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ON SEMIGROUP ORBITS OF POLYNOMIALS AND MULTIPLICATIVE ORDERS

Published online by Cambridge University Press:  20 February 2020

JORGE MELLO*
Affiliation:
School of Mathematics and Statistics,University of New South Wales, Kensington, NSW 2052, Australia email [email protected]

Abstract

We show, under some natural restrictions, that some semigroup orbits of polynomials cannot contain too many elements of small multiplicative order modulo a large prime $p$, extending previous work of Shparlinski [‘Multiplicative orders in orbits of polynomials over finite fields’, Glasg. Math. J.60(2) (2018), 487–493].

Type
Research Article
Copyright
© 2020 Australian Mathematical Publishing Association Inc.

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Footnotes

For this research, the author was supported by the Australian Research Council Grant DP180100201.

References

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Ostafe, A. and Young, M., ‘On algebraic integers of bounded house and preperiodicity in polynomial semigroup dynamics’, Preprint, 2018, arXiv:1807.11645.CrossRefGoogle Scholar
Shparlinski, I. E., ‘Multiplicative orders in orbits of polynomials over finite fields’, Glasg. Math. J. 60(2) (2018), 487493.CrossRefGoogle Scholar