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# Tag Archives: statistics

## A matrix problem

Suppose you are given n linearly independent vectors in n-dimensional Euclidean space. You move the vectors so that each vector becomes longer, but their inner products remain the same. What happens to the volume of the parallelepiped they span? This … Continue reading

Posted in open problems
Tagged conference matrix, Dennis Lin, determinant, Hadamard matrix, Isaac Newton Institute, matrices, skew-symmetric, statistics
7 Comments

## Is my theory true?

Browsing through an old issue of Significance, the Royal Statistical Society glossy, I came upon an interesting article “Dicing with the unknown” by Tony O’Hagan, professor of statistics at Sheffield. It brought home to me something I hadn’t realised clearly … Continue reading

Posted in exposition
Tagged aleatory, Bayesian, epistemic, frequentist, p-value, statistics, uncertainty
3 Comments

## The ADE affair, 4

Here is a cautionary tale to show that not everything that looks like an instance of the ADE classification actually is so. When I first learned about optimal design in statistics, I was very excited to find that there are … Continue reading

Posted in exposition
Tagged Ching-Shui Cheng, concurrence, Laplacian eigenvalues, optimal design, root systems, statistics
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## The Royal Institution

The Royal Institution (or Ri, as its typographers have it) is one of the traditional bodies in Britain which explains science to the public, along with the Royal Society and the British Association. They overlap in function as well as … Continue reading

Posted in events, history
Tagged Christopher Zeeman, Humphry Davy, Royal Institution, statistics
1 Comment

## The electron is round

Yesterday’s Guardian had a short piece about research showing that the electron is, within experimental error, perfectly round. They also mentioned that this has implications for theories of elementary particles: under certain theories including supersymmetry, there would be particles which … Continue reading

## International Review of Mathematics

The International Review panel presented its draft report at a meeting in London last month. I meant to say something about it before; but better late than never, maybe. As well as commentary, I will quote various bits of the … Continue reading