Almost Completely Decomposable Groups

ISBN: 9789056992255 出版年：2000 页码：366 Mader, A CRC Press

An almost completely decomposable abelian (acd) group is an extension of a finite direct sum of subgroups of the additive group of rational numbers by a finite abelian group. Examples are easy to write and are frequently used but have been notoriously difficult to study and classify because of their computational nature. However, a general theory o