Mr. J. W. Williamson

Semi Williamson Type Matrices and the W (2n; N) Conjecture

Four (1,-1, 0)-matrices of order m, X = (x ij), Y = (y ij), Z = (z ij), U = (u ij) satisfying will be called semi Williamson type matrices of order m. In this paper we prove that if there exist Williamson type matrices of order n 1 ;: :: ;n k then there exist semi Williamson type matrices of order N = Q k j=1 n rj j , where r j are non-negative integers. As an application, we obtain a W(4N;2N)....

Dr J. W. Ballantyne

W. G. J. Hampson

Lady Manners School Bakewell, Corpus Christi College, Oxford, and St. Mary's Hospital. He graduated B.A. (Physiology) in 1960 and M.A., B.M., B.Ch., in 1964. After qualification his first appointment was to the orthopaedic unit at St. Mary's and this post produced a life-long enthusiasm for the speciality. Further posts at St. Mary's followed and he worked at Coventry, Oxford, Liverpool and Edi...

Multiple Parton Interactions in Z + 4 j , W ± W ± + 0 / 2 j and W + W − + 2 j production at the LHC

W. J. Hill, M.R.C.S., L.R.C.P.

Clevedon has lost a good friend and skilful practitioner by the death of Walter Hill on June 2nd, while to his former colleagues at the Bristol Royal Infirmary his untimely and unexpected death at the age of 53 makes a deeply-deplored gap in the alumni of the Bristol School, where he entered as a student in 1880, subsequently taking his M.R.C.S. and L.R.C.P. Remarkable for his quiet, almost ret...