Conyers+Herring+1913-2009

Conyers Herring was one of the founders of electronic structure theory. He devised the OPW method. Phillips and Kleinman, who made the first useful pseudopotentials for solids, based their ideas on Herring's work.

This is very sad to hear. I had no idea he was still alive, I must admit. For those interested, two extensive interviews with him can be found in this list: [|AIP interviews]