ArticleOriginal scientific text

Title

Solutions with big graph of iterative functional equations of the first order

Authors 1

Affiliations

  1. Institute of Mathematics, Silesian University, Bankowa 14, 40-007 Katowice, Poland

Abstract

We obtain a result on the existence of a solution with big graph of functional equations of the form g(x,(x),(f(x)))=0 and we show that it is applicable to some important equations, both linear and nonlinear, including those of Abel, Böttcher and Schröder. The graph of such a solution has some strange properties: it is dense and connected, has full outer measure and is topologically big.

Keywords

iterative functional equation, big graph

Bibliography

  1. L. Bartłomiejczyk, Solutions with big graph of homogeneous functional equations in a single variable, Aequationes Math. 56 (1998), 149-156.
  2. L. Bartłomiejczyk, Solutions with big graph of the equation of invariant curves, submitted.
  3. L. Bartłomiejczyk, Iterative roots with big graph, submitted.
  4. L. Bartłomiejczyk, Solutions with big graph of an equation of the second iteration, submitted.
  5. J. P. R. Christensen, On sets of Haar measure zero in abelian Polish groups, Israel J. Math. 13 (1972), 255-260.
  6. J. P. R. Christensen, Topology and Borel Structure, North-Holland Math. Stud. 10, North-Holland, Amsterdam, 1974.
  7. P. R. Halmos, Measure Theory, Grad. Texts in Math. 18, Springer, New York, 1974.
  8. F. B. Jones, Connected and disconnected plane sets and the functional equation f(x)+f(y)=f(x+y), Bull. Amer. Math. Soc. 48 (1942), 115-120.
  9. P. Kahlig and J. Smítal, On the solutions of a functional equation of Dhombres, Results Math. 27 (1995), 362-367.
  10. M. Kuczma, Functional Equations in a Single Variable, Monografie Mat. 46, PWN-Polish Sci. Publ., Warszawa, 1968.
  11. M. Kuczma, An Introduction to the Theory of Functional Equations and Inequalities. Cauchy's Equation and Jensen's Inequality, Prace Nauk. Uniw. Śląskiego 489, PWN & Uniw. Śląski, Warszawa-Kraków-Katowice, 1985.
  12. M. Kuczma, B. Choczewski and R. Ger, Iterative Functional Equations, Encyclopedia Math. Appl. 32, Cambridge Univ. Press, Cambridge, 1990.
  13. W. Kulpa, On the existence of maps having graphs connected and dense, Fund. Math. 76 (1972), 207-211.
  14. K. Kuratowski and A. Mostowski, Set Theory, Stud. Logic Found. Math. 86, PWN and North-Holland, Warszawa-Amsterdam, 1976.
  15. K. R. Parthasarathy, Probability Measures on Metric Spaces, Academic Press, New York, 1967.
  16. Gy. Targonski, Topics in Iteration Theory, Vandenhoeck & Ruprecht, Göttingen, 1981.
Pages:
223-230
Main language of publication
English
Received
1998-08-27
Accepted
1999-07-01
Published
1999
Exact and natural sciences