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Solenoidal endomorphisms minimize topological entropy

Alex Clark1 and Robbert Fokkink2

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Recommended by L-S Young

The entropy conjecture was settled for tori in 1977 by Misiurewicz and Przytycki (Bull. Acad. Polon. Sci. Sr. Sci. Math. Astronom. Phys. 25 575–8). We show that their result extends from tori to finite-dimensional compact and connected abelian groups. We give stronger results for hyperbolic automorphisms.


PACS

65.40.G- Other thermodynamical quantities

84.32.Hh Inductors and coils; wiring

MSC

20K01 Finite abelian groups

20G10 Cohomology theory

20F29 Representations of groups as automorphism groups of algebraic systems

20K15 Torsion-free groups, finite rank

20G15 

20K45 Topological methods (See also 22A05, 22B05)

Subjects

Electronics and devices

Condensed matter: structural, mechanical & thermal

Dates

Issue 7 (July 2009)

Received 14 November 2008, in final form 8 May 2009

Published 4 June 2009



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