منابع مشابه
EG for systolic groups
We prove that if a group G is systolic, i.e. if it acts properly and cocompactly on a systolic complex X, then an appropriate Rips complex constructed from X is a finite model for EG.
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For all systolic groups we construct boundaries which are EZ–structures. This implies the Novikov conjecture for torsion–free systolic groups. The boundary is constructed via a system of distinguished geodesics in a systolic complex, which we prove to have coarsely similar properties to geodesics in CAT (0) spaces. MSC: 20F65; 20F67; 20F69;
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Background Under the guideline of Circular Letter LCCE/153, TTA has formed evaluation group (TTA EG) to test, said, IP-OFDMA for the 6th radio interface of IMT-2000. TTA would like to share the progress of evaluation to other groups and proponents and to clarify the questions in the relevant ITU-R Documents and comments provided by the Proponents in the contributions, 8F/1065 and 1079r1. We hav...
متن کاملFilling invariants of systolic complexes and groups
Systolic complexes were introduced in Januszkiewicz–Świa̧tkowski [12] and, independently, in Haglund [10]. They are simply connected simplicial complexes satisfying a certain condition that we call simplicial nonpositive curvature (abbreviated SNPC). The condition is local and purely combinatorial. It neither implies nor is implied by nonpositive curvature for geodesic metrics on complexes, but ...
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Vascular endothelial growth factor (VEGF) plays an essential role in angiogenesis. This includes developmental angiogenesis as the loss of a single allele is embryonic lethal due to lack of development of endothelial cells. During early development, endothelial cells depend on VEGF for survival and if it is withdrawn, massive apoptosis results. This is not true in adult organisms; withdrawal of...
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ژورنال
عنوان ژورنال: Commentarii Mathematici Helvetici
سال: 2009
ISSN: 0010-2571
DOI: 10.4171/cmh/156