Mathematics – Dynamical Systems
Scientific paper
2012-03-10
Mathematics
Dynamical Systems
some results extended and proposition 3.3 added
Scientific paper
We examine the class of increasing sequences of natural numbers which are
IP-rigidity sequences for some weakly mixing mpt. This property is related to
certain subgroups of the circle including eigenvalue groups of dyadic towers
over the adding machine. We give examples, including a super-lacunary sequence
which is not IP-rigid.
Aaronson Jon
Hosseini Maryam
Lemanczyk Mariusz
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