Credit: Getty Images/iStockphoto David Luenberger, 88, of Stanford, who was born in Los Angeles, who received a master’s degree and a doctorate in electrical engineering from Sanford University, who conducted groundbreaking research in control theory, optimization, economics, information science and investment science, who was one of the co-founders of the university’s Department of Engineering-Economic Systems, who authored six books and was an honorary professor at several international...