Approximation diophantienne et distances ultramétriques non standard
Diophantische Gleichungen und die universelle Eigenschaft Finslerscher Zahlen.
Functorial concepts of complexity for finite automata.
Kneser’s theorem for upper Banach density
Suppose is a set of non-negative integers with upper Banach density (see definition below) and the upper Banach density of is less than . We characterize the structure of by showing the following: There is a positive integer and a set , which is the union of arithmetic sequences [We call a set of the form an arithmetic sequence of difference and call a set of the form an arithmetic progression of difference . So an arithmetic progression is finite and an arithmetic sequence...
Models of arithmetic and the 1-3-1 lattice
Nicht-Standardmodelle der Zahlentheorie.
Nonstandard arithmetic of iterated polynomials.
On expansions of β-models
On some problems in
Ordered ultraconnected rings
The nonabsolute boundedness model of the theory of semisets
Относительно стандартные элементы в теории внутренних множеств Е.Нельсона.