| Issue |
RAIRO-Theor. Inf. Appl.
Volume 39, Number 1, January-March 2005
Imre Simon, the tropical computer scientist
|
|
|---|---|---|
| Page(s) | 125 - 131 | |
| DOI | https://doi.org/10.1051/ita:2005007 | |
| Published online | 15 March 2005 | |
Some decision problems on integer matrices
1
L.I.A.F.A, Université Paris VII,
Tour 55-56, 1 étage,
2 pl. Jussieu, 75 251 Paris Cedex, France;
Christian.Choffrut@liafa.jussieu.fr
2
Dept. of Mathematics and TUCS,
University of Turku, 20014 Turku, Finland; Juhani.Karhumaki@cs.utu.fi
Given a finite set of matrices with integer entries, consider the question of determining whether the semigroup they generated 1) is free; 2) contains the identity matrix; 3) contains the null matrix or 4) is a group. Even for matrices of dimension 3, questions 1) and 3) are undecidable. For dimension 2, they are still open as far as we know. Here we prove that problems 2) and 4) are decidable by proving more generally that it is recursively decidable whether or not a given non singular matrix belongs to a given finitely generated semigroup.
Mathematics Subject Classification: 20M05 / 68R15
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.