ENGLISH

Almost Completely Decomposable Groups (Algebra, Logic and Applications)

Book information

Publisher
CRC Press
Year
2000
ISBN
9056992252, 9789056992255
Language
english
Format
DJVU
Filesize
3 MB (3182459 bytes)
Edition
1
Pages
366\366
DPI
600
Time added
2024-08-02 13:18:07

Description

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 of acd groups has been developed and a suitable weakening of isomorphism, Lady's near-isomorphism, has been established as the rightconcept for studying acd groups. A number of important classes of acd groups has been successfully classified. Direct sum decompositions of acd groups are preserved under near-isomorphism and the well-known pathological decompositions can actually be surveyed in special cases.

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