One service mathematics has rendered the 'Bt mm, .... si j'avait su comment en revenir, human race. It has put common sense back je n'y serais point alIe.' Jules Verne where it belongs. on the topmost shelf next to the dusty canister...

This book is devoted to an investigation of some important problems of mod­ ern filtering theory concerned with systems of 'any nature being able to per­ ceive, store and process an information and apply it for control and regulation'....

In this volume the investigations of filtering problems, a start on which has been made in [55], are being continued and are devoted to theoretical problems of processing stochastic fields. The derivation of the theory of processing...