Computability and Complexity in Analysis : 4th International Workshop CCA 2000 Swansea UK September 17–19 2000 Selected Papers This book constitutes the thoroughly refereed post proceedings of the 4th International Workshop on Computability and Complexity in Analysis CCA 2000 held in Swansea UK in September 2000.The 23 revised full papers presented together with a report on a competition of exact real arithmetic systems were carefully selected from 28 papers accepted for presentation during the workshop. The book presents a cross section on current research on computability and complexity in analysis