Geodesic
A geometric invariant for modules over an Abelian group.
Journal für die reine und angewandte Mathematik, Tome 322 (1981), pp. 170-189.

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Mots-clés : group algebra of a finitely-generated abelian group, valuations, finitely presented metabelian group, intersections of families of closed hemispheres, finitely-generated metabelian group 
@article{JRAM_1981__322_152328,
     author = {Robert Bieri and Ralph Strebel},
     title = {A geometric invariant for modules over an {Abelian} group.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {170--189},
     publisher = {mathdoc},
     volume = {322},
     year = {1981},
     zbl = {0448.20010},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1981__322_152328/}
}
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AU  - Ralph Strebel
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%A Ralph Strebel
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Robert Bieri; Ralph Strebel. A geometric invariant for modules over an Abelian group.. Journal für die reine und angewandte Mathematik, Tome 322 (1981), pp. 170-189. http://geodesic.mathdoc.fr/item/JRAM_1981__322_152328/