Abstract
This work was inspired by [14], where A. Laptev obtained, in a very nice and simple manner, upper and lower bounds for the counting function of differential operators with constant coefficients. It appears that the results of [14] follow from some abstract theorems, which can be also applied to many other problems. In this paper we deal only with the lower bounds, the estimates from above will be considered in a forthcoming work.
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Safarov, Y. (1999). Lower bounds for the generalized counting function. In: Rossmann, J., Takáč, P., Wildenhain, G. (eds) The Maz’ya Anniversary Collection. Operator Theory: Advances and Applications, vol 110. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8672-7_16
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DOI: https://doi.org/10.1007/978-3-0348-8672-7_16
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