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19992009
most citedSubnormal operators regarded as generalized observables and compound-system-type normal extension related to su(1,1)

13 citations · 20 across the 5 of their papers we have counts for

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math.CA2009★ 2 cited

Differentiability of eigenfunctions of the closures of differential operators with rational coefficient functions

Fuminori Sakaguchi, Masahito Hayashi

In this paper, for an operator defined by the action of an M-th order differential operator with rational-type coefficients on the function space L_k^2(R):={f: measurable | \|f\|_k…