A heat trace anomaly on polygons
Journal article, 2015

Let Ω0 be a polygon in $\mathbb{R}$2, or more generally a compact surface with piecewise smooth boundary and corners. Suppose that Ωε is a family of surfaces with ${\mathcal C}$∞ boundary which converges to Ω0 smoothly away from the corners, and in a precise way at the vertices to be described in the paper. Fedosov [6], Kac [8] and McKean–Singer [13] recognised that certain heat trace coefficients, in particular the coefficient of t0, are not continuous as ε ↘ 0. We describe this anomaly using renormalized heat invariants of an auxiliary smooth domain Z which models the corner formation. The result applies to both Dirichlet and Neumann boundary conditions. We also include a discussion of what one might expect in higher dimensions.

Author

Rafe Mazzeo

Stanford University

Julie Rowlett

Chalmers, Mathematical Sciences, Mathematics

University of Gothenburg

Mathematical Proceedings of the Cambridge Philosophical Society

0305-0041 (ISSN) 1469-8064 (eISSN)

Vol. 159 2 303-319

Subject Categories

Geometry

Mathematical Analysis

DOI

10.1017/S0305004115000365

More information

Latest update

3/6/2018 1