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Archive of posts filed under the Talks category.

Cyclotomic Matrices and Graphs: Waterloo

I gave the Number Theory Seminar at the Department of Pure Mathematics, University of Waterloo on Thursday, September 8th. My slides are available in presentation or handout form (except the latter is missing the interlacing demo which didn’t render into individual slides correctly). I used this talk as an opportunity to present some results that [...]

Cyclotomic Matrices and Graphs: Warwick

I’m continuing to tour my Cyclotomic Matrices and Graphs talk; today I presented it at the University of Warwick. Here’s the latest and greatest iteration of the slides, mostly unchanged except for the current state of the computer search for minimal noncyclotomics of at most ten vertices. I’d hoped to finish that this month, but [...]

Talks on Cyclotomic Matrices and Graphs

I’m speaking this afternoon at the Heilbronn Seminar in Bristol: my slides are available here. This is essentially (up to permutation, and modulo errors!) the talk I gave at Royal Holloway in October, although the last few slides have been replaced with a result I’ve found since then. I try to avoid technical details of [...]

Bristol (and beyond?)

It’s almost September, although I’m not entirely sure how: feels like I’ve just started at Bristol, yet today marks three months here! So I’ve signed up for a couple of local events in September: the Heilbronn annual conference 2010 is on the 16-17th, and Engage 2010 is the following week, on the 23rd. Less concretely, [...]

Workshop on Discovery and Experimentation in Number Theory

I’m back from the Fields Institute in Toronto, where I spoke at the above workshop, on my usual topic of cyclotomic and 4-cyclotomic matrices/graphs. During the talk I described my conjecture that a graph is maximal cyclotomic if-and-only if it’s 4-cyclotomic, and after an hour at the blackboards with James McKee I now have a [...]

Geometry Club Talk: Why Cryptography Doesn’t Guarantee Security

Tomorrow, in what seems to be becoming an annual tradition, I’ll be giving a talk on cryptography at the Geometry Club. Since it’ll be a talk-and-chalk style seminar, I don’t have any slides to make available, but many of the topics I’ll be discussing have appeared earlier on this blog or everything2. In particular, I’m [...]

MAGIC Talk

Slides for a talk on cyclotomic matrices/graphs given at the MAGIC conference in Manchester.

Colloquium Talk

Slides from a colloquium I gave on public key cryptography.

Geometry Club Talk: Computational aspects of ECDLP

Notes from my geometry club talk given April 18th, 2008.

The Mathematics of Being Nice

Talk for the postgraduate colloquia series