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Triality Invariance in the N=2 Superstring
classification
✦ hep-th
keywords
superstringtrialityinvariancecayleydiscretefindformulationgeneralization
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We prove the discrete triality invariance of the N=2 NSR superstring moving in a D=2+2 target space. We find that triality holds also in the Siegel-Berkovits formulation of the selfdual superstring. A supersymmetric generalization of Cayley's hyperdeterminant, based on a quartic invariant of the SL(2|1)^3 superalgebra, is presented.
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