On the homotopy test on surfaces
On the largest empty axis-parallel box amidst $n$ points
On the Necessary and Sufficient Condition of Greedy Routing Supporting Geographical Data Networks
On the Non-Termination of Ruppert's Algorithm
On the Number of Higher Order Delaunay Triangulations
On the number of radial orderings of planar point sets
On the number of simple arrangements of five double pseudolines
On the Set Multi-Cover Problem in Geometric Settings
On the Stretch Factor of Convex Delaunay Graphs
On the Topology of the Restricted Delaunay Triangulation and Witness Complex in Higher Dimensions
On Unit Distances in a Convex Polygon
Opaque sets
Open Problems from CCCG 2002
Operations on polytopes: application to tolerance analysis
Optimal 3D Angular Resolution for Low-Degree Graphs
Optimal Adaptive Algorithms for Finding the Nearest and Farthest Point on a Parametric Black-Box Curve
Optimal competitive online ray search with an error-prone robot
Optimal Moebius Transformations for Information Visualization and Meshing
Optimal Point Movement for Covering Circular Regions
Optimal Point Placement for Mesh Smoothing