Abstract
In this paper, the problem of self-adjointness of the product of two differential operators is considered. A number of results concerning self-adjointness of the productL 2 L 1 of two second-order self-adjoint differential operators are obtained by using the general construction theory of self-adjoint extensions of ordinary differential operators.
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Supported by the Royal Society and the National Natural Science Foundation of China and the Regional Science Foundation of Inner Mongolia
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Cao, Z., Sun, J. & Edmunds, D.E. On self-adjointness of the product of two second-order differential operators. Acta Mathematica Sinica 15, 375–386 (1999). https://doi.org/10.1007/BF02650732
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DOI: https://doi.org/10.1007/BF02650732