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A Frameless 2-Coloring of the Plane Lattice
A picture frame in two dimensions is a rectangular array of symbols, with at
least two rows and columns, where the first and last rows are identical, and
the first and last columns are identical. If a coloring of the plane lattice
has no picture frames, we call it frameless. In this note we show how to create
a simple 2-coloring of the plane lattice that is frameless