The numerical treatment of integral equations is an important problem in science and industry. Regardless of whether the integral equation is a straight model of a physical state, like the radiosity or the heat radiation equation, or whether it is derived from partial differential equations, a memory and computing time efficient solving algorithm is essential for all practical applications. The present book is dedicated to the fast solution of boundary integral equations on unstructured meshes by the Galerkin scheme and its application to the special situation of the radiosity equation....