1. Department of Mathematics, Colorado State University, Fort Collins, Colorado 80524, USA
2. Department of Computational Mathematics, Science, and Engineering, Michigan State University, East Lansing, Michigan 48824, USA
3. Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
4. Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
5. Department of Mathematics and Statistics, Washington State University, Pullman, Washington 99164, USA
6. Department of Mathematics, University of Colorado, Boulder, Colorado 80309, USA
7. Department of Mathematics and Statistics, Washington State University, Vancouver, Washington 98686, USA
8. Department of Chemistry, Washington State University, Pullman, Washington 99164, USA
9. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA