In commutative algebra, an N-1 ring is an integral domain whose integral closure in its quotient field is a finitely generated -module. It is called a Japanese ring if for every finite extension of ...
INUYAMA, Aichi Prefecture--It may sound trite, but the keep of Inuyama Castle here really was built for keeps. A tree-ring analysis showed that the three-tiered, four-storied donjon was built ...