Search for dissertations about: "np complete"
Showing result 1 - 5 of 33 swedish dissertations containing the words np complete.
-
1. Resource Allocation with Potts Mean Field Neural Network Techniques
Abstract : Potts mean field artificial neural network techniques are developed and applied to airline crew scheduling problems and routing problems. A propagator formalism in terms of Potts neurons is developed to handle global topological issues. An integrated method for identifying and classifying ECG complexes is presented. READ MORE
-
2. Algorithmic Bounds for Presumably Hard Combinatorial Problems
Abstract : In this thesis we present new worst case computational bounds on algorithms for some of the most well-known NP-complete and #P-complete problems and their optimization variants. We consider graph problems like Longest Path, Maximum Cut, Number of Perfect Matchings, Chromatic and Domatic Number, as well as Maximum k-Satisfiability and Set Cover. READ MORE
-
3. Complexity Dichotomies for CSP-related Problems
Abstract : Ladner’s theorem states that if P ≠ NP, then there are problems in NP that are neither in P nor NP-complete. Csp(Γ) is a class of problems containing many well-studied combinatorial problems in NP. READ MORE
-
4. Applications of Partial Polymorphisms in (Fine-Grained) Complexity of Constraint Satisfaction Problems
Abstract : In this thesis we study the worst-case complexity ofconstraint satisfaction problems and some of its variants. We use methods from universal algebra: in particular, algebras of total functions and partial functions that are respectively known as clones and strong partial clones. READ MORE
-
5. On state space structure and average case complexity in random K-SAT problems
Abstract : This thesis gives an introduction to a currently active area in the cross-section between theoretical computer science and theoretical physics. In the last ten years it has been suggested that critical behaviour, usually seen in models from condensed matter physics, may be responsible for the intractability of NP complete computation problems. READ MORE