I am a senior lecturer in the Institute for Mathematics at the University of Aberdeen, where I have worked since 2011. Before that I held postdoctoral positions at the University of Copenhagen and the University of Sheffield, and I studied for my PhD at Edinburgh University. My research is in the area called Algebraic Topology.

I currently teach the courses EG2012 Engineering Mathematics 2, MX4540 Knots, and MX4546 Algebraic Topology.

I am an organiser of the Scottish Topology Seminar.

### Articles

• Persistent magnitude
Joint with Dejan Govc.
Submitted.
arXiv.
• Magnitude cohomology
Submitted.
arXiv.
• On the edge of the stable range
Mathematische Annalen.
Article. arXiv. pdf.
• Categorifying the magnitude of a graph
Joint with Simon Willerton
Homology Homotopy Appl. 19(2), 2017, pp.31–60.
Article. arXiv.
• Homological stability for families of Coxeter groups.
Algebr. Geom. Topol. 16 (2016) 2779–2811.
Article. arXiv.
• On string topology of classifying spaces.
Joint with Anssi Lahtinen
Article. arXiv.
• Configuration spaces and $$\Theta_n$$.
Joint with David Ayala
Proc. Amer. Math. Soc. 142 (2014), no.7, 2243-2254.
Article. arXiv.
• Groups, cacti and framed little discs.
Trans. Amer. Math. Soc. 365(2013), 2597 - 2636
Article. arXiv.
• String Topology for complex projective spaces.
arXiv.
• String Topology for Lie Groups.
J. Topology (2010) 3(2): 424-442.
Abstract. Article. arXiv.
• Vector fields and flows on differentiable stacks.
Theory Appl. Categ, Vol. 22, No. 21, 2009, pp. 542-587.
Abstract. Article. arXiv.
• Morse Inequalities for Orbifold Cohomology.
Algebr. Geom. Topol. 9 (2009) 1105-1175.
Article. arXiv.
• The age grading and the Chen-Ruan cup product.
Bull. London Math. Soc. (2010) 42(5): 868-878
Abstract. Article. arXiv.
• The topology of certain 3-Sasakian 7-Manifolds.
Math. Ann. 339 (2007), no. 4, 733–755.
arxiv.
• Generalized Kreck-Stolz invariants and the topology of certain 3-Sasakian 7-manifolds.
Edinburgh University PhD Thesis, 2005.
pdf.