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| bio | website | |
|---|---|---|
| location | Cambridge, United Kingdom | |
| age | ||
| visits | member for | 2 years, 10 months |
| seen | yesterday | |
| stats | profile views | 450 |
Researcher in quantum information --- involving algebras over finite dimensional Hilbert spaces, graphs and combinatorics, and vector spaces over ℤ/pℤ.
I habitually edit and re-edit anything I write, as long as I have the time, interest, and ability. I should probably apologize for this tendency, but you will probably have to be satisfied with being warned about it instead.
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May 7 |
awarded | Caucus |
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Apr 25 |
comment |
An inequality of moments (bounding the probability of events which differ from all preceeding events) @Did: done. It seems that it doesn't pay to write very quickly. |
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Apr 25 |
revised |
An inequality of moments (bounding the probability of events which differ from all preceeding events) corrected errors |
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Apr 25 |
answered | An inequality of moments (bounding the probability of events which differ from all preceeding events) |
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Apr 25 |
comment |
An inequality of moments (bounding the probability of events which differ from all preceeding events) @Did: right you are; that's the sort of simple approach which was eluding me. |
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Apr 25 |
revised |
An inequality of moments (bounding the probability of events which differ from all preceeding events) deleted 369 characters in body |
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Apr 25 |
asked | An inequality of moments (bounding the probability of events which differ from all preceeding events) |
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Mar 14 |
revised |
Crossing number of simple undirected graph Revised formatting, added tag |
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Mar 7 |
accepted | On the precise asymptotic scaling of $n!/(n-k)!$ as $n,k \to \infty$ |
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Mar 6 |
revised |
On the precise asymptotic scaling of $n!/(n-k)!$ as $n,k \to \infty$ fixed minor typo |
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Mar 6 |
comment |
On the precise asymptotic scaling of $n!/(n-k)!$ as $n,k \to \infty$ @AndrewUzzell: that's more or less what I thought, too. Mind you, if it's as trivial a formula as they imply (and it doesn't seem as though it should be too hard to prove in principle if correct, right?) then it shouldn't be too hard to show it, and possibly discover that the value of the exponent plays a particular role. |
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Mar 6 |
asked | On the precise asymptotic scaling of $n!/(n-k)!$ as $n,k \to \infty$ |
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Feb 4 |
comment |
Paradox: increasing sequence that goes to $0$? @julian: no. Tomson's lamp is equivalent to adding and removing a single numbered ball infinitely often. However, if Tomson's lamp had infinitely many distinct switches which were turned on and off in the same order as the balls are added and removed above and the lamp were on iff at least one switch was in the on position, my analysis would indicate that at t=2 the lamp would be off (as all switches are in the off position). The identity of the switches, and the rule governing when the lamp is turned on, is important here. |
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Feb 1 |
comment |
Presentation of tree decompositions (and related concepts) in terms of continuous maps? Now crossposted to MathOverflow. |
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Jan 25 |
revised |
Presentation of tree decompositions (and related concepts) in terms of continuous maps? minor elaboration |
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Jan 25 |
revised |
Every group of order 203 with a normal subgroup of order 7 is abelian typo |
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Jan 25 |
asked | Presentation of tree decompositions (and related concepts) in terms of continuous maps? |
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Jan 17 |
comment |
What are some examples of sequences that have multiple limit points ? +1 --- for $\theta$ an irrational multiple of $\pi$, this is a particularly elegant example of a sequence with an uncountable number of limit (accumulation) points. |
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Dec 26 |
accepted | Unimodular matrices without stable sub-spaces of even weight? |
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Dec 24 |
comment |
When do counital coalgebras have a basis of grouplike elements? @QiaochuYuan: Is it because there's no criterion which suggests itself? The question is somewhat underdetermined, in that it admits uninformative answers; if the only answers that occur to you are trivial and uninformative, then perhaps the more meaningful answer is that there's no nice structure which captures this property. (Compare the situation between "What conditions characterize a field extension of $\mathbb R$ for which all polynomials factorize into linear factors?" versus the analogue for $\mathbb Q$; the latter lacks a good answer but the former has one in "$x^2+1$ factorizes".) |
