SOME COMBINATORIAL AND RECURRENCE RELATIONS FOR SHAPES IN A TRELLIS
J. T. A. Christos, Richard L. Ollerton, Anthony G. Shannon · 2008
This paper considers the following problems from graph theory: in any section of given size of a trellis or wire-mesh fence, how many squares are there? how many rectangles are there? how many symmetric crosses are there? how many crosses in general ? Certain patterns of arrays of numbers related to various substructures in terms of the numbers of edges and vertices in each case are listed and counted.