Dear all,
the command SchurCoverOfSymmetricGroup can be used to define the two
double covers of a symmetric group. According to the manual:
"+1 gives a group where the preimage of an adjacent transposition
(i,i+1) has order 4"
I thought that the convention is just the other way around: in the "+"
type cover the transpositions lift to involutions.
Best wishes,
Benjamin
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