R. Balakrishnan et R. Blumenfeld, TRANSFORMATION OF GENERAL CURVE EVOLUTION TO A MODIFIED BELAVIN-POLYAKOV EQUATION, Journal of mathematical physics, 38(11), 1997, pp. 5878-5888
We show that the general evolution of the tangent to a curve in three-
dimensional space can be transformed to a modified form of the Belavin
-Polyakov equation. Using this, we fmd a rich variety of exact instant
on and twist solutions for several classes of evolution. Certain physi
cal applications are also discussed. (C) 1997 American Institute of Ph
ysics.