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Peer-reviewed
Research Article
* E-mail: ctopaz@macalester.edu
Affiliation Department of Mathematics, Statistics, and Computer Science, Macalester College, Saint Paul, Minnesota, United States of America
Affiliation Department of Mathematics, California State University at Northridge, Los Angeles, California, United States of America
Affiliation Department of Mathematics, University of British Columbia, Vancouver, British Columbia, Canada
Affiliation Department of Mathematics, Harvey Mudd College, Claremont, California, United States of America
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