NONPOSITIVELY CURVED SINGULAR SURFACES CONTAINING BALLS WITH INFINITE AREA

Yong-Il Kim (Korea) and Doohann Lee (Korea)

Received December 14, 2007

References:

[1] A. D. Alexandrov, A theorem on triangles in a metric space and some of its applications, Tr. Mat. Inst. Akad. Nauk SSSR 38 (1951), 5-23. [2] S. Buyalo, Lectures on Space of Curvature Bounded from above, University of Illinois at Urbana Champaign, Spring Semester 1994 / 95. [3] R. Osserman, Bonnesen-style isoperimetric inequalities, Amer. Math. Monthly 86 (1979), 1-29.

Keywords and phrases: singular Hadamard space, isoperimetric inequality.