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CPT groups for spinor field in de Sitter space
A group structure of the discrete transformations (parity, time reversal and
charge conjugation) for spinor field in de Sitter space are studied in terms of
extraspecial finite groups. Two groups are introduced, the first group
from an analysis of the de Sitter-Dirac wave equation for spinor field, and the
second group from a purely algebraic approach based on the automorphism set of
Clifford algebras. It is shown that both groups are isomorphic to each other.Comment: 7 page
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