Projections in Venn-Euler Diagrams

  title={Projections in Venn-Euler Diagrams},
  author={Joseph Gil and John Howse and Stuart Kent and John Taylor},
Venn diagrams and Euler circles have long been used to express constraints on sets and their relationships with other sets. However, these notations can get very cluttered when we consider many closed curves or contours. In order to reduce this clutter, and to focus attention within the diagram appropriately, the notion of a projected contour, or projection, is introduced. Informally, a projected contour is a contour that describes a set of elements limited to a certain context. Through a… CONTINUE READING