Geodesic
Singular operators satisfying an intertwining relation
Teoretičeskaâ i matematičeskaâ fizika, Tome 121 (1999) no. 2, pp. 264-270 Cet article a éte moissonné depuis la source Math-Net.Ru

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An intertwining relation between the Beltrami–Laplace operator with an added potential and the Beltrami–Laplace operator is considered on a Riemannian manifold. It is shown that the potential singularities of codimension one form completely geodesic hypersurfaces. 
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     title = {Singular operators satisfying an intertwining relation},
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}
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M. V. Feigin. Singular operators satisfying an intertwining relation. Teoretičeskaâ i matematičeskaâ fizika, Tome 121 (1999) no. 2, pp. 264-270. http://geodesic.mathdoc.fr/item/TMF_1999_121_2_a3/

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