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A mesmerising tour through fractal space. Switch to fullscreen HD if you can. Created with Mandelbulb3D
You're reading: Posts By Christian Lawson-Perfect
- Our piece on the Invariant Subspace Problem (and the more recent news)
- Log-log! Who’s there? Not a power law!
- Our coverage of the new Mersenne Prime news, and our meta-coverage of everyone else’s coverage of it
- The good, the bad, and Gowers
- Interesting comments discussion on the ‘What is a mathematician’ post
- The first in Katie’s series of Open Season posts, on Singmaster’s Conjecture
- Please consider hosting the Carnival of Mathematics
- Mysterious upcoming project – watch this space
- how statistics impacts individual lives, improves society, or in general makes the world more a better place
- how statistical thinking can be brought to bear on important issues of our day
- interesting careers in statistics (tell the world why your job in statistics is a great job, or why it is interesting and fun to be a statistician)
The New Mathblogging.org
A couple of weeks ago, our chums slash competitors ((Not really, they’re just chums.)) at mathblogging.org relaunched their website. They’re now using the much fancier ScienceSeeker.org software and it looks really good.
Aperiodcast – 11/02/2013
Two days late, because that is the way we rotate here, it’s another episode of our sporadic navel-gazing podcast.
In this episode we talked about:
Podcast: Play in new window | Download
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Talk: Computability of Bass-Serre structures in the Grzegorczyk hierarchy
I’m going to abuse this here organ of mine ((phrasing?!?!)) to show off a thing I did yesterday.
My chum the inimitable David Cushing has started a postgrad pure maths seminar at Newcastle. Because there are only a few pure postgrads here, he asked me to give a talk about the stuff I was looking at for the PhD I gave up on last year.
The title of the talk was “Computability of Bass-Serre structures in the Grzegorczyk hierarchy”. It gave an outline of everything needed to show that the fundamental group of a graph of groups is computable in a level of the Grzegorczyk hierarchy at most one higher than its constituent parts, and what that means.
The slides, a recording of the talk, and a link to my presentation template are in a post on my mathem-o-blog: Talk: Computability of Bass-Serre structures in the Grzegorczyk hierarchy
The invariant subspace problem is still a problem
Recently we reported that Eva Gallarda and Carl Cowen had announced they had a proof of the invariant subspace conjecture for Hilbert spaces.
Well, yesterday they announced at the blog Café Matemático that there was a problem with their proof:
International Year of Statistics Video Contest
In case you’d already forgotten, 2013 is the International Year of Statistics (I had; turns out Katie told us about it just after the New Year). One of the many activities going on is a video contest sponsored by the publishers Wiley.
Take it away, Wiley!
We invite videos of four minutes in length or less that illustrate
Prizes of $250 to $1000 will be awarded for the best videos, with special prizes for “the best videos by a person or persons 18 years of age or less and the best non-English language videos”.
Submissions must be received by February the 28th, so get rolling.
More information
Éditions Hermann donates its Bourbaki archives to the Bibliothèque nationale de France
A collection of material pertaining to Nicolas Bourbaki, author of the famous Elements of Mathematics, has been donated to the French national library by his publisher, éditions Hermann. Bourbaki set out to reframe modern maths in terms of set theory, to give the subject a coherence that would lead to more rigour and cross-application of results.
The donated material consists of “original texts, corrected proofs of the Elements of Mathematics, as well as various items related to the publication of the books including catalogues, press releases, contemporary journal articles on Bourbaki, and letters.”
More information (all in French)
Les éditions Hermann font don d’archives Nicolas Bourbaki à la Bibliothèque nationale de France – (PDF) press release from the BNF and Hermann.
Les Archives Bourbaki à la BNF – potted history of Bourbaki in Libération.
Nicolas Bourbaki fait son entrée à la BNF! – hour-long radio programme on France Culture, including contributions from Pierre Cartier, former avatar of Bourbaki, and Guillaume Fau, curator of manuscripts at the BNF.
Nicolas Bourbaki entry on MacTutor (in English)