TCS
2008
13 years 3 months ago
2008
We introduce an extension of the derivatives of rational expressions to expressions denoting formal power series over partially commuting variables. The expressions are purely non...
LATIN
2004
Springer
13 years 10 months ago
2004
Springer
In this paper we investigate how it is possible to recover an automaton from a rational expression that has been computed from that automaton. The notion of derived term of an expr...