Table of contents : PROCEEDINGS OF THE SIXTH WORKSHOP ON ALGORITHM ENGINEERING AND EXPERIMENTS AND THE FIRST WORKSHOP ON ANALYTIC ALGORITHMICS AND COMBINATORICS......Page 1 CONTENTS......Page 8 ALENEX WORKSHOP PREFACE......Page 10 ANALCO WORKSHOP PREFACE......Page 12 Workshop on Algorithm Engineering and Experiments......Page 14 Engineering Geometric Algorithms: Persistent Problems and Some Solutions......Page 16 Engineering a Cache-Oblivious Sorting Algorithm*......Page 17 The Robustness of the Sum-of-Squares Algorithm for Bin Packing......Page 31 Practical Aspects of Compressed Suffix Arrays and FM-index in Searching DNA Sequences......Page 44 Faster placement of hydrogens in protein structures by dynamic programming......Page 52 An Experimental Analysis of a Compact Graph Representation......Page 62 Kernelization Algorithms for the Vertex Cover Problem: Theory and Experiments*......Page 75 Safe Separators for Treewidth*......Page 83 Efficient Implementation of a Hotlink Assignment Algorithm for Web Sites......Page 92 Experimental Comparison of Shortest Path Approaches for Timetable Information*......Page 101 Reach-based Routing: A New Approach to Shortest Path Algorithms Optimized for Road Networks......Page 113 Lazy Algorithms for Dynamic Closest Pair with Arbitrary Distance Measures......Page 125 Approximating the Visible Region of a Point on a Terrain1......Page 133 A computational framework for handling motion......Page 142 Engineering a Sorted List Data Structure for 32 Bit Keys*......Page 155 Workshop on Analytic Algorithmics and Combinatorics......Page 164 Theory and Practice of Probabilistic Counting Algorithms......Page 165 Analysis of a Randomized Selection Algorithm Motivated by the LZ'77 Scheme......Page 166 The Complexity of Jensen's Algorithm for Counting Polyominoes......Page 174 Distributional Analyses of Euclidean Algorithms......Page 183 A Simple Primality Test and the rth Smallest Prime Factor......Page 198 Gap-free samples of geometric random variables - Extended Abstract......Page 207 Computation of a Class of Continued Fraction Constants......Page 212 Compositions and Patricia tries: no fluctuations in the variance!......Page 224 Quadratic Convergence for Scaling of Matrices......Page 229 Partial Quicksort......Page 237 AUTHOR INDEX......Page 242