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2008
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13 years 8 months ago
On Aperiodic and Star-Free Formal Power Series in Partially Commuting Variables
Formal power series over non-commuting variables have been investigated as representations of the behavior of automata with multiplicities. Here we introduce and investigate the co...
Manfred Droste, Paul Gastin
STACS
1991
Springer
14 years 1 days ago
On Aperiodic Trace Languages
Formal power series over non-commuting variables have been investigated as representations of the behavior of automata with multiplicities. Here we introduce and investigate the co...
Giovanna Guaiana, Antonio Restivo, Sergio Salemi