We construct a nil algebra over a countable field, the polynomial ring over which is not nil. This answers a question of Amitsur. (C) 2000 Academic Press.
机构:
Shandong Inst Business & Technol, Sch Math & Informat Sci, Yantai 264005, Peoples R ChinaShandong Inst Business & Technol, Sch Math & Informat Sci, Yantai 264005, Peoples R China