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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