Richard Beals studied mathematics at Yale University (B.A. 1960, Ph.D. 1964) and economics at Harvard (1960-1961). Held positions at Yale (Instructor, 1964-1965; Assistant Professor 1965-1966) and the University of Chicago (since 1966). Principal mathematical interests are partial differential equations and operator theory. Published papers on elliptic and hyperbolic partial differential equations, local solvability of linear partial differential equations, operator theory, differential equations in Banach spaces, mathematical psychology, mathematical economics.
Goes over advanced mathematical analysis. At times a bit wordy, at other times a bit too notation-heavy without preceding invitation to said notation. Sometimes I wish he'd put the equation first and explanation after, instead of putting the equation after some text. Good for what it sets out to do.