1 Geometry of Nonpositive Curvature

Author(s):  
Werner Ballmann ◽  
Mikhael Gromov ◽  
Viktor Schroeder

2013 ◽  
Vol 46 (1) ◽  
pp. 51-64 ◽  
Author(s):  
Victor Chepoi ◽  
Daniela Maftuleac

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Motiejus Valiunas

Abstract Recently, I. J. Leary and A. Minasyan [Commensurating HNN extensions: Nonpositive curvature and biautomaticity, Geom. Topol. 25 (2021), 4, 1819–1860] studied the class of groups G ⁢ ( A , L ) G(A,L) defined as commensurating HNN-extensions of Z n \mathbb{Z}^{n} . This class, containing the class of Baumslag–Solitar groups, also includes other groups with curious properties, such as being CAT(0) but not biautomatic. In this paper, we classify the groups G ⁢ ( A , L ) G(A,L) up to isomorphism.


1995 ◽  
Vol 122 (1) ◽  
pp. 277-289 ◽  
Author(s):  
Bernhard Leeb

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