Johannes Hjelmslev in memoriam: 1873–1950

Regular Hjelmslev Planes . Ii

In this paper we introduce the notion of an «-partition for a Hjelmslev-matrix (//-matrix). This allows us to prove a new composition theorem for //-matrices. We obtain the existence of (/, r)//-matrices and hence of regular (/, ry-H-phaes for infinitely many series of invariants which were not yet known. In fact, many of these invariants were not even known to occur as the invariants of any //...

In Memoriam-Professor Ajit K.Padhy

No abstract available

Johannes Holtfreter

Memoriam.

George W. Housner, Carl F Braun Professor of Engineering, emeritus, died after a short illness on 10 November 2008, just a few weeks before his 98th birthday. He was in the retirement home in Pasadena where he had lived for several years. For all of us who knew George, this marked the end of an era. Few people have guided and nurtured a field the way George led earthquake engineering over a per...

In Memoriam: Mark Everingham

MARK EVERINGHAM was a brilliant colleague. You may have been aware of him at conferences where he asked penetrating questions that could crystallize a key aspect of a paper. In conversation with him you might have been stunned by a new connection he made between areas of research or to a crucial related work. These questions and observations were a reflection of his very broad knowledge and dee...