An invariant for pairs of almost commuting unbounded operators

V. M. Manuilov

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An invariant for pairs of almost commuting unbounded operators

V. M. Manuilov

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Abstract

For a wide class of pairs of unbounded selfadjoint operators with bounded commutator we construct a K-theoretical integer invariant which is continuous, is equal to zero for commuting operators and is equal to one for the pair (x, i d/dx).

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V. M. Manuilov. 1997-02-17. An invariant for pairs of almost commuting unbounded operators. https://arxiv.org/abs/funct-an/9702013

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