The Author is a retired Professor of Mathematics still active in the creation and publication of original mathematics. His specialty lies in algebras associated with geometry and graph theory. His ...view moreThe Author is a retired Professor of Mathematics still active in the creation and publication of original mathematics. His specialty lies in algebras associated with geometry and graph theory. His current work combines aspects of these fields with an abiding interest in tilings. He currently resides in Oregon, where he enjoys hiking the mountains and swimming the streams with his wife Sylvie.view less