TANGENT UNIT-VECTOR FIELDS: NONABELIAN HOMOTOPY INVARIANTS AND THE DIRICHLET ENERGY
A. Majumdar, J.M. Robbins, M. Zyskin
Mathematical Institute, University of Oxford, 24--29 St.Giles, Oxford OX1 3LB, UK;School of Mathematics, University of Bristol, University Walk, Bristol BS8 1TW, UK ;Department of Mathematics, |SETB 2.454-80 Fort Brown, Brownsville, TX 78520, USA
AM was supported by a Royal Commission for the Exhibition of 1851 Research Fellowship between 2006 - 2008. AM is now supported by
Award No. KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST) to the Oxford Centre for Collaborative Applied Mathematics.