Geodesic
Lacunas and local algebraicity of volume functions
Journal of Singularities, Tome 18 (2018), pp. 350-357

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The volume cut off by a hyperplane from a bounded body with smooth boundary in R^{2k} never is an algebraic function on the space of hyperplanes: for k=1 it is the famous lemma XXVIII from Newton's Principia. Following an analogy of these volume functions with the solutions of hyperbolic PDE's, we study the local version of the same problem: can such a volume function coincide with an algebraic one at least in some domains of the space of hyperplanes, intersecting the body? We prove some homological and geometric obstructions to this integrability property. Based on these restrictions, we find a family of examples of such "locally integrable" bodies in Euclidean spaces.
DOI : 10.5427/jsing.2018.18r
Classification : 14D05, 44A99, 20F55 
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     title = {Lacunas and local algebraicity of volume functions},
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     pages = {350--357},
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     year = {2018},
     doi = {10.5427/jsing.2018.18r},
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V. A. Vassiliev. Lacunas and local algebraicity of volume functions. Journal of Singularities, Tome 18 (2018), pp. 350-357. doi: 10.5427/jsing.2018.18r

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