Abstract
An iterated function system (IFS) can be enriched with an isometry in such a way that the resulting fractal set has prescribed symmetry. If the original system is contractive, then its associated self-similar set is an attractor. On the other hand, the enriched system is no longer contractive and therefore does not have an attractor. However, it posses a self-similar set which, under certain conditions, behaves like an attractor. We give a rigorous procedure which relates a given enriched IFS to a contractive one. Further, we link this procedure to the Lasota–Myjak theory of semiattractors, and so via invariant measures to probabilistic iterated function systems. The chaos game algorithm for enriched IFSs is discussed. We illustrate our main results with several examples which are related to classical fractals such as the Sierpiński triangle and the Barnsley fern.
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References
Andres, J., Fišer, J., Gabor, G., Leśniak, K.: Multivalued fractals. Chaos Solitons Fractals 24(3), 665–700 (2005)
Andrica, D., Bulgarean, V.: Some remarks on the group of isometries of a metric space. [In:] P.M. Pardalos (ed.) et al.: Nonlinear analysis. Stability, approximation, and inequalities. Springer, New York, pp. 57–64 (2012)
Bach, E.: De Bruijn sequences. The Sage Repository (2011). http://git.sagemath.org/sage.git/tree/src/sage/combinat/debruijn_sequence.pyx
Barnsley, M.F.: Fractals Everywhere. Dover, Mineola (2012)
Barnsley, M.F., Elton, J.H.: A new class of Markov processes for image encoding. Adv. Appl. Prob. 20, 14–32 (1988)
Barnsley, M., Vince, A.: Developments in fractal geometry. Bull. Math. Sci. 3(2), 299–348 (2013)
Barrientos, P.G., Fitzsimmons, M., Ghane, F.H., Malicet, D., Sarizadeh, A.: Addendum and corrigendum to: “On the chaos game of iterated function systems“. Topol Methods Nonlinear Anal. 55(2), 601–616 (2020)
Barrientos, P.G., Ghane, F.H., Malicet, D., Sarizadeh, A.: On the chaos game of iterated function systems. Topol. Methods Nonlinear Anal. 49(1), 105–132 (2017)
Beer, G.: Topologies on Closed and Closed Convex Sets. Kluwer, Dordrecht (1993)
Calude, C.S., Staiger, L.: Generalisations of disjunctive sequences. MLQ Math. Log. Quart. 51, 120–128 (2005)
Díaz, L.J., Matias, E.: Non-hyperbolic iterated function systems: semifractals and the chaos game. Fundam. Math. 250(1), 21–39 (2020)
Draves, S., Reckase, E.: The fractal flame algorithm. flam3.com, 1–41 (2008)
McFarlane, I., Hoggar, S.G.: Optimal drivers for “Random“ Iteration Algorithm. Comput. J. 37, 629–640 (1994)
Field, M., Golubitsky, M.: Symmetry in Chaos: A Search for Pattern in Mathematics, Art and Nature, 2nd edn. SIAM, Philadelphia (2009)
Fitzsimmons, M., Kunze, H.: Small and minimal attractors of an IFS. Commun. Nonlinear Sci. Numer. Simul. 85,(2020). (article id 105227)
Fleming, R.J., Jamison, J.E.: Isometries on Banach Spaces: Function Spaces. Chapman and Hall/CRC, Boca Raton (2003)
Gdawiec, K.: Pseudoinversion fractals. Lecture Notes Compu. Sci. 9972, 29–36 (2016)
McGehee, R.: Attractors for closed relations on compact Hausdorff spaces. Indiana Univ. Math. J. 41, 1165–1209 (1992)
Goebel, K., Kirk, W.A.: Topics in Metric Fixed Point Theory. Cambridge University Press, Cambridge (1990)
Hata, M.: On the structure of self-similar sets. Japan J. Appl. Math. 2, 381–414 (1985)
Iosifescu, M.: Iterated function systems. A critical survey. Math. Rep. (Bucur.) 11, 181–229 (2009)
Jadczyk, A.: Quantum Fractals: From Heisenberg’s Uncertainty to Barnsley’s Fractality. World Scientific, Hackensack (2014)
Jarosz, K.: Any Banach space has an equivalent norm with trivial isometries. Israel J. Math. 64(1), 49–56 (1988)
Kieninger, B.: Iterated Function Systems on Compact Hausdorff Spaces. Shaker-Verlag, Aachen (2002)
Kunze, H., La Torre, D., Mendivil, F., Vrscay, E.: Fractal-based Methods in Analysis. Springer, Berlin (2012)
Lasota, A., Myjak, J.: Semifractals. Bull. Pol. Acad. Sci. Math. 44(1), 5–21 (1996)
Lasota, A., Myjak, J.: Attractors of multifunctions. Bull. Pol. Acad. Sci. Math. 48(3), 319–334 (2000)
Leśniak, K.: Random iteration for infinite nonexpansive iterated function systems. Chaos 25,(2015). (article id 083117)
Leśniak, K., Snigireva, N.: Chaos game simulation over a prescribed driver in Maxima CAS. Rumak—Repository of the Nicolaus Copernicus University in Toruń, 2020-06-16, http://repozytorium.umk.pl/handle/item/6317
Leśniak, K., Snigireva, N., Strobin, F.: Weakly contractive iterated function systems and beyond: A manual. J. Differ. Equ. Appl. 26(8), 1114–1173 (2020)
Łoziński, A., Życzkowski, K., Słomczyński, W.: Quantum iterated function systems. Phys. Rev. E 68, no. 4, article id 046110, pp. 9 (2003)
Massopust, P.: Interpolation and Approximation with Splines and Fractals. Oxford University Press, Oxford (2010)
Mekhontsev, D.: An Algebraic Framework for Finding and Analyzing Self-affine Tiles and Fractals. PhD thesis. University of Greifswald, Greifswald, https://nbn-resolving.org/urn:nbn:de:gbv:9-opus-24794. (2019)
Mounoud, P.: Metrics without isometries are generic. Monatsh. Math. 176, 603–606 (2015)
Mumford, D., Series, C.: Indra’s Pearls. The Vision of Felix Klein. Cambridge University Press, Cambridge (2002)
Myjak, J., Szarek, T.: Attractors of iterated function systems and Markov operators. Abstr. Appl. Anal. 2003(8), 479–502 (2003)
Nikiel, S.: Iterated Function Systems for Real-Time Image Synthesis. Springer, London (2007)
Ratcliffe, J.G.: Foundations of Hyperbolic Manifolds, 2nd edn. Springer, New York (2006)
Reiter, C.: Fractals, Visualization, and J. 3rd edition. Lulu (2007)
Schlicker, S., Dennis, K.: Sierpinski n-gons. Pi Mu Epsilon Journal 10(2), 81–89 (1995)
Stenflo, Ö.: A survey of average contractive iterated function systems. J. Differ. Equ. Appl. 18(8), 1355–1380 (2012)
Strobin, F.: Contractive iterated function systems enriched with nonexpansive maps. Result. Math. 76, 153 (2021). https://doi.org/10.1007/s00025-021-01451-0
Vince, A.: Thresholds for one-parameter families of affine iterated function systems. Nonlinearity 33(12), 6541–6563 (2020)
Acknowledgements
We would like to thank Filip Strobin for fruitful discussions, and especially for pointing out to us that the results of our paper hold not only for proper spaces but for complete spaces as well. We also thank the unknown referees for their valuable comments which improved the presentation of our paper.
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Communicated by Jeffery Geronimo.
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Leśniak, K., Snigireva, N. Iterated Function Systems Enriched with Symmetry. Constr Approx 56, 555–575 (2022). https://doi.org/10.1007/s00365-021-09560-3
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DOI: https://doi.org/10.1007/s00365-021-09560-3