You may have been redirected here because you tried to access centaur.maths.qmul.ac.uk, which is no longer available. I have moved most of the information that I think is still potentially useful and not available elsewhere either here if it relates primarily to QMUL or to my new personal Google web site Centaur if it does not relate primarily to QMUL. But if you can't find what you expected to find at centaur.maths.qmul.ac.uk at one of these two sites then please email me.