Sökning: "Tree Algorithms"
Visar resultat 1 - 5 av 108 avhandlingar innehållade orden Tree Algorithms.
1. Studies in Efficient Discrete Algorithms
Sammanfattning : This thesis consists of five papers within the design and analysis of efficient algorithms.In the first paper, we consider the problem of computing all-pairs shortest paths in a directed graph with real weights assigned to vertices. We develop a combinatorial randomized algorithm that runs in subcubic time for a special class of graphs. LÄS MER
2. Constructing Evolutionary Trees - Algorithms and Complexity
Sammanfattning : In this thesis three general problems concerning construction of evolutionary trees are considered. Algorithms for the problems are presented and the complexity of the problems is investigated. The thesis consists of three corresponding parts. The first part is devoted to the problem of constructing evolutionary trees in the experiment model. LÄS MER
3. Contributions to the theory and applications of tree languages
Sammanfattning : This thesis is concerned with theoretical as well as practical aspects of tree languages. It consists of an introduction and eight papers, organised into three parts. LÄS MER
4. Structures of String Matching and Data Compression
Sammanfattning : This doctoral dissertation presents a range of results concerning efficient algorithms and data structures for string processing, including several schemes contributing to sequential data compression. It comprises both theoretic results and practical implementations. LÄS MER
5. Tree Structures in Broadcast Encryption
Sammanfattning : The need for broadcast encryption arises when a sender wishes to securely distribute messages to varying subsets of receivers, using a broadcast channel, for instance in a pay-TV scenario. This is done by selecting subsets of users and giving all users in the same subset a common decryption key. LÄS MER