Search Results
Periodica Mathematica Hungarica
Authors:
D. Jones
and
M. Lawson
Abstract
This paper was inspired by a monograph by Bratteli and Jorgensen, and the work of Kawamura. We introduce two new semigroups:
a wide inverse submonoid of the polycyclic inverse monoid, called the gauge inverse monoid, and a Zappa-Szép product of an
arbitrary free monoid with the free monoid on one generator. Both these monoids play an important role in studying arbitrary,
not necessarily transitive, strong actions of polycyclic inverse monoids. As a special case of such actions, we obtain some
new results concerning the strong actions of P
2 on ℤ determined by the choice of one positive odd number. We explain the role played by Lyndon words in characterising these
repesentations and show that the structure of the representation can be explained by studying the binary representations of
the numbers \documentclass{aastex}
\usepackage{amsbsy}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{bm}
\usepackage{mathrsfs}
\usepackage{pifont}
\usepackage{stmaryrd}
\usepackage{textcomp}
\usepackage{upgreek}
\usepackage{portland,xspace}
\usepackage{amsmath,amsxtra}
\pagestyle{empty}
\DeclareMathSizes{10}{9}{7}{6}
\begin{document}
$$\frac{1}
{p},\frac{2}
{p}, \ldots \frac{{p - 1}}
{p}$$
\end{document} . We also raise some questions about strong representations of the polycyclic monoids on free abelian groups.
Studia Scientiarum Mathematicarum Hungarica
Authors:
Dijana Mosić
and
Dragan S. Djordjević
We investigate some equivalent conditions for the reverse order laws (ab)# = b † a # and (ab)# = b # a † in rings with involution. Similar results for (ab)# = b # a* and (ab)# = b*a # are presented too.
Periodica Mathematica Hungarica
Author:
Mark Lawson
Abstract
We characterise the maximal proper closed inverse submonoids of the polycyclic inverse monoids, also known as Cuntz inverse semigroups, and so determine all their primitive partial permutation representations. We relate our results to the work of Kawamura on certain kinds of representations of the Cuntz C*-algebras and to the branching function systems of Bratteli and Jorgensen.
