About the Authors

William R. Holmes

wrholmes@uci.edu

Affiliations Department of Mathematics, University of British Columbia, Vancouver, British Columbia, Canada, Department of Mathematics, University of California, Irvine, California, United States of America

Leah Edelstein-Keshet

Affiliation Department of Mathematics, University of British Columbia, Vancouver, British Columbia, Canada

Competing Interests

The authors have declared that no competing interests exist.