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# Category Archives: history

## From the archive, 8

Various diaries came to light while I was office-clearing last Christmas, most notably a diary I kept for five months, from December 1986 to May 1987. I had just started work at Queen Mary College (as it was then), and … Continue reading

## Spring break

It’s a bit of a jolt, working in a country which, as a result of the extreme violence of the wars of religion, does not recognise Good Friday. I don’t think I ever taught on Good Friday before, but this … Continue reading

## Donald Preece: obituary and bibliography

Rosemary has written a long obituary of Donald, far too long for a journal to consider, but worth having on record (I think).

Posted in doing mathematics, history, mathematics and ...
Tagged combinatorics, Donald Preece, music, statistics
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## Preece on doing research

In a paper entitled “Tight single-change covering designs — the inside story”, published in the Bulletin of the Institute of Combinatorics and its Applications, Donald Preece described how a piece of mathematical research actually gets done, forgotten, revived, extended, and … Continue reading

Posted in doing mathematics, history
Tagged Donald Preece, Ian Anderson, tight single-change covering designs
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## From the archive, 7

Sitting on my shelves were various old notebooks in which I’d kept diaries from time to time. Four of them contained a training diary from 1987, my first year at Queen Mary and the year I ran the London Marathon … Continue reading

Posted in doing mathematics, events, history
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## From the archive, 5

The first of my two papers with Paul Erdős was published in 1990 in a conference proceedings, and is a bit inaccessible; I have never managed to find a copy on the web. The Hungarians are collecting electronic copies of … Continue reading

## Primitive lambda-roots

Nearly ten years ago, Donald Preece and I wrote the first draft of a set of notes on primitive lambda-roots. We could never decide what do do with them: they were too short for a monograph, too long (and expository) … Continue reading

Posted in exposition, history
Tagged algebra, difference sets, Donald Preece, primitive roots, terraces
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## From the archive, 4

A photocopy of a sheet of paper in my handwriting. At the top left, my initials are written in the handwriting of Jaap Seidel. The page begins as follows. Theorem. Let X be a set of points in the n-cube … Continue reading

Posted in exposition, history
Tagged cube, Jaap Seidel, Johnson scheme, symmetric group
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## From the archive, 3

This is what I looked like in 1991: And here is evidence for the Cameron–Erdős conjecture before it was proved:

Posted in history, Neill Cameron artwork
Tagged Cameron-Erdos conjecture, sum-free sets
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