Resolvents and complex powers of semiclassical cone operators

Peter Hintz

Mathematische Nachrichten, 2022, vol. 295, issue 10, 1990-2035

Abstract: We give a uniform description of resolvents and complex powers of elliptic semiclassical cone differential operators as the semiclassical parameter h tends to 0. An example of such an operator is the shifted semiclassical Laplacian h2Δg+1$h^2\Delta _g+1$ on a manifold (X,g)$(X,g)$ of dimension n≥3$n\ge 3$ with conic singularities. Our approach is constructive and based on techniques from geometric microlocal analysis: we construct the Schwartz kernels of resolvents and complex powers as conormal distributions on a suitable resolution of the space [0,1)h×X×X$[0,1)_h\times X\times X$ of h‐dependent integral kernels; the construction of complex powers relies on a calculus with a second semiclassical parameter. As an application, we characterize the domains of (h2Δg+1)w/2${\big (h^2\Delta _g+1\big )}^{w/2}$ for Rew∈−n2,n2$\operatorname{Re}w\in \left(-\tfrac{n}{2},\tfrac{n}{2}\right)$ and use this to prove the propagation of semiclassical regularity through a cone point on a range of weighted semiclassical function spaces.

Date: 2022
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