If you want to discuss any of the content of this site, or tell me about some cool maths, you should comment on a blog post (if there is a relevant one) or tweet me (@mscroggs). This way, other people will be able to see the comment and join the discussion.
Alternatively, you can email me at firstname.lastname@example.org or you can reach me on IRC—I am MScroggs on Freenode.
If you're old fashioned, you can reach me by post at Matthew Scroggs, Department of Mathematics, University College London, Gower Street, London, WC1E 6BT.
If you want to reuse any of my content, please drop me an email. I am probably happy for you to use anything I own as long as you link to me and do not make money from it, but it is courteous to ask first.