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arXiv · 1202.4574

Parameter-dependent Pseudodifferential Operators of Toeplitz Type

Jörg Seiler
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Abstract

We present a calculus of pseudodifferential operators that contains both usual parameter-dependent operators -- where a real parameter τ enters as an additional covariable -- as well as operators not depending on τ. Parameter-ellipticity is characterized by the invertibility of three associated principal symbols. The homogeneous principal symbol is not smooth on the whole co-sphere bundle but only admits directional limits at the north-poles, encoded by a principal angular symbol. Furthermore there is a limit-family for τ\to+\infty. Ellipticity permits to construct parametrices that are inverses for large values of the parameter. We then obtain sub-calculi of Toeplitz type with a corresponding symbol structure. In particular, we discuss invertibility of operators of the form P_1A(τ)P_0 where both P_0 and P_1 are zero-order projections and A(τ) is a usual parameter-dependent operator of arbitrary order or A(τ)=τ^μ-A with a pseudodifferential operator A of positive integer order μ.

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Jörg Seiler. 2013-03-13. Parameter-dependent Pseudodifferential Operators of Toeplitz Type. https://doi.org/10.1007/s10231-013-0369-z

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