Abstract The propagation mechanism in an early string model on a compact Riemann surface is investigated. Starting from the time developing differential, we succesively construct algebras of meromorphic vectorfields on a punctured Riemann surface of genus 1, the theory behind being described by the Riemann-Roch theorem. A topological deformation of the surface is investigated. In total, we obtain multiparametric generalizations of the De-Witt-Algebra and its central extended version, the Virasoro algebra.
Seminarsko predavanje bo v cetrtek, 14. marca 2002 ob 15:15 uri
v se- minarski sobi CAMTP, Krekova 2, pritlicje.
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