt{3+\sqrt\ldots}}}$ exists?
Jul 6, 2013
48
Why can't the second fundamental theorem of calculus be proved in just two lines?
Oct 31, 2016
47
$2\times2$ matrices are not big enough
Nov 23, 2013
47
Is there a matrix of every size with all its submatrices invertible?
Aug 8, 2016

Top Meta posts

10
7
47
Bounties to reward not answers, but questions
33
Guerilla reposting of a question that no one answered
28
Which question on MSE has the most failed attempts?
23
Do people care about their answers being unaccepted when the OP decides to accept a different answer?
14
Is there a policy on links to Wikiwand (commercial Wikipedia interface)?

Top network posts

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104
Python defaultdict and lambda
40
Why are pin operators necessary in Ecto queries?
9
Two square matrices $A, B$ such that $A^k, B^k$ have identical diagonals for all $k$
9
Alternative proofs that two bases of a vector space have the same size
7
Git show's file path