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David Roberts
Works at NCVER
Lives in Adelaide, Australia
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David Roberts

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John Nash's Final Interview

"I am a little cautious about my efforts when I try to attack some problem because the problem can attack back, so to say."

John Nash spoke to the Danish, Norwegian and European Mathematical Societies on the occasion of receiving the Abel Prize, five days before he and his wife Alicia tragically died in a car crash. The interview is online now, in the latest edition of the EMS Newsletter (page 26):
http://www.ems-ph.org/journals/newsletter/pdf/2015-09-97.pdf#page=28
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Bravo to +David Butler on his well-deserved promotion! Fano (pictured) is delighted!
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Saw an article in the (physical) newspaper about this. Their previous work [1] about teachers is good to take note of, too

http://dx.doi.org/10.1177/0956797615592630

#mathed   #mathematicseducation #paywall

[1] Sian L. Beilock, Elizabeth A. Gunderson, Gerardo Ramirez, and Susan C. Levine, Female teachers’ math anxiety affects girls’ math achievement, PNAS February 2, 2010 vol. 107 no. 5 1860-1863, http://dx.doi.org/10.1073/pnas.0910967107 (open access)
Abstract A large field study of children in first and second grade explored how parents’ anxiety about math relates to their children’s math achievement. The goal of the study was to better understand why some students perform worse in math than others. We tested whether parents’ math anxiety predicts their children’s math achievement across the school year. We found that when parents are more math anxious, their children learn significantly less...
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I don't know if I believe in maths homework at all, at least in primary school. If anything, I'd prefer it was only things the child already knew that they were reinforcing rather than stuff they might need help with.
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This is a cool approach! Also, the relation between the Golay code and the Leech lattice is explained in a nice conceptual way at the link:

Take the integer lattice Z^24 in R^24 and consider the projection map to (Z/2)^24. The (extended) Golay code is a subspace of this latter vector space. The Leech lattice, according to the page linked below, is the inverse image of this subspace!

This makes connections between the Mathieu group M_24 and the Conway group Co_0, which are the automorphism groups of the Golay code and the Leech lattice respectively, much clearer, for me at least.

#finitegroups #mathematics  
 
I figured out a way to understand Golay codes, and their relation to the Leech lattice, M24, and the Klein Quartic. I just completed this website: http://westy31.home.xs4all.nl/Golay/GolayCodeAndSymmetry.html
Golay codes are used in space communication to as a way to send data with built-in error correction.
You can construct the Golay code by imagining 12 data bits on the respective 12 pentagonal faces of the great dodecahedron. Then on each of the 12 vertices, put a parity bit that is the parity sum over all face bits that are not connected to the vertex. That's it! Note that there are 7 of these faces, and each of the 12 faces has 7 parity bits related to it, so there is th 24-7 connection to the Klein Quartic.
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[...]THE FIRST thing that people invariably notice about Felicia Maria “Shasha” Magpantay is that she looks like she barely got out of high school. But this young-looking 28 year old has already racked up an impressive curriculum vitae in the academic field. Consider this: a Ph.D. in Applied Mathematics from McGill University in Montreal, Canada,  [...] And just this August, Shasha became the first Filipino woman to join the Department of Mathematics as a tenure-track professor at the research-intensive University of Manitoba. Not bad for a little girl who had initially considered a career as a ballerina.
THE FIRST thing that people invariably notice about Felicia Maria “Shasha” Magpantay is that she looks like she barely got out of high school. But this young-looking 28 year old has already racked
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Thanks, +Bruce Elliott , I suspected something like that.
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This is sad, but Unibooks is only one-third the size it was when I started at Adelaide: they moved from a multi-storey format into a single floor a few years back. Their physics and mathematics sections took a huge hit in the downsize.

http://www.abc.net.au/news/2015-08-26/unibooks-closure-to-hit-more-than-100-jobs/6727648

#adelaide  
More than 100 jobs will go with the closure of Unibooks, the Adelaide supplier of study materials for SA's three public universities.
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+Kevin Clift : I love Foyles! More or less every time I am in London I go there :-)
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David Roberts

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Sadly there doesn't yet seem to be a trailer for The Man Who Knew Infinity. I'm glad they got some serious mathematical input to train the actors, though, and looking forward to seeing the delivery of the principals.
 
Every field has its rock stars. In math, Professor Ken Ono is one of the brightest.
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The smallest pumpkin you ever did see!
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Or the biggest hand.
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Bit of excitement at work...

#adelaide #fire
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oh my!
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We should have some of these for maths journals:

http://ineed.coffee/tag/journal-review/

Sadly, my experiences with the platform that Springer (one of the major mathematics publishers) uses have never been pleasant.
Given the general appreciation forx my small series of author-based reviews of academic journals, I will now report my experience with PeerJ Computer Science. PeerJ Computer Science is the second journal launched by the academic publisher of the PeerJ journal, which is called PeerJ, ...
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+John Baez I agree.
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Lawvere's Hegelian taco

Compare to the 'Monads are like burritos' meme [1].

Source: F.W. Lawvere, Display of graphics and their applications, as exemplified by 2-categories and the Hegelian “taco”, Proceedings of the first international Conference on algebraic methodology and software technology University of Iowa, May 22-24 1989, Iowa City pp. 51-74

[1] https://byorgey.wordpress.com/2009/01/12/abstraction-intuition-and-the-monad-tutorial-fallacy/
[2] http://chrisdone.com/posts/monads-are-burritos
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+Drew Armstrong thanks, fixed.
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From https://www.facebook.com/pratchett/posts/10152970826355025

Five things you need to know about The Shepherd’s Crown
1. It introduces a brand new character – young Geoffrey Swivel.
2. There is a devilish smart goat named Mephistopheles, who can count to twenty and use the privy.
3. Granny, Nanny, Magrat, Agnes, Petulia, Mrs Earwig, Long Tall Short Fat Sally and Miss Tick are all there. Along with a whole host of other much-loved characters.
4. It will make you see the humble Garden Shed in a whole new light.
5. An elderly gentleman’s toenails can be used as a powerful Feegle weapon.

Out this week!
Five things you need to know about The Shepherd’s Crown 1. It introduces a brand new character – young Geoffrey Swivel. 2. There is a devilish smart...
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I'm still hoping Weatherwax will die in this book. Would be a fitting end, I think.
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Have him in circles
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  • NCVER
    present
  • University of Adelaide
    2012 - 2015
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Mathematician, among other things.
Introduction
I live in Adelaide, Australia.

I am a pure mathematician who works on category theory and a smattering of related fields such foundations and higher geometry.

I works as a data analyst, of sorts, at the National Centre for Vocational Education Research (all views expressed here are my own).

I am a visiting fellow in the School of Mathematical Sciences at the University of Adelaide.

My nLab page: http://ncatlab.org/nlab/show/David+Roberts
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Adelaide, Australia
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