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Turkish Journal of Mathematics

Authors

SHIJIE GU

DOI

10.3906/mat-1509-52

Abstract

It is shown that the curvature bounded above (resp. below) in the sense of Alexandrov is equivalent to the curvature bounded above (resp. below) in the sense of Busemann if and only if the sum of adjacent average angles is at least (resp. at most) $\pi$.

First Page

211

Last Page

215

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Mathematics Commons

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