I study dynamic games where players may be unaware of some fundamentals of the game itself, such as actions or players, and such unawareness may be lifted by other players’ actions during the play. Based on Li (2006a, 2006b), I propose a framework to deal with such games using standard tools of game theory. I construct examples to show that unawareness is distinctly different from assigning zer...

The medial-axis transform, also called skeleton, is a shape abstraction proposed by computer vision. The concept is closely related to cyclographic maps, a tool developed by descriptive geometry to investigate distance functions, and to the solu tion of the eikonal equation. We discuss these connections and their implications on techniques for computing the skeleton.