The neighbourhood of two adjacent vertices in a Conway 99-graph
Details of a search for the possible subgraphs of a Conway 99-graph consisting of two adjacent vertices and their respective neighbours.
Archive of entries posted by Graeme
Constraints on Conway’s 99-graph (and its subgraphs)
A look at some results that would have to be satisfied by a Conway 99-graph, if it exists.
Conway’s 99-graph (and related problems)
An introduction to strongly regular graphs via Conway’s 99-graph problem and some of its friends.
Euro 2018
I’ll be attending the 29th European Conference on Operational Research – more simply, Euro 2018 – in Valencia this summer. I’m not giving a presentation, but as I’ll be attending on behalf of OVO I’d be particularly keen to talk to anyone with experience of applying OR techniques in the energy industry. At a personal …
Visualising air quality data with Voronoi diagrams
An extended version of a lightning talk I’ll be giving on the subject of Voronoi diagrams: what they are, where they come from, and how we can use them to visualise (some) geographic data sets.
Analytics 2015
I will be attending Analytics 2015 in November, where some work at BA will be presented: Using Text Mining and Natural Language Processing to Automate the Classification of Passenger Complaints.
Data Visualisations in use at NRS
Some of my dissertation work on data visualisation is now in use by the National Records of Scotland: Top 20 boys’ names, 2002 – 2014 and Top 20 girls’ names, 2002 – 2014 More info Life Expectancy at Birth, Scotland and its Council areas 2011-2013 More info
Visualisation Of Scottish Demographic Data
My MSc dissertation is available for download here, as a 7.54Mb PDF. Here’s the abstract: This project explores the use of interactive visualisations to augment the extensive data published by the National Records of Scotland. Good visualisation can illustrate key trends in statistical data, increasing impact and accessibility; great visualisation can go further, and enable …
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My Erdős number…
…appears to be four (an infinite improvement). I coauthored a paper with Gary Greaves, whose recent paper Edge-signed graphs with smallest eigenvalue greater than -2 also saw contributions from Jack Koolen and Akhiro Munemasa. They both have an Erdős number of two (each via Chris Godsil, who is an Erdős coauthor), making Gary a three …
Recent popular baby names in Scotland
Given my previous anthroponomastical adventures I knew I’d want to play around with the popular names datasets during my project. Whilst I should only be thinking about visualisation rather than analysis, spend enough time compiling values from two dozen Excel files and you’ll inevitably start noticing patterns (even when they aren’t really there). So this …