Some aspects of four-dimensional black hole solutions in gauss-bonnet extended string gravity
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An internal singularity of a string four-dimensional black hole with second order curvature corrections is investigated. A restriction to a minimal size of a neutral black hole is obtained in the frame of the model considered. Vacuum polarization of the surrounding space-time caused by this minimal-size black hole is also discussed.
Key wordsBlack holes string theory higher order curvature corrections
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