𝔖 Bobbio Scriptorium
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Hereditary torsion classes of s-systems

✍ Scribed by R. Z. Zhang; K. P. Shum

Book ID
110561060
Publisher
Springer
Year
1996
Tongue
English
Weight
915 KB
Volume
52
Category
Article
ISSN
0037-1912

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A hereditary class 24 Β° of combinatorial geometries (or simple matroids) is a collection of geometries closed under minors and direct sums. A geometry G in ~ is extremal if no proper extension of G of the same rank is in Yr. The size function h(n) of ~ is defined by h(n)-max{[G[:GEgf and rank(G)-n},