dcreutz.com | Talks

Darren Creutz

Senior Lecturer (Continuing track, Graduate faculty), Vanderbilt University

dcreutz@dcreutz.com

Talks

Harmonic Functions on Compactly Generated Groups Vanderbilt University 12 Sep 2025
Subshifts of Non-Superlinear Word Complexity cannot be Mixing Vanderbilt University 17 Jan 2025
Word Complexity of Partially Mixing Symbolic Dynamical Systems Vanderbilt University 25 Oct 2024
Symbolic Dynamics: Connecting short-term and long-term complexity in dynamical systems Vanderbilt University Colloquium 17 Oct 2024
Adelic Subshifts Pennsylvania State University 29 Mar 2024
Adelic Structure of Low Complexity Subshifts Vanderbilt University 22 Mar 2024
Mixing Properties of Subshifts and Word Complexity Cutoffs University of Denver Colloquium 8 Mar 2024
Actions of Lattices in Semisimple Lie Groups University of Denver 1 Mar 2024
Word Complexity Cutoffs for Mixing Properties of Subshifts University of California: San Diego 8 Feb 2024
Word Complexity Cutoffs for Mixing Properties of Subshifts Pennsylvania State University 12 Dec 2023
Actions of Lattices in Semisimple Lie Groups Pennsylvania State University 8 Dec 2023
Subshift Word Complexity and Mixing Properties University of Denver 14 Nov 2023
Workshop on Low Complexity Dynamical Systems (co-organizer) University of Maryland 2-6 Oct 2023
Low Complexity Systems U.S. Naval Academy 18 Apr 2023
Word Complexity Cutoffs for Mixing Properties of Subshifts University of Maryland 13 Oct 2022
Word Complexity Cutoffs for Mixing Properties of Subshifts U.S. Naval Academy 3 Oct 2022
Word Complexity of Rank-One Subshifts University of Denver 26 May 2022
Low Complexity Subshifts admitting Mixing Measures AMS Special Session on Zero-Dimensional Dynamics, University of Denver (Virtual) 14 May 2022
Mixing Subshifts with Low Word Complexity Univeristy of Virginia 11 May 2022
Low Complexity Subshifts U.S. Naval Academy 11 Apr 2022
Continuous Actions of Lattices (in Higher-Rank Semisimple Groups) are Free U.S. Naval Academy 14 Oct 2021
Continuous Actions of Lattices (in Higher-Rank Semisimple Groups) are Free University of Maryland 30 Sep 2021
Complexity from Simplicity: Dimensions, Fractals and Chaos U.S. Naval Academy (online) 23 Feb 2021
Ergodic Theory: The Mathematics of Experiment, Probability and Time Colloquium, U.S. Naval Academy 13 Nov 2019
Mixing of Stochastic Staircase Transformations U.S. Naval Academy 21 Oct 2019
Fractals and Dimension Annapolis Civitan Club 15 Aug 2019
Mathematical Existence: A Philosophical Discussion U.S. Naval Academy 16 Apr 2019
Harmonicity and energy of cocycles: (T) without ultraproducts nor conditionally negative type University of Virginia 5 Apr 2019
Rigidity for actions and characters of lattices (in products of Lie groups) Colloquium, University of Virginia 4 Apr 2019
Relative Entropy and an Entropy Gap for Some Groups Without (T) Purdue University 15 Feb 2019
How discontinuous can an integrable function be? U.S. Naval Academy 22 Jan 2019
Completeness, Incompleteness, Consistency and Independence: Gödel's revolutionizing of logic U.S. Naval Academy 11 Oct 2018
Amenability of Stationary Actions of Lattices Vanderbilt University 6 Apr 2018
Amenability of Stationary Actions of Lattices University of Virginia 30 Mar 2018
A (potential) topological/C*-algebra approach to rigidity for lattices (joint w/ M. Kalantar) U.S. Naval Academy 5 Mar 2018
Stationary Actions of Lattices Brazos Analysis Seminar, University of Houston 4 Nov 2017
Relativized Furstenberg Entropy and an Information Theory of Joinings U.S. Naval Academy 16 Oct 2017
Set Theory Past ZFC: Large Cardinals, Forcing, and Independence U.S. Naval Academy 3 Apr 2017
The Normal Subgroup Theorem for Lattices in Products (Property (T)) U.S. Naval Academy 6 Feb 2017
The Normal Subgroup Theorem for Lattices in Products (Amenability) U.S. Naval Academy 23 Jan 2017
Random Walks and Harmonic Functions on Groups U.S. Naval Academy 7 Nov 2016
Ergodic Actions of Lattices in Higher-Rank Semisimple Groups University of Maryland 6 Oct 2016
Mixing and Rank-One Transformations U.S. Naval Academy 3 Oct 2016
Character Rigidity for Lattices in Lie Groups U.S. Naval Academy 26 Aug 2016
Rigidty Theory of Lattices in Semisimple Groups U.S. Naval Academy 3 Feb 2016
The Information Theory of Joinings Vanderbilt University 22 Jan 2016
Harmonic Maps on Groups and Property (T) Noncommutative Geometry and Operator Algebras Spring Institute 6 May 2015
Co-Organizer, Special Session: Classification Problems in Operator Algebras AMS Joint Mathematics Meetings 11 Jan 2015
Operator-Algebraic Superrigidity for Lattices AMS Special Session on Classification Problems in Operator Algebras, Baltimore Maryland 15 Jan 2014
Operator Algebraic Superrigidity for Lattices and Commensurators Northwestern University 3 Dec 2013
Rigidity for Characters on Lattices and Commensurators Vanderbilt University 30 Oct 2013
Character Rigidity for Lattices and Commensurators Vanderbilt University 27 Sep 2013
Stabilizers of Ergodic Actions of Product Groups and Lattices in Products Shanks Workshop on von Neumann Algebras and Ergodic Theory, Vanderbilt University 28 Apr 2013
Stabilizers of Actions of Groups and Invariant Random Subgroups Vanderbilt University 26 Apr 2013
Stabilizers of Actions of Product Groups and Lattices in Product Groups Vanderbilt University 5 Apr 2013
Mixing on Rank-One Transformations Vanderbilt University 25 Jan 2013
Stabilizers of Ergodic Actions of Lattices and Commensurators University of California: San Diego 16 Nov 2012
Poisson Boundaries, Harmonic Functions and Random Walks on Groups Vanderbilt University 9 Nov & 5 Dec 2012
Stabilizers of Ergodic Actions of Lattices and Commensurators Vanderbilt University 19 Sep 2012
Stabilizers of Ergodic Actions of Lattices and Commensurators Williams College Ergodic Theory Conference 28 Jul 2012
Stabilizers of Ergodic Actions of Lattices and Commensurators UCLA Workshop on von Neumann Algebras and Ergodic Theory 26 May 2012
Stabilizers for Ergodic Actions of Commensurators Vanderbilt University 6 Apr 2012
The Property (T) “Half” of the Margulis-Zimmer Conjecture Vanderbilt University 29 Feb 2012
Property (T) for Certain Totally Disconnected Groups Related to a Conjecture of Margulis and Zimmer Vanderbilt University 17 Feb 2012
SAT Actions and Rigidity of Lattices Vanderbilt University 30 Nov 2011
Normal Subgroups of Commensurators of Lattices Vanderbilt University 9 Nov 2011
Normal Subgroups of Commensurators and Rigidity of SAT Actions Vanderbilt University 26 Aug & 2 & 9 Sep 2011
Dynamics of SAT Actions CalTech 2 May 2011
Normal Subgroups of Commensurators and Rigidity of SAT Actions University of California: Los Angeles 6 Apr & 13 Apr 2011
Normal Subgroups and Rigidity for Commensurators Vanderbilt University 28 Feb 2011
Quasi-Invariant Group Actions University of California: Los Angeles 18 Feb 2011
Normal Subgroups of Commensurators and SAT Actions CalTech 20 Jan 2011
A Normal Subgroup Theorem for Commensurators Yale University 15 Nov 2010
Mixing, Random Sequences and Rank-One Transformations Northwestern University 9 Nov 2010
Normal Subgroup and Factor Theorems for Commensurators University of Illinois: Chicago 8 Nov 2010
A Normal Subgroup Theorem for Commensurators of Lattices AMS Western Meeting 9 Oct 2010
Superstability and Finite-Time Extinction for Semigroups University of California: Los Angeles 27 Apr 2010
Poisson Boundaries and Their Applications University of California: Los Angeles Jan 2009
Rank-One Actions, Mixing and Singular Spectra University of California: Los Angeles Mar 2007