Proof search without backtracking for free variable tableaux
Acknowledgments I would like to take this opportunity to express my gratitude to a number of people without whom I could never have completed this thesis. neither begun nor finished this thesis. I am deeply impressed with the thoroughness with which he read through the submitted version of this thesis in a matter of days, providing valuable comments at a very detailed level. I am also grateful to Prof. Dr. Wolfram Menzel, who not only acted as 'Korreferent', but was always available for discussions. He has supported and guided me in my studies ever since I started as a student assistent in 1995. I am indebted to my colleagues, Wolfgang Ahrendt, Thomas Baar, Bernhard Beckert, and Elmar Habermalz for the pleasant working atmosphere and the numerous discussions which provided the substratum from which grew the results presented here. I also thank Richard Bubel, who helped me with parts of the implementation. Finally, a very special Thank You goes to my wife Simone. How would I have managed the final months of work on this thesis without your constant love and support? I owe you more than I can put into words. ebenso relevant für rücksetzungsbasierte Beweisprozeduren.