Background: For every ideal in
there is a related
dynamical system generated by
commuting automorphisms of a
compact abelian group via Pontryagin duality. For dynamics it is
very important to determine when such systems have a finiteness
condition called expansiveness. A theorem of Klaus Schmidt states
in effect that when
contains no nonzero integers, then
the system is expansive if and only if the complex amoeba of
does not contain the origin.
Question: Is there an algorithm to determine whether the complex
amoeba of an ideal in
contains the origin?
(contributed by Manfred Einsiedler and Doug Lind)
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