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Schwinger Terms and Cohomology of Pseudodifferential Operators
Martin Cederwall, Gabriele Ferretti, Bengt E. W. Nilsson +1
We study the cohomology of the Schwinger term arising in second quantization of the class of observables belonging to the restricted general linear algebra. We prove that, for all…
Why Don't We Have a Covariant Superstring Field Theory?
Martin Cederwall
This talk deals with the old problem of formulatingn a covariant quantum theory of superstrings, ``covariant'' here meaning having manifest Lorentz symmetry and supersymmetry. The…
Towards a Complete Twistorization of the Heterotic String
Igor A. Bandos, Martin Cederwall, Dmitrij P. Sorokin +1
In and 10 space--time dimensions considered is a string model invariant under transformations of space--time supersymmetry and local worldsheet supersymmetr…
Current Algebras
Martin Cederwall, Christian R. Preitschopf
We present -algebras as generalized Kac-Moody algebras. A number of free-field representations is found. We construct the octonionic projective spaces .
Higher-Dimensional Loop Algebras, Non-Abelian Extensions and p-Branes
M. Cederwall, G. Ferretti, B. E. W. Nilsson +1
We postulate a new type of operator algebra with a non-abelian extension. This algebra generalizes the Kac--Moody algebra in string theory and the Mickelsson--Faddeev algebra in th…