Abstract.
It is well known that there are classes of test functions such that a Hankel operator is bounded if and only if it is bounded on those functions. Criteria are derived which determine whether a Hankel operator is compact or belongs to a particular Schatten class, in terms of its action on those test functions.
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Pott, S., Smith, M. & Walsh, D. Test Function Criteria for Hankel Operators. Integr. equ. oper. theory 58, 111–132 (2007). https://doi.org/10.1007/s00020-007-1483-3
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DOI: https://doi.org/10.1007/s00020-007-1483-3