Share This Author
A geometric invariant of discrete groups
Valuations and Finitely Presented Metabelian Groups
The geometry of the set of characters iduced by valuations.
1. 1. Let k be a field endowed with a real valuation v: k-^R^. That is, a map which assigns to each non-zero element a e k a real number v (a) and to 0 e k the symbol i;(0) = GO, such that v(ab) =…
Relative homology and poincaré duality for group pairs
Valuations on free resolutions and higher geometric invariants of groups
by free G-modules F~ which are finitely generated for all i < m. If the trivial G-module 7/is of type (FP)m and this is indeed the most interesting situation we say also that the group G is of type…
The Distribution of the Planktonic Chaetognatha in the Pacific and their Relationship to the Water Masses1
- R. Bieri
- Environmental Science
The geographic extents of 27 species of Chaetognatha in the Pacific have been inferred from analyses of 2,900 plankton samples taken at more than 900 stations, with sharpest chaetognath boundary yet found in the Eastern Pacific at 18° to 20° N. Lat.
Constructable solvable groups
Normal subgroups in duality groups and in groups of cohomological dimension 2
- R. Bieri
A geometric invariant for modules over an Abelian group.
To every finitely generated module A over the group algebra of a fmitely generated Abelian group we attach a geometric invariant ΣΑ, and we investigate relations between geometric properties of ΣΑ…