The description for this book, Degrees of Unsolvability. (AM-55), Volume 55, will be forthcoming.

For the purposes of this monograph, "by a degree" is meant a degree of recursive unsolvability. A degree [script bold]m is said to be minimal if 0 is the unique

This book offers an original and informative view of the development of fundamental concepts of computability theory. The treatment is put into historical conte

Contents: Recursive Enumerability and the Jump Operator; On the Degrees Less Than 0'; A Simple Set Which Is Not Effectively Simple; The Recursively Enumerable D

..."The book, written by one of the main researchers on the field, gives a complete account of the theory of r.e. degrees. .... The definitions, results and pro