Today it is my sad duty to announce that Gerard Emch passed away on March 5, 2013
Here is the official announcement:
Professor Emch had fundamental contributions in the algebraic approach to quantum mechanics and here are two important books he wrote:
Mathematical and Conceptual Foundations of 20th-Century Physics
Algebraic Methods in Statistical Mechanics and Quantum Field Theory
Here is his mathematical genealogy entry:
His passing represents a great loss for the mathematical and physics community.