A Gray code is a Hamilton path H on the n-cube, Q n. By labeling each edge of Q n with the dimension that changes between its incident vertices, a Gray code can be thought of as a sequence H = t 1 ;â€¦ (More)

A FISC or family of intersecting simple closed curves is a collection of simple closed curves in the plane with the properties that there is some open region common to the interiors of all theâ€¦ (More)

Let T(n) be the set of all well-formed parentheses strings of length 2n. We show that the elements of T(n) can be listed so that successive strings diier by the transposition of a left and a rightâ€¦ (More)

Polyomino Venn (or polyVenn) diagrams are Venn diagrams whose curves are the perimeters of polyominoes drawn on the integer lattice. Minimum area polyVenn diagrams are those in which each of the 2nâ€¦ (More)