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Physical Sciences and Mathematics Commons

Open Access. Powered by Scholars. Published by Universities.®

2002

Mathematics

Swarthmore College

Articles 1 - 3 of 3

Full-Text Articles in Physical Sciences and Mathematics

Renewal Systems, Sharp-Eyed Snakes, And Shifts Of Finite Type, Aimee S. A. Johnson, K. M. Madden Mar 2002

Renewal Systems, Sharp-Eyed Snakes, And Shifts Of Finite Type, Aimee S. A. Johnson, K. M. Madden

Mathematics & Statistics Faculty Works

Johnson and Madden look at collections of bi-infinite strings of symbols that occur in several different areas of mathematics and ask whether these collections are the same in some sense. A dynamical systems property called entropy can be used to show that the shifts of finite type are not all conjugate to uniquely decipherable renewal systems.


A Specht Module Analog For The Rook Monoid, Cheryl Grood Jan 2002

A Specht Module Analog For The Rook Monoid, Cheryl Grood

Mathematics & Statistics Faculty Works

The wealth of beautiful combinatorics that arise in the representation theory of the symmetric group is well-known. In this paper, we analyze the representations of a related algebraic structure called the rook monoid from a combinatorial angle. In particular, we give a combinatorial construction of the irreducible representations of the rook monoid. Since the rook monoid contains the symmetric group, it is perhaps not surprising that the construction outlined in this paper is very similar to the classic combinatorial construction of the irreducible Sn-representations: namely, the Specht modules.


Hat Derivatives, Stephen B. Maurer , '67 Jan 2002

Hat Derivatives, Stephen B. Maurer , '67

Mathematics & Statistics Faculty Works

No abstract provided.