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Geometry and Entropy of Two Kinds of Extreme Kerr-Newmann Black Holes
Authors:WANG Bin  SU Rukeng
Affiliation:1. Department of Physics, Fudan University, Shanghai 200433, China;2. Department of Physics, Shanghai Normal University, Shanghai 200234, China
Abstract:Geometric and thermodynamical properties of two kinds of extreme Kerr-Newmann black holes have been investigated. We find that different values of entropy appear for these two kinds of extreme black holes and these results have close relation to their geometry.
Keywords:extreme black holes  entropy  topological properties  
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