Georg Heing, a charming, erudite man, and a ?rst rate mathematician died un- pectedly of a heart attack on May 10, 2005. Georg is survived by his wife Gerti, his daughter Susanne, and his son Peter. We have lost one the leading experts in the ?eld of structured matrices, a wonderful colleague, and a terri'c friend. GeorgHeinig sresults, approaches, andhisscienti'ctastein'uencedourc- munity of researchers working on structured matrices. In fact, the...