bio | website | cs.ox.ac.uk/people/… |
---|---|---|
location | Oxford, United Kingdom | |
age | 51 | |
visits | member for | 4 years, 1 month |
seen | 12 hours ago | |
stats | profile views | 1,865 |
Dec 14 |
comment |
finding permutation matrix I which minimizes TRACE( I* C*( I^T)* D) matrix
well, there was a lot of research done on this problem. it would not be necessary to check a fraction of all permutations of n symbols, but still nobody knows how to check less than exponentially (in terms of n) many of them. |
Dec 13 |
answered | finding permutation matrix I which minimizes TRACE( I* C*( I^T)* D) matrix |
Dec 12 |
comment |
Dihedral subgroups of $\mathrm{PSL}_2(\mathbb{F}_q)$
IMHO this is already in L.Dickson's book "Linear Groups", which was reprinted by Dover in 1958. |
Dec 9 |
reviewed | Approve Real-world applications of mathematics, by arxiv subject area? |
Nov 26 |
awarded | Yearling |
Nov 25 |
awarded | Revival |
Nov 15 |
comment |
Can any bounded area defined by polynomial inequality in $\mathbb{R}^n$ be partitioned into simply connected finite area such that
it is well-known that any semialgebraic set can be triangulated. The question you ask seems like a particular case of this fact. |
Nov 9 |
answered | Polynomial-time algorithm for determining whether a polynomial is positive on $\mathbb{N}$ |
Oct 28 |
reviewed | Approve Minimize distance between centroids of subsets of points |
Oct 24 |
comment |
A number array related to colored necklaces and the primes
A059966 features a reference to a paper by me, and in fact I am well-aware of this relation. :-) |
Oct 23 |
comment |
A number array related to colored necklaces and the primes
although I don't see an immediate connection. |
Oct 23 |
comment |
A number array related to colored necklaces and the primes
oeis.org/A001037 is another related sequence, although a |
Oct 16 |
comment |
Is there an English translation of Minding's 1839 paper?
Assuming it's no coincidence that you have a Dutch name, you certainly can read German without needing to look in a dictionary too much; just try;-) The harder part will be to convert the text to modern terminology, but this equally applies to other languages. |
Oct 16 |
comment |
For a Sum-of-Squares cost functions J(x) is it true that J(x)-j* is also SOS?
oh, I just meant to say that in nonlinear least squares the structure of the problem is similar to yours. (And nonlinear least squares have received a lot of attention...) |
Oct 14 |
comment |
Thinnest 2-fold coverings of the plane by congruent convex shapes
this is about teh case when only translations are allowed: link.springer.com/article/10.1007/s00493-012-2860-3 |
Oct 14 |
comment |
For a Sum-of-Squares cost functions J(x) is it true that J(x)-j* is also SOS?
Nonlinear least squares problems have this kind of structure. en.wikipedia.org/wiki/Non-linear_least_squares |
Oct 14 |
revised |
For a Sum-of-Squares cost functions J(x) is it true that J(x)-j* is also SOS?
nothing to do with group theory IMHO |
Oct 14 |
revised |
For a Sum-of-Squares cost functions J(x) is it true that J(x)-j* is also SOS?
added 70 characters in body |
Oct 14 |
revised |
For a Sum-of-Squares cost functions J(x) is it true that J(x)-j* is also SOS?
a typo |
Oct 14 |
comment |
For a Sum-of-Squares cost functions J(x) is it true that J(x)-j* is also SOS?
it works for a different dehomogenesation, cf. my edited answer. |