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Homoclinic points, atoral polynomials, and periodic points of algebraic -actions

2012
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Ergodic Theory and Dynamical Systems
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Cyclic algebraic Z d -actions are defined by ideals of Laurent polynomials in d commuting variables. Such an action is expansive precisely when the complex variety of the ideal is disjoint from the multiplicative d-torus. For such expansive actions it is known that the limit for the growth rate of periodic points exists and is equal to the entropy of the action. In an earlier paper the authors extended this result to ideals whose variety intersects the d-torus in a finite set. Here we further

doi:10.1017/s014338571200017x
fatcat:ln55bakn2jdh3bavyewqntfbea