Publications Meetings The Profession Membership Programs Math Samplings Policy & Advocacy In the News About the AMS
|
   
Available in electronic format
Available in print format
Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(e) ISSN 0002-9939(p)

     

Rational functions with linear relations

Author(s): Ariane M. Masuda; Michael E. Zieve
Journal: Proc. Amer. Math. Soc. 136 (2008), 1403-1408.
MSC (2000): Primary 39B12; Secondary 12E05, 30D05
Posted: December 7, 2007
MathSciNet review: 2367113
Retrieve article in: PDF

Abstract | References | Similar articles | Additional information

Abstract: We find all polynomials $ f,g,h$ over a field $ K$ such that $ g$ and $ h$ are linear and $ f(g(x))=h(f(x))$. We also solve the same problem for rational functions $ f,g,h$, in case the field $ K$ is algebraically closed.


References:

1.
G. af Hällström, Uber halbvertauschbare Polynome, Acta Acad. Abo. 21, 1955, no. 2, 20 pp. MR 0084595 (18:887a)

2.
-, Uber Halbvertauschbarkeit zwischen linearen und allgemeineren rationalen Funktionen, Math. Japon., 4, 1957, 107-112 MR 0098740 (20:5195)

3.
I. N. Baker and A. Erëmenko, A problem on Julia sets, Ann. Acad. Sci. Fenn., 12, 1987, 229-236 MR 951972 (89g:30047)

4.
R. M. Beals and M. E. Zieve, Decompositions of polynomials, preprint, 2007.

5.
G. Eigenthaler and W. Nöbauer, Über die mit einem Polynom vertauschbaren linearen Polynome, Österreich. Akad. Wiss. Math.-Natur. Kl. Sitzungsber. II, 199, 1990, 143-153 MR 1119733 (93e:13012)

6.
A. È. Erëmenko, Some functional equations connected with the iteration of rational functions, Algebra i Analiz, 1, 1989, 102-116; English transl., Leningrad Math. J., 1, 1990, 905-919 MR 1027462 (90m:30030)

7.
P. Fatou, Sur l'iteration analytique et les substitutions permutables, J. Math. Pures Appl. (9), 2, 1923, 343-384

8.
G. Julia, Mémoire sur la permutabilité des fractions rationnelles, Ann. Acad. École Norm. Sup., 39, 1922, 131-215 MR 1509242

9.
G. M. Levin and F. Przytycki, When do two rational functions have the same Julia set?, Proc. Amer. Math. Soc., 125, 1997, 2179-2190 MR 1376996 (97i:58149)

10.
G. L. Mullen, Polynomials over finite fields which commute with linear permutations, Proc. Amer. Math. Soc., 84, 1982, 315-317 MR 640221 (83m:12027)

11.
H. G. Park, Polynomials satisfying $ f(x+a)=f(x)+c$ over finite fields, Bull. Korean Math. Soc., 29, 1992, 277-283 MR 1180621 (94d:11098)

12.
J. F. Ritt, On the iteration of rational functions, Trans. Amer. Math. Soc., 21, 1920, 348-356 MR 1501149

13.
-, Prime and composite polynomials, Trans. Amer. Math. Soc., 23, 1922, 51-66 MR 1501189

14.
-, Permutable rational functions, Trans. Amer. Math. Soc., 25, 1923, 399-448. MR 1501252

15.
C. Wells, Polynomials over finite fields which commute with translations, Proc. Amer. Math. Soc., 46, 1974, 347-350. MR 0347785 (50:286)

Similar Articles:

Retrieve articles in Proceedings of the American Mathematical Society with MSC (2000): 39B12, 12E05, 30D05

Retrieve articles in all Journals with MSC (2000): 39B12, 12E05, 30D05


Additional Information:

Ariane M. Masuda
Affiliation: School of Mathematics and Statistics, Carleton University, 1125 Colonel By Drive, Ottawa, ON K1S 5B6, Canada
Address at time of publication: Department of Mathematics and Statistics, University of Ottawa, Ottawa, ON K1N 5B6, Canada
Email: amasuda@uottawa.ca

Michael E. Zieve
Affiliation: Center for Communications Research, 805 Bunn Drive, Princeton, New Jersey 08540
Email: zieve@math.rutgers.edu

DOI: 10.1090/S0002-9939-07-09246-5
PII: S 0002-9939(07)09246-5
Keywords: Functional equation, commuting rational functions
Received by editor(s): February 15, 2007
Posted: December 7, 2007
Additional Notes: The authors thank Bob Beals, Alan Beardon, Alex Erëmenko, and Patrick Ng for useful correspondence.
Communicated by: Wen-Ching Winnie Li
Copyright of article: Copyright 2007, American Mathematical Society
The copyright for this article reverts to public domain after 28 years from publication.




AMS and Social Media LinkedIn Facebook Podcasts Twitter YouTube RSS Feeds Blogs Wikipedia