Construction of corner singularities for Agmon-Douglis-Nirenberg elliptic systems

Martin Costabel, Monique Dauge

Corner singularities in plane domains are characterized by certain singular exponents and angular functions. Our construction of singularities is based on two Cauchy integrals at two different levels of symbolic calculus. This construction yields new information about the angular functions and also more explicit formulas for the computation of the singular exponents.

Published in Math. Nachr. 162 1993, 209--237

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