bio | website | cs.ox.ac.uk/people/… |
---|---|---|
location | Oxford, United Kingdom | |
age | 50 | |
visits | member for | 3 years, 8 months |
seen | yesterday | |
stats | profile views | 1,717 |
Jun 17 |
comment |
Kneser graphs eigenvalues
as the eigenvalues and their multiplicities are known, this seems to be a straightforward exercise. |
Jun 7 |
comment |
A semisimple group ring
perhaps you might want to edit the question to make it more "watertight"... |
Jun 5 |
comment |
System of quadratic complex equations
Thank you - I actually published in computer algebra. I read the question as a request for a symbolic procedure... |
Jun 4 |
comment |
System of quadratic complex equations
just as computer algebra systems do. E.g. by specifying Thom encoding, i.e. the signs of the derivatives at the root. |
Jun 3 |
comment |
System of quadratic complex equations
the question explicitly says "without using a numerical method". |
Jun 1 |
comment |
Elements of finite order of $\mathrm{PGL}(n,\mathbb{Q})$
there seems to be a lot known about finite subgroups of $GL_n(\mathbb{Q})$, cf. e.g. references in ams.org/journals/proc/1997-125-12/S0002-9939-97-04283-4/… E.g. each of them is conjugate to one in $GL_n(\mathbb{Z})$. |
Jun 1 |
revised |
$LCM(q-1,\cdots,q^n-1)=q^{\frac{3}{\pi^2} n^2+o(n)}$
fixed typo in the subject line, making it nonsense |
Jun 1 |
revised |
On the Positive Definiteness of a Linear Combination of Matrices
the previous editor removed that 0 there by mistake. |
May 31 |
comment |
System of quadratic complex equations
the conditions $|x_k-1|\leq 1$ make this a system of quadratic equations and (quadratic) inequalities. |
May 26 |
revised |
Solving a quadratic matrix equation with non-squared matrix
corrected nonsense |
May 26 |
revised |
Solving a quadratic matrix equation with non-squared matrix
to address the changes in the question |
May 26 |
answered | Solving a quadratic matrix equation with non-squared matrix |
May 26 |
comment |
What is the generic complexity of First Order Predicate Calculus?
I guess most of the people here, myself included, have no idea about generic complexity. Care to elaborate? |
May 25 |
comment |
Existence of a real eigenvalue
it would help a lot if you spend few minutes typesetting entries in a readable way: e.g. the diagonal entry $M_{i+1,i+1}=1+4i-i^2-2n$ for all $i$ between 0 and $n-1$. |
May 25 |
comment |
Correct spelling of names, Chebychev and Cholesky
@KConrad: as I used to speak reasonably good Dutch, I don't think I can be scared by phonetics any more. :-) |
May 22 |
comment |
Correct spelling of names, Chebychev and Cholesky
Well, I can only say that English can't be a model example of "how to spell". It's more of "how to spell so that no-one without insider info will be able to pronounce correctly". :–) |
May 22 |
answered | Correct spelling of names, Chebychev and Cholesky |
May 22 |
comment |
Correct spelling of names, Chebychev and Cholesky
there can't be any conclusive answer, as for different languages using Latin alphabet you get different spelling. In different times in Russia/USSR different rules regarding transliteration were in place; it used to be German, French, English (presently). Then there is a en.wikipedia.org/wiki/ISO_9 which stipulates the transliteration "Čebyšëv". |
May 20 |
revised |
doubly-stochastic isomorphisms of graphs
added an explanation for Petersen graph |
May 20 |
revised |
doubly-stochastic isomorphisms of graphs
corrected the definition of $A$ |