a

Personal

Please visit my photos page.

Send mail to:

Maths

If you are here because you are interested in knots and links, then here are the tables of knots and links in braid notation, and the thesis which explains how these tables were calculated.

If you are here because you are interested in flag manifolds (spheres, SO(n) and similar beasts), then here are the tables of the homotopy groups (or the free part, anyway).

For those who haven't seen it before, this remarkable formula [B] allows one to calculate the n^th digit of pi without calculating all the previous digits. Provided you are prepared to write pi in binary, that is.

Rock Climbing

I've climbed Cenotaph Corner, an E1 in Wales.

I helped to prepare the graded list up to HS for the 2000 BMC Stanage guide.

Friends and Family with home pages

Claims to fame

Please note that I am more proud of some of the following achievements than of others.

My birth was announced on stage by Max Bygraves.
I've unicycled 200 miles in under 4 days.
I've been in the lead item on an episode of Blue Peter (a popular British children's TV programme).
I've represented Britain internationally (at unicycle hockey).
I was one of the many co-inventors of site-swap notation for juggling.
An idea of Michael Greene's and mine was popularised by Ian Stewart [S] and inspired a work of art.
I've lead Take me out to the ball game at an American baseball game, despite being probably the only person in the stadium who didn't know the tune.
My Erdös-number is at most 7 (P. Erdös, J.-M. Deshouillers, P. Sarnak, I. Piatetski-Shapiro, M. Teicher, M.J. Fryers, M.T. Greene, D.A. Chalcraft).

References

[B] D. Bailey, P. Borwein and S. Plouffe, On the rapid computation of various polylogarithmic constants, Math. Comput. 66 (1997) 903-913

[S] Ian Stewart, A subway named Turing, Mathematical Recreations, in Scientific American (September, 1994) 90-92

These pages are written in HTML, and are best viewed with any browser at all.