Abstract
Surface and line elements in three-dimensional space are given in terms of the delta function. We extend the representation to N-dimensional phase space to obtain the relation between the equi-energy surface and the density of states.
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Takahashi, Y. Surfaces and lines in terms of the delta and step functions. Found Phys 23, 739–750 (1993). https://doi.org/10.1007/BF01883807
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DOI: https://doi.org/10.1007/BF01883807