The best possible integer un such that fun = 1, if f is an invertible n × n matrix with coefficients in a Boolean ring, is determined. The period of linear recursive sequences in a Boolean ring (e.g.
Let G be a compact Lie group. We use Weyl functional calculus (Anderson, 1969) and symplectic convexity theorems to determine the support and singular support of the operator-valued Fourier transform ...
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