Institution: | (1) Department of Mathematics and Statistics, University of Vermont, Burlington, VT 05405, USA;(2) Department of Chemistry, University of Vermont, Burlington, VT 05405, USA;(3) Department of Mathematics, Saint Michael’s College, One Winooski Park, Colchester, VT 05439, USA;(4) Department of Chemistry, Saint Michael’s College, One Winooski Park, Colchester, VT 05439, USA |