Parameter-dependent Pseudodifferential Operators of Toeplitz Type
arXiv:1202.4574 · doi:10.1007/s10231-013-0369-z
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.
22 pages; significant chances in the introduction and Section 4.2; Section 5 worked over