# American Institute of Mathematical Sciences

September  2011, 31(3): 877-911. doi: 10.3934/dcds.2011.31.877

## Typical points for one-parameter families of piecewise expanding maps of the interval

 1 Ecole Normale Supérieure, Départment de mathématiques et applications (DMA), 45 rue d’Ulm 75230 Paris cedex 05, France

Received  March 2010 Revised  July 2011 Published  August 2011

For one-parameter families of piecewise expanding maps of the interval we establish sufficient conditions such that a given point in the interval is typical for the absolutely continuous invariant measure for a full Lebesgue measure set of parameters. In particular, we consider $C^{1,1}(L)$-versions of $\beta$-transformations, piecewise expanding unimodal maps, and Markov structure preserving one-parameter families. For families of piecewise expanding unimodal maps we show that the turning point is almost surely typical whenever the family is transversal.
Citation: Daniel Schnellmann. Typical points for one-parameter families of piecewise expanding maps of the interval. Discrete & Continuous Dynamical Systems - A, 2011, 31 (3) : 877-911. doi: 10.3934/dcds.2011.31.877
##### References:
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##### References:
 [1] V. Baladi, On the susceptibility function of piecewise expanding interval maps,, Comm. Math. Phys., 275 (2007), 839. doi: 10.1007/s00220-007-0320-5. Google Scholar [2] V. Baladi and D. Smania, Linear response formula for piecewise expanding unimodal maps,, Nonlinearity, 21 (2008), 677. doi: 10.1088/0951-7715/21/4/003. Google Scholar [3] V. Baladi and D. Smania, Smooth deformation of piecewise expanding unimodal maps,, Discrete Contin. Dyn. Syst., 23 (2009), 685. doi: 10.3934/dcds.2009.23.685. Google Scholar [4] M. Benedicks and L. Carleson, On iterations of $1-ax^2$ on $(-1,1)$,, Ann. of Math. (2), 122 (1985), 1. doi: 10.2307/1971367. Google Scholar [5] M. Björklund and D. Schnellmann, Almost sure equidistribution in expansive families,, Indag. Math. (N.S.), 20 (2009), 167. Google Scholar [6] K. Brucks and M. Misiurewicz, The trajectory of the turning point is dense for almost all tent maps,, Ergodic Theory Dynam. Systems, 16 (1996), 1173. doi: 10.1017/S0143385700009962. Google Scholar [7] H. Bruin, For almost every tent-map, the turning point is typical,, Fund. Math., 155 (1998), 215. Google Scholar [8] P. Collet and J.-P. Eckmann, "Iterated Maps on the Interval as Dynamical Systems,", Birkhäuser, (1980). Google Scholar [9] B. Faller and C.-E. Pfister, A point is normal for almost all maps $\beta x+\alpha\mod1$ or generalized $\beta$-transformations,, Ergodic Theory Dynam. Systems, 29 (2009), 1529. doi: 10.1017/S0143385708000874. Google Scholar [10] A. Lasota and J. A. Yorke, On the existence of invariant measures for piecewise monotonic transformations,, Trans. Amer. Math. Soc., 186 (1973), 481. doi: 10.1090/S0002-9947-1973-0335758-1. Google Scholar [11] T.-Y. Li and J. A. Yorke, Ergodic transformations from an interval into itself,, Trans. Amer. Math. Soc., 235 (1978), 183. doi: 10.1090/S0002-9947-1978-0457679-0. Google Scholar [12] P. Mattila, "Geometry of Sets and Measures in Euclidean Spaces (Cambridge studies in advanced mathematics),", Cambridge University Press, (1995). Google Scholar [13] M. Misiurewicz and E. Visinescu, Kneading sequences of skew tent maps,, Ann. Inst. H. Poincaré Probab. Statist., 27 (1991), 125. Google Scholar [14] V. A. Rohlin, Exact endomorphisms of a Lebesgue space,, (Russian) Izv. Akad. Nauk SSSR Ser. Mat., 25 (1961), 499. Google Scholar [15] J. Schmeling, Symbolic dynamics for $\beta$-shifts and self-normal numbers,, Ergodic Theory Dynam. Systems, 17 (1997), 675. doi: 10.1017/S0143385797079182. Google Scholar [16] M. Tsujii, Lyapunov exponents in families of one-dimensional dynamical systems,, Invent. Math., 111 (1993), 113. doi: 10.1007/BF01231282. Google Scholar [17] G. Wagner, The ergodic behaviour of piecewise monotonic transformations,, Z. Wahrsch. Verw. Gebiete, 46 (1979), 317. doi: 10.1007/BF00538119. Google Scholar [18] S. Wong, Some metric properties of piecewise monotonic mappings of the unit interval,, Trans. Amer. Math. Soc., 246 (1978), 493. doi: 10.1090/S0002-9947-1978-0515555-9. Google Scholar
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