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
    Number of pages34
    Publication statusPublished - 1978


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

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