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math.AP2013
A solvable string on a Lorentzian surface
Jeanne N. Clelland, Peter J. Vassiliou
It is shown that there are nonlinear sigma models which are Darboux integrable and possess a solvable Vessiot group in addition to those whose Vessiot groups are central extensions…
math.AP2013★ 3 cited
Strings attached: New light on an old problem
Jeanne N. Clelland, Peter J. Vassiliou
The wave equation is generally regarded as a linear approximation to the equation describing the amplitude of a transversely vibrating elastic string in the p…