Geodesic flow on (super-) Bott-Virasoro group and Harry Dym family

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We show various Harry Dym type equations and Super Harry Dym equations, introduced by Brunelli, Das, and Popowicz [2003 Supersymmetric extensions of the Harry Dym hierarchy, J. Math. Phys. 44, 4756-4767 (2003)], follow from the geodesic flows on the Bott-Virasoro group and its supersymmetric generalization, superconformal group. In fact, their bi-Hamiltonian structures can be derived from the Lie Poisson structures on the (super-) Bott-Virasoro orbit. We also show that that m 2KdV or Calogero-Degasperis equation is also connected to the Bott-Virasoro group.

Original languageBritish English
Pages (from-to)1561-1570
Number of pages10
JournalJournal of Mathematical Physics
Issue number4
StatePublished - Apr 2004


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