A Hilbert Space Problem Book Halmos, Paul R. Popularity → Current 25 Peak 60 Niche 85 Hilbert Space Problem Book 1ST Edition by Paul Halmos (Author) (9.25x6.3x1.3in 365pgs Hardcover NO DJ) D VAN NOSTRAND COMPANY INC (1967) D. Van Nostrand 1967 382 pages
Problems for mathematicians, young and old Halmos, Paul R. Popularity → Current 20 Peak 45 Niche 75 Book by Paul R. Halmos Mathematical Association of America 1991 318 pages