By D. E. Edmunds
The distribution of the eigenvalues of differential operators has lengthy interested mathematicians. fresh advances have shed new mild on classical difficulties during this sector, and this booklet provides a clean strategy, principally in accordance with the result of the authors. The emphasis this is on a subject matter of principal significance in research, particularly the connection among i) functionality areas on Euclidean n-space and on domain names; ii) entropy numbers in quasi-Banach areas; and iii) the distribution of the eigenvalues of degenerate elliptic (pseudo) differential operators. The remedy is essentially self-contained and obtainable to nonspecialists.
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