文摘
The regularity of solutions to elliptic equations on a manifold with singularities, say, an edge, can be formulated in terms of asymptotics in the distance variable \(r>0\) to the singularity. In simplest form such asymptotics turn to a meromorphic behaviour under applying the Mellin transform on the half-axis. Poles, multiplicity, and Laurent coefficients form a system of asymptotic data which depend on the specific operator. Moreover, these data may depend on the variable \(y\) along the edge. We then have \(y\) -dependent families of meromorphic functions with variable poles, jumping multiplicities and a discontinuous dependence of Laurent coefficients on \(y.\) We study here basic phenomena connected with such variable branching asymptotics, formulated in terms of variable continuous asymptotics with a \(y\) -wise discrete behaviour.