My name is Graeme, and I am a lapsed Mathematician.

Back when I was more active in the field, *Modulo Errors* was where I kept track of my mathematical output (for other projects, try the main site, Straylight). For a chronological overview – which will reveal just how long it’s been since an update – try the `blog‘ listing; or pick from one of the main themes / phases below.

## Operational Research, Analytics and Data Science

After academia, I made a career shift into Operational Research; this was made possible by my participation in the University of Edinburgh’s MSc programme; as detailed here. Since then, I have held various roles in what could most generally be described as analytics: with British Airways, Bristol Airport, and now Ovo Energy. Some of the more mathematical aspects have included Revenue Management, demand forecasting, and data visualisation.

## Pure Mathematics

As a postgraduate student in Edinburgh, and subsequently as a postdoctoral fellow in Bristol, I carried out research in pure mathematics. My published work was on matrices with constrained eigenvalues, particularly in connection with Lehmer’s problem, but more generally I was interested in computational, algorithmic and/or experimental aspects of number theory and graph theory.

## Outreach

Along the way I’ve often tried to convey some of my enthusiasm for mathematics to others (whether they shared that enthusiasm or not!); some of the more organised events and activities of this nature are documented on the Outreach section. Some of the content on Modulo Errors is deliberately pitched at a wider readership; such posts can be identified by the Popular Mathematics tag.

## Curiosities

My entry in the Mathematics Genealogy Project is here, which can be traced back eventually to Newton.

My Erdos number is (at most) four.