Generalized pp-wave solutions on products of Ricci-flat spaces

Summary: "A multidimensional gravitational model with several scalar fields and fields of forms is considered. A wide class of generalized pp-wave solutions defined on a product of n+1 Ricci-flat spaces is obtained. Some examples of solutions (e.g., in supergravitational theories) are singled out. For special cone-type internal factor spaces the solutions are written in a Brinkmann form. An example of pp-wave solution is obtained using the Penrose limit of a solution defined on a product of two Einstein spaces."