79 research outputs found
Automorphism Group of : Applications to the Bosonic String
This paper is concerned with the formulation of a non-pertubative theory of
the bosonic string. We introduce a formal group which we propose as the
``universal moduli space'' for such a formulation. This is motivated because
establishes a natural link between representations of the Virasoro algebra
and the moduli space of curves. Among other properties of it is shown that
a ``local'' version of the Mumford formula holds on .Comment: 29 page
Convolutional Goppa Codes
We define Convolutional Goppa Codes over algebraic curves and construct their
corresponding dual codes. Examples over the projective line and over elliptic
curves are described, obtaining in particular some Maximum-Distance Separable
(MDS) convolutional codes.Comment: 8 pages, submitted to IEEE Trans. Inform. Theor
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