Andreas Dress is a Professor Emeritus in the Mathematics Department at the University of Bielefeld, Germany. Katharina T. Huber is a Lecturer in the School of Computing Sciences at the University of East Anglia, UK. Jacobus Koolen is an Associate Professor in the Department of Mathematics at Pohang University of Science and Technology (POSTECH), South Korea. Vincent Moulton is a Professor in the School of Computing Sciences at the University of East Anglia, UK. Andreas Spillner is an Assistant Professor in the Department of Mathematics and Computer Science at the University of Greifswald, Germany.

"This book concerns the combinatorial description of phylogenetic trees and related structures such as phylogenetic networked and tight spans. The book presents a system approach which includes both classical and new results." Stephen J. Willson, Mathematical Reviews

• 1. Preliminaries; 2. Encoding X-trees; 3. Consistency of X-tree encodings; 4. From split systems to networks; 5. From metrics to networks; 6. From quartet and tree systems to trees; 7. From metrics to split systems and back; 8. Maps to and from quartet systems; 9. Rooted trees and the Farris transform; 10. On measuring and removing inconsistencies.

Andreas Dress is a Professor Emeritus in the Mathematics Department at the University of Bielefeld, Germany. Katharina T. Huber is a Lecturer in the School of Computing Sciences at the University of East Anglia, UK. Jacobus Koolen is an Associate Professor in the Department of Mathematics at Pohang University of Science and Technology (POSTECH), South Korea. Vincent Moulton is a Professor in the School of Computing Sciences at the University of East Anglia, UK. Andreas Spillner is an Assistant Professor in the Department of Mathematics and Computer Science at the University of Greifswald, Germany.

"This book concerns the combinatorial description of phylogenetic trees and related structures such as phylogenetic networked and tight spans. The book presents a system approach which includes both classical and new results." Stephen J. Willson, Mathematical Reviews

• 1. Preliminaries; 2. Encoding X-trees; 3. Consistency of X-tree encodings; 4. From split systems to networks; 5. From metrics to networks; 6. From quartet and tree systems to trees; 7. From metrics to split systems and back; 8. Maps to and from quartet systems; 9. Rooted trees and the Farris transform; 10. On measuring and removing inconsistencies.

Andreas Dress is a Professor Emeritus in the Mathematics Department at the University of Bielefeld, Germany. Katharina T. Huber is a Lecturer in the School of Computing Sciences at the University of East Anglia, UK. Jacobus Koolen is an Associate Professor in the Department of Mathematics at Pohang University of Science and Technology (POSTECH), South Korea. Vincent Moulton is a Professor in the School of Computing Sciences at the University of East Anglia, UK. Andreas Spillner is an Assistant Professor in the Department of Mathematics and Computer Science at the University of Greifswald, Germany.

"This book concerns the combinatorial description of phylogenetic trees and related structures such as phylogenetic networked and tight spans. The book presents a system approach which includes both classical and new results." Stephen J. Willson, Mathematical Reviews

• 1. Preliminaries; 2. Encoding X-trees; 3. Consistency of X-tree encodings; 4. From split systems to networks; 5. From metrics to networks; 6. From quartet and tree systems to trees; 7. From metrics to split systems and back; 8. Maps to and from quartet systems; 9. Rooted trees and the Farris transform; 10. On measuring and removing inconsistencies.