Contact details

If you wish to email me for work-related matters, please send your message to

y ♦ LASTNAME1 ♠ HENRYVI ♦ ac ♦ uk

after replacing ♦ with `full stop', LASTNAME with my family name, ♠ with the `at sign', and HENRYVI with `lancaster'.

Post should be sent to:

Department of Mathematics and Statistics
Lancaster University
Bailrigg, Lancaster


Since October 2021, I am the Director of Studies for undergraduate students in our department on joint-degree schemes within the Faculty of Science and Technology, or "the FST DoS" for short.

Since October 2018, I am serving as Treasurer of the North British Functional Analysis Seminar (NBFAS). The Secretary is Dr. Evgenios Kakariadis (Newcastle upon Tyne).

Since October 2018, I am serving as the Study Abroad Director / International Students' Tutor for our department.


I have been on MathOverflow since 2009. (Those were the days ...)

I occasionally blog here about bits of maths-related flotsam, or inane "commentary" by bien-pensant op-ed writers, that have floated by and caught my attention. It's not updated as frequently as it should be, though.

Disclaimer: these comprise my own personal views and do not necessarily represent the opinions of the Department of Mathematics & Statistics, or Lancaster University, or indeed anyone else.

Mrs Brown bent down. "You're a very small bear," she said.
The bear puffed out its chest. "I'm a very rare sort of bear," he replied, importantly. "There aren't many of us left where I come from."

– from A Bear Called Paddington by Michael Bond –