Open Access
2016 On Focusing Entropy at a Point
Ewa Korczak-Kubiak, Anna Loranty, Ryszard J. Pawlak
Taiwanese J. Math. 20(5): 1117-1137 (2016). DOI: 10.11650/tjm.20.2016.6758
Abstract

In the paper we consider points focusing entropy and such that this fact is influenced exclusively by the behaviour of the function around these points (i.e., it is independent from the form of the function at any distance from these points). Thus the notion of an $\mathcal{F}$-focal entropy point has been introduced. We prove that each edge periodic tree function and each continuous function mapping the unit interval into itself have such points. Moreover, we discuss the possibility of improving functions defined on some topological manifolds so that any fixed point of the function becomes its focal entropy point.

References

1.

R. L. Adler, A. G. Konheim and M. H. McAndrew, Topological entropy, Trans. Amer. Math. Soc. 114 (1965), no. 2, 309–319.  10.1090/s0002-9947-1965-0175106-9 MR175106 0127.13102 R. L. Adler, A. G. Konheim and M. H. McAndrew, Topological entropy, Trans. Amer. Math. Soc. 114 (1965), no. 2, 309–319.  10.1090/s0002-9947-1965-0175106-9 MR175106 0127.13102

2.

L. Alsedà, J. Llibre and M. Misiurewicz, Combinatorial Dynamics and Entropy in Dimension One, Second edition, Advanced Series in Nonlinear Dynamics 5, World Scientific, River Edge, NJ, 2000.  10.1142/1980 L. Alsedà, J. Llibre and M. Misiurewicz, Combinatorial Dynamics and Entropy in Dimension One, Second edition, Advanced Series in Nonlinear Dynamics 5, World Scientific, River Edge, NJ, 2000.  10.1142/1980

3.

D. J. Barrot, Set of periods, topological entropy and combinatorial dynamics for tree and graph maps, Univ. Aut. de Barcelona. http://www.tdx.cat/bitstream/handle/10803/3078/djb1de1.pdf?seq  http://www.tdx.cat/bitstream/handle/10803/3078/djb1de1.pdf?seq D. J. Barrot, Set of periods, topological entropy and combinatorial dynamics for tree and graph maps, Univ. Aut. de Barcelona. http://www.tdx.cat/bitstream/handle/10803/3078/djb1de1.pdf?seq  http://www.tdx.cat/bitstream/handle/10803/3078/djb1de1.pdf?seq

4.

L. S. Block and W. A. Coppel, Dynamics in One Dimension, Lecture Notes in Mathematics 1513, Springer-Verlag, Berlin, 1992.  10.1007/bfb0084762 0746.58007 L. S. Block and W. A. Coppel, Dynamics in One Dimension, Lecture Notes in Mathematics 1513, Springer-Verlag, Berlin, 1992.  10.1007/bfb0084762 0746.58007

5.

R. Bowen, Entropy for group endomorphisms and homogeneous spaces, Trans. Amer. Math. Soc. 153 (1971), 401–414; Erratum: 181 (1973), 509–510. {; http://dx.doi.org/10.1090/s0002-9947-1973-0320271-8  10.1090/s0002-9947-1971-0274707-x http://dx.doi.org/10.1090/s0002-9947-1973-0320271-8 MR320271 R. Bowen, Entropy for group endomorphisms and homogeneous spaces, Trans. Amer. Math. Soc. 153 (1971), 401–414; Erratum: 181 (1973), 509–510. {; http://dx.doi.org/10.1090/s0002-9947-1973-0320271-8  10.1090/s0002-9947-1971-0274707-x http://dx.doi.org/10.1090/s0002-9947-1973-0320271-8 MR320271

6.

M. Čiklová, Dynamical systems generated by functions with connected $\mc{G}_\delta$ graphs, Real Anal. Exchange 30, (2004), no. 2, 617–637.  MR2177423 M. Čiklová, Dynamical systems generated by functions with connected $\mc{G}_\delta$ graphs, Real Anal. Exchange 30, (2004), no. 2, 617–637.  MR2177423

7.

E. I. Dinaburg, The relation between topological entropy and metric entropy, Soviet Math. Doklady 11 (1970), 13–16.  0196.26401 E. I. Dinaburg, The relation between topological entropy and metric entropy, Soviet Math. Doklady 11 (1970), 13–16.  0196.26401

8.

T. N. T. Goodman, Relating topological entropy and measure entropy, Bull. London Math. Soc. 3 (1971), no. 2, 176–180.  10.1112/blms/3.2.176 MR289746 0219.54037 T. N. T. Goodman, Relating topological entropy and measure entropy, Bull. London Math. Soc. 3 (1971), no. 2, 176–180.  10.1112/blms/3.2.176 MR289746 0219.54037

9.

W. A. Kirk and B. Sims, Handbook of Metric Fixed Point Theory, Kluwer Academic Publishers, Dordrecht, 2001.  10.1007/978-94-017-1748-9 0970.54001 W. A. Kirk and B. Sims, Handbook of Metric Fixed Point Theory, Kluwer Academic Publishers, Dordrecht, 2001.  10.1007/978-94-017-1748-9 0970.54001

10.

S. Kolyada and \'L. Snoha, Topological entropy of nonautonomous dynamical systems, Random Comput. Dynam. 4 1996, no. 2-3, 205–233.  MR1402417 0909.54012 S. Kolyada and \'L. Snoha, Topological entropy of nonautonomous dynamical systems, Random Comput. Dynam. 4 1996, no. 2-3, 205–233.  MR1402417 0909.54012

11.

J. M. Lee, Introduction to Topological Manifolds, Graduate Texts in Mathematics 202, Springer-Verlag, New York, 2000.  10.1007/b98853 0956.57001 J. M. Lee, Introduction to Topological Manifolds, Graduate Texts in Mathematics 202, Springer-Verlag, New York, 2000.  10.1007/b98853 0956.57001

12.

M. Misiurewicz, Horseshoes for mappings of the interval, Bull. Acad. Polon. Sci. Sér. Sci. Math. 27 (1979), no. 2, 167–169.  MR542778 0459.54031 M. Misiurewicz, Horseshoes for mappings of the interval, Bull. Acad. Polon. Sci. Sér. Sci. Math. 27 (1979), no. 2, 167–169.  MR542778 0459.54031

13.

Z. H. Nitecki, Topological entropy and the preimage structure of maps, Real Anal. Exchange 29 (2003/04), no. 1, 9–41.  MR2061291 1083.37014 10.14321/realanalexch.29.1.0009 euclid.rae/1149860180 Z. H. Nitecki, Topological entropy and the preimage structure of maps, Real Anal. Exchange 29 (2003/04), no. 1, 9–41.  MR2061291 1083.37014 10.14321/realanalexch.29.1.0009 euclid.rae/1149860180

14.

R. J. Pawlak, On the entropy of Darboux functions, Colloq. Math. 116 (2009), no. 2, 227–241.  10.4064/cm116-2-7 MR2520142 1232.37010 R. J. Pawlak, On the entropy of Darboux functions, Colloq. Math. 116 (2009), no. 2, 227–241.  10.4064/cm116-2-7 MR2520142 1232.37010

15.

R. J. Pawlak and A. Loranty, The generalized entropy in the generalized topological spaces, Topology Appl. 159 (2012), no. 7, 1734–1742.  10.1016/j.topol.2011.05.043 MR2904061 1243.54040 R. J. Pawlak and A. Loranty, The generalized entropy in the generalized topological spaces, Topology Appl. 159 (2012), no. 7, 1734–1742.  10.1016/j.topol.2011.05.043 MR2904061 1243.54040

16.

R. J. Pawlak, A. Loranty and A. Bakowska, On the topological entropy of continuous and almost continuous functions, Topology Appl. 158 (2011), no. 15, 2022–2033.  10.1016/j.topol.2011.06.049 1227.54022 R. J. Pawlak, A. Loranty and A. Bakowska, On the topological entropy of continuous and almost continuous functions, Topology Appl. 158 (2011), no. 15, 2022–2033.  10.1016/j.topol.2011.06.049 1227.54022

17.

J. Stallings, Fixed point theorems for connectivity maps, Fund. Math. 47 (1959), 249–263.  MR117710 0114.39102 10.4064/fm-47-3-249-263 J. Stallings, Fixed point theorems for connectivity maps, Fund. Math. 47 (1959), 249–263.  MR117710 0114.39102 10.4064/fm-47-3-249-263

18.

P. Walters, An Introduction to Ergodic Theory, Graduate Texts in Mathematics 79, Springer-Verlag, New Yourk-Berlin, 1982.  10.1007/978-1-4612-5775-2 0475.28009 P. Walters, An Introduction to Ergodic Theory, Graduate Texts in Mathematics 79, Springer-Verlag, New Yourk-Berlin, 1982.  10.1007/978-1-4612-5775-2 0475.28009

19.

X. Ye and G. Zhang, Entropy points and applications, Trans. Amer. Math. Soc. 359 (2007), no. 12, 6167–6186.  10.1090/s0002-9947-07-04357-7 MR2336322 1121.37020 X. Ye and G. Zhang, Entropy points and applications, Trans. Amer. Math. Soc. 359 (2007), no. 12, 6167–6186.  10.1090/s0002-9947-07-04357-7 MR2336322 1121.37020
Copyright © 2016 The Mathematical Society of the Republic of China
Ewa Korczak-Kubiak, Anna Loranty, and Ryszard J. Pawlak "On Focusing Entropy at a Point," Taiwanese Journal of Mathematics 20(5), 1117-1137, (2016). https://doi.org/10.11650/tjm.20.2016.6758
Published: 2016
Vol.20 • No. 5 • 2016
Back to Top