8,672 reputation
21845
bio website quoll.uwaterloo.ca
location waterloo
age 66
visits member for 5 years, 10 months
seen 10 hours ago
Professor at University of Waterloo in C&O

2d
reviewed Close Permutations of given length
2d
reviewed Close “GraphI Individualization” referece request
Aug
24
reviewed Close Probability and Statistics
Aug
24
reviewed Close A question in numerical range of matrix polynomial
Aug
23
reviewed Close embbeing torus into compact lie group or inclusion torus into compact lie group
Aug
23
reviewed Close Arithmetical complexity of substitution method for solving systems of linear equations
Aug
22
reviewed Close Global minimization. How?
Aug
22
reviewed Close Positive-definite and positive semi-definite matrixes sum
Aug
22
reviewed Close Has anyone developed a technique to generate a polytope given (possibly redundant) inequality constraints?
Aug
21
comment Hedetniemi's conjecture for graphs with countable chromatic number
The people I know who have devoted serious attention to the finite version of Hedetniemi's conjecture seem to believe it is likely false.
Aug
19
awarded  Good Answer
Aug
19
comment Is there an algorithm to test whether a vector is an eigenvector of a power of a matrix?
I can't speak for the others who voted to close it. Certainly I was in error and have nominated the question for reopening.
Aug
18
comment Is there an algorithm to test whether a vector is an eigenvector of a power of a matrix?
My comment is wrong, sorry.
Aug
18
comment Is there an algorithm to test whether a vector is an eigenvector of a power of a matrix?
Compute the minimal polynomial relative to $x$. If it's $x^k$, you have an eigenvector for $A^k$.
Aug
18
reviewed No Action Needed Concerning the $SBI$-sequence for dihedral homology (Loday, Cyclic Homology, 5.2)
Aug
18
reviewed No Action Needed Examples of (non-normal) unibranched rings?
Aug
18
reviewed Close Good broad review of agent-based modeling?
Aug
18
answered Integral roots of circulant matrix
Aug
17
reviewed No Action Needed Positive linear functionals on group algebras generated by one element
Aug
17
reviewed No Action Needed Orientability of Surfaces and the Fundamental Group