Andre Nies


Picture of Andre Nies
  Prof. André Nies
  Department of Computer Science
  University of Auckland
  Private Bag 92019
  Auckland
  New Zealand

  andre_at_cs_dot_auckland_dot_ac_dot_nz

  +64-9-373 7599 ext.86645

I am an editor for the Annals of Pure and Applied Logic. I invite submissions, at a level comparable to the level of the JSL.

With Katrin Tent and Eamonn O'Brien, I will be organising a research programme "Logic and algorithms in group theory", Sept - Dec 2018 at the Hausdorff Institute for Mathematics in Bonn, Germany.

Oct 16-18 QIT (Quantum Information Theory) Auckland 2017
External Speakers: Marco Tomamichel (UTS, minicourse), Willem Fouche (Unisa), Anuradha Mahasinghe (University of Colombo).
Talks by Cristian Calude and myself.
Marco's script
Marco's slides

Archived pages of previous workshops/retreats I have (co)-organised:
Algorithmic Randomness Interacts with Analysis and Ergodic Theory, Dec 4 -9, 2016 at the Casa Matematica Oaxaca. Organised with Jeremy Avigad and Joseph S. Miller.
Retreat with 8 participants at Calpulalpan de Mendez during Nov 30-Dec 4. Program.

Workshop on the occasion of Jouko Väänänen’s visit to New Zealand , Apr 7-10 at the Research Centre Coromandel. Organised by Sebastian Link and André Nies. Pictures.
Retreat on computability theory and its applications , Feb 18-23 at the Research Centre Coromandel. Workshop on Feb 21. Organised by Noam Greenberg and André Nies. Pictures.
Descriptive set theory and Scott Rank at the Research Centre Coromandel, Dec 15-30, 2014. (Organized by A. Nies)
Retreat and ARA Japan 2014, August 31- Sept 5, Fujinosato, Shizuoka prefecture. (Organized by K. Miyabe and A. Nies). Scientific Programme.
Algorithmic randomness and complexity 2014, Sept 8- 12, National Institute of Informatics, Shonan, Japan. (Organized by R. Downey, K. Miyabe, A. Nies, and O. Watanabe)
ARA South Africa 2014, Feb 10 and 11, Pretoria.
Argentina-Japan-New Zealand workshop (AJNZ) 2013, December 2-3, Auckland.
Analysis, Randomness and Applications (ARA) 2013, Nancy, France.
ARA 2011, Auckland. 


2017 (current) Logic Blog.  Ask me how to participate through a shared folder in the dropbox.

2016 Logic Blog. 
2015 Logic Blog. 
2014 Logic Blog. 
2013 Logic Blog. 
2012 Logic Blog. 
2011 Logic Blog  
2010 Logic Blog

The Logic Blog frontend managed by Dr. Rupert Hoelzl.


My book ''Computability and Randomness'' was published by Oxford University Press Jan 29, 2009. The revised paperback version was published March 2012.
Order at Amazon.

List of errata for the book (Jan 2013).
Status of open problems from the book (NEW! Oct 2017).


Research interests:

Since 2002 I have studied the interplay of computability and randomness.
For an overview of work up to 2010 see Interactions of Computability and Randomness, Proceedings of the International Congress of Mathematicians, 2010. 
For recent work see e.g. Coherent randomness tests and computing the K-trivial sets.  With L. Bienvenu, N. Greenberg, A. Kucera, and D. Turetsky. J. European Math. Society 18 (2016), 773-812.


My recent interests include the connection of randomness to analysis, ergodic theory, set theory (cardinal characteristics), and reverse mathematics. I also work on invariant descriptive set theory, in particular for Polish metric spaces.

I apply logical methods to algebraic structures, especially to groups. A recent paper in this direction: Describing finite groups by short first-order sentences. With Katrin Tent. Israel J. Mathematics, to appear.
I haved studied structures that can be described by automata, or via Borel relations. See my survey papers:
Describing Groups.  Bull. Symb. Logic. 13 no 3 (2007), 305-339
Borel Structures: a brief survey   (with A. Montalban, 2010). Effective Mathematics of the Uncountable, Lecture Notes in Logic 41 (2013), 124-134.  

In earlier papers (1994-2003) I have investigated degree structures using model theoretic methods. See my habilitation thesis Coding Methods in computability theory and complexity theory  for a summary.

For more detail see my publications.
Summary of past research up to 2010. 



Randomness and computability: Open questions.   Version of June 30, 2007 with list of results obtained so far. Published in Bull. Symb. Logic. 12 no 3 (2006) 390-410. Joint with Joe Miller. 




Last modified: October 2017