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    Physical Process Version of the First Law of Thermodynamics for Black Holes in Higher Dimensional Gravity

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    The problem of physical process version of the first law of black hole thermodynamics for charged rotating black hole in n-dimensional gravity is elaborated. The formulae for the first order variations of mass, angular momentum and canonical energy in Einstein (n-2)-gauge form field theory are derived. These variations are expressed by means of the perturbed matter energy momentum tensor and matter current density.Comment: 6 pages, REVTEX, to be published in Phys.Rev.D1
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