Arithmetik, Algebra (427 Artikel)

Filters and ultrafilters over definable subsets of admissible ordinals.- Superinfinitesimals and the calculus of the generalized riemann integral.- Point-picking games and HFD's.- On homomorphism t...

Contiguous R.E. Degrees.- Abstract construction of counterexamples in recursive graph theory.- Minimal degrees and 1-generic sets below 0?.- Undecidability and recursive equivalence II.- Logical sy...

Lectures on proof theory.- Partitions and models.- Klassen rekursiver funktionen.- Hyperarithmetic ultrafilters.- Recursive equivalence: A survey.- Half-ring morphologies.- Formalisations of some ?...

Profinite Graphs and Groups

and preliminaries.- A review of Gentzen's second consistency proof.- The intuitionistic system of number theory.- A formally intuitionistic system as strong as classical analysis.- Transfinite indu...

Properties of Closed 3-Braids and Braid Representations of Links

Real Algebraic Varieties

Levico Terme, Trento 2019

Generators of the recursively enumerable degrees.- Kleene degrees of ultrafilters.- Recursion theory on strongly ?2 inadmissible ordinals.- Applications of the low-basis theorem in arithmetic.- Str...

These proceedings contain research and survey papers from many subfields of recursion theory, with emphasis on degree theory, in particular the development of frameworks for current techniques in t...

The maximal type structure.- The countable functionals.- Ct(n) as a topological space.- Computability vs recursion.- The computable structure on Ct(k).- Sections.- Some further results and topics.

..."The book, written by one of the main researchers on the field, gives a complete account of the theory of r.e. degrees. .... The definitions, results and proofs are always clearly motivated and ...

A Representation Theoretic Perspective

Over the course of his distinguished career, Nicolai Reshetikhin has made a number of groundbreaking contributions in several fields, including representation theory, integrable systems, and topolo...

Over the course of his distinguished career, Nicolai Reshetikhin has made a number of groundbreaking contributions in several fields, including representation theory, integrable systems, and topolo...