Enumeration of ideals of exceptional nilpotent matrix algebrasIn well-known
enumerations of characteristic ideals of the algebra NT(n,K) of all (lower
The enumeration spectrum hierarchy of α-families and lowα degrees is the
enumeration spectrum of a family from the hierarchy. In particular, we show that the collection of non
Some Properties of the Upper Semilattice of Computable Families of Computably Enumerable Sets families of computably
enumerable sets in Ω. It is proved that ideals of minuend and finite families of Ω
Computable Linear Orders and the Ershov Hierarchy exactly all n-computable
enumerable degrees. We also study interconnections of these relations among
Degrees of Enumerations of Countable Wehner-Like FamiliesDegrees of
Enumerations of Countable Wehner-Like Families
A Glazman–Povzner–Wienholtz theorem on graphs to Schrödinger operators on
graphs. We first obtain the corresponding theorem for Schrödinger operators on metric
Irreducible, Singular, and Contiguous Degrees not settled for these. A computably
enumerable Q-degree which consists of one computably
enumerable m