bio | website | cs.ox.ac.uk/people/… |
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location | Oxford, United Kingdom | |
age | 51 | |
visits | member for | 4 years, 4 months |
seen | 1 hour ago | |
stats | profile views | 2,090 |
Mar 11 |
comment |
Computer software for periods
is there a reason that one log has ||, while the other has not? |
Mar 11 |
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Experimenting with the spider relator
Should be easy to check, I suppose. |
Mar 10 |
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An infinite sum which approaches a geometric series
In the integral, I'd try to replace the part that causes the absence of a "nice" form by a simpler upper bound, e.g. taking first few terms of the Taylor expansion. |
Mar 9 |
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An infinite sum which approaches a geometric series
Did you try approximating it by an integral? |
Mar 9 |
reviewed | Approve If X is a quasiprojective variety with condition S_2, and if its normalization Y is Cohen-Macaulay, is X necessarily Cohen-Macaulay? |
Mar 6 |
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Matrices congruent to each other via a permutation
moreover, spectrum is a very weak invariant - it doesn't even distinguish trees, leave alone more general graphs. |
Mar 6 |
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Matrices congruent to each other via a permutation
well, as I said, it's a classical idea in the graph isomorphism agorithms (and obviously generalised to the weighted case). |
Mar 6 |
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Matrices congruent to each other via a permutation
canonical representatives are surely possible, they are just hard to find, apparently. See my answer for details. |
Mar 6 |
answered | Matrices congruent to each other via a permutation |
Mar 4 |
revised |
Fixed point property for the projectivization of manifold of fixed rank matrices
typo fix |
Mar 4 |
comment |
Optimization over symmetric polynomials
well, my answer was to highlight the fact that in a similar setting complexity of solving is much better than exponential. |
Mar 4 |
answered | Optimization over symmetric polynomials |
Mar 3 |
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Invariant subalgebra and dual torus for symmetric group
still, it's not clear how $\mathcal{S}_3$ acts on your ring. It looks strange that it permutes generators and coefficients at the same time. |
Mar 3 |
comment |
Invariant subalgebra and dual torus for symmetric group
what is that group you mean when you talk about "group ring algebra"? (every group algebra is a group ring, by the way) |
Mar 3 |
reviewed | Approve Classification of PDE |
Mar 2 |
comment |
Approximation of convex body by polytopes
The paper you cite was published in 1975. This is not called "recent", IMHO... |
Mar 2 |
reviewed | Close Does SL(3,q) have a subgroup of order $q^3.(q^3-1)$ |
Mar 2 |
reviewed | Close Question about of comeager set |
Mar 2 |
reviewed | Approve How to prove this Poincare Inequality |
Mar 1 |
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Solving a set of equations in a finite symmetric group
Could you give an example of your equations? E.g., can you have constants in your equations, i.e. something like $x_1^{i_1} a_1 x_2^{i_2} a_2...=1$, with $i_1$ fixed integers, $a_i$ fixed elements of $S_n$, and $x_i$ - variables? |