Incomparable Elements in Algebraic Lattices with an Application to AFL-theory

P.R.J. Asveld

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    Two special types of algebraic (or compactly generated) lattices, called GG- and GH-lattice, are introduced. These lattices are uncountable, and each element in these lattices (apart from the zero and unit) has an incomparable element. The main results characterize those elements which have a largest incomparable element. Then two particular kinds of algebras, called GG- and GH-algebra, are defined and it is shown that the lattice of subalgebras of a GG-algebra [GH-algebra] is a GG-lattice [GH-lattice]. Finally, some applications to the theory of Abstract Families of Languages (or AFL) are discussed.
    Original languageUndefined
    Place of PublicationEnschede
    PublisherUniversity of Twente, Department of Applied Mathematics
    Number of pages34
    Publication statusPublished - 1978


    • HMI-SLT: Speech and Language Technology
    • EWI-3715

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