Some problems related to keys and the Boyce-Codd normal form
Vũ Đức Thi, Nguyễn Hoàng Sơn · Acta Cybernetica · 2004
The aim of this paper is to investigate the connections between minimal keys and antikeys for special Sperner-systems by hypergraphs. The Boyce-Codd normal form and some related problems are also studied in this paper.