Boundary Value Problems and Hardy Spaces for Elliptic Systems with Block Structure

In this monograph, for elliptic systems with block structure in the upper half-space and t -independent coefficients, the authors settle the study of boundary value problems by proving compatible well-posedness of Dirichlet, regularity and Neumann problems in optimal ranges of exponents.  Prior to this work, only the two-dimensional situation was fully understood. In higher dimensions, partial results for existence in smaller ranges of exponents and for a subclass of such systems had been e