Small-dimensional projective representations of symmetric and alternating groups

Published 16 Jun 2011 in math.RT and math.GR | (1106.3123v2)

Abstract: We classify the irreducible projective representations of symmetric and alternating groups of minimal possible and second minimal possible dimensions, and get a lower bound for the third minimal dimension. On the way we obtain some new results on branching which might be of independent interest.

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