Past Talks and Events

MIP
2019, member of the poster prize committee.

INFORMS
Computing Society Conference, Jan 68, 2019, Knoxville,
TN, plenary speaker
 IMA year on Open Source Tools for Operations
Research, 2018–2019, coorganizer

ICERM
workshop on Core computational methods (part of
the Nonlinear Algebra program), Sep 17–21, 2018,
invited speaker

Oberwolfach workshop on New Directions in Stochastic
Optimisation, August 19–25, 2018, invited speaker
 ISMP 2018.
 Optimization
and Discrete Geometry: Theory and Practice, 2427 April, 2018
Tel Aviv University, Israel. Invited speaker
 ISCO 2018.
 Bridging
Continuous and Discrete Optimization, Aug. 16 – Dec. 15,
2017, Simons Institute for the Theory of Computing,
Berkeley. Invited Core Participant.
 INFORMS
Annual Meeting, Oct. 22–25, 2017, Houston,
Texas.
 August 2017: Sage
Days: Opening Workshop for a Year of Coding Sprints,
IMA, Minneapolis, August 21–25, 2017. Organizer. (Part of the 2017–2018 IMA
program SageMath Coding Sprints.)
 August 2017: SIAM
Conference on Applied Algebraic Geometry,
July 31–Aug. 4, 2017, Georgia Tech.
Invited minisymposium speaker (Algebraic and
Geometric Methods in Discrete Optimization).
 2017
Mixed Integer Programming Workshop, June 19–22, 2017, HEC
Montréal, Canada. Invited speaker.
 My Ph.D. student Jiawei Wang presented our joint
poster: Structure and Interpretation of DualFeasible
Functions
 My graduating Ph.D. student Yuan Zhou presented our joint
poster: TwoSided Discontinuous CutGenerating Functions in the Gomory–Johnson Model
 BayOpt
2017, dedicated to Professor Roger JB Wets on the occasion
of his 80th birthday, May 12–13, 2017, UC Davis.
Invited speaker.
 Polyhedral
geometry and partition theory, American Institute of
Mathematics, San Jose, California, Nov 711, 2016. Invited
participant; two presentations.
 Sage
Day at UC Davis, October 26, 2016, one presentation.
 Talk in the UC Davis Applied Mathematics seminar, Friday,
Sep 30, 4:10pm: Integer optimization, cutting planes, and computerassisted proofs
 July 2016: ICMS 2016  The 5th
International Congress on Mathematical Software,
Berlin
 Homological and Computational Methods in Commutative
Algebra, Cortona, Italy, May 29June 4, 2016. Invited participant.
 2016
Mixed Integer Programming Workshop, Coral Gables, FL, May
2326, 2016. My
student Yuan
Zhou presented our joint poster Toward
computerassisted discovery and automated proofs of
cutting plane theorems
(Honorable mention in the poster prize competition)
 ECCO XXIX  29th
Conference of the European Chapter on Combinatorial
Optimization, Budapest, Hungary, May 2628, 2016.
Contributed talk: Toward
computerassisted discovery and automated proofs of
cutting plane theorems (with Yuan Zhou)
 ISCO 2016  4th International
Symposium on Combinatorial Optimization,
Vietri sul Mare (Salerno), Italy, May 1618, 2016.

Workshop
on Integer Linear Programming in Computational
Biology, Simons Institute, UC Berkeley, May 9, 2016.

Second Bay
Area Optimization Meeting, UC Berkeley, April 29,
2016.

Modern
Techniques in Discrete Optimization: Mathematics, Algorithms and
Applications, Casa Matemática Oaxaca, November 2015
 International Symposium
on Mathematical Programming, Pittsburgh, July 2015

Oberwolfach workshop on Combinatorial Optimization, Nov. 9 
Nov. 15, 2014
 Visit at ETH Zürich, Nov. 3  Nov. 7, 2014

AMS Fall Sectional Meeting, San Francisco State University, AMS
Special Session on Polyhedral Number Theory, Oct. 2526, 2014

Mixed Integer
Programming 2014 (Ohio State, July 2124, 2014)

IPCO 2014 (Bonn,
Germany, June 2325, 2014)

MixedInteger
Nonlinear Programming (MINLP) 2014 (Carnegie Mellon
University, Pittsburgh, PA, June 25, 2014)

Bay
Area Discrete Mathematics Day (Santa Clara University, April
12, 2014)

18th Combinatorial Optimization Workshop, Aussois, France,
Jan. 5  Jan. 10, 2014

IMS Program
on Inverse Moment Problems at the National University of
Singapore, Nov. 18, 2013  Jan. 25, 2014

Grötschelfest 2013, Cologne, Germany, Sep. 13, 2013

Mixed
Integer Programming workshop (Madison, WI, July 2225, 2013):
invited speaker

SIAM Conference on
Applied Algebraic Geometry (Fort Collins, Colorado,
Aug. 14, 2013): minisymposium speaker

IPCO 2013
(Valparaíso, Chile, March 1820, 2013)
paper: Equivariant Perturbation in Gomory and Johnson's
Infinite Group Problem. II. The Unimodular TwoDimensional
Case

Talk at the Joint Math Meetings (San Diego, Jan. 12,
2013): The GomoryJohnson infinite group problem: A 40year
update
 Colloquium at Georgia Tech (Nov. 2012)
 Colloquium at Santa Clara University (Nov. 2012)
 ISMP 2012 (Berlin, Aug. 2012)
 visit to Nanyang Technological University (Singapore, July/Aug. 2012)
 Workshop on Convex Polytopes (Kyoto,
July 2012)
 Mixed
Integer Programming 2012 at UC Davis, July 16–19, 2012
 Participation in BADMath
Day (San Francisco State),
ISSAC 2011
(San Jose), IPCO
2011 (IBM Yorktown
Heights), Mixed
Integer Programming
2011
(Waterloo), Rocky
Mountain Mathematics Consortium Summer School (U
Wyoming), Discrete
Geometry and Optimization (Fields
Institute), Berkeley
Optimization Day, SIAM
Conf. on Applied Algebraic Geometry (NCSU,
Raleigh, Oct. 2011),
BAD Math
Day (UC Davis)
 Talks on primal integer programming at Arizona State University,
March 29, 2011, and in the
workshop Optimization
in an Uncertain Environment, UC Davis, March 26, 2011
 I participated in the program Modern
Trends in Optimization and Its Application at UCLA's
Institute for Pure & Applied Mathematics, Sep 13Dec 17,
2010. I
coorganized Workshop
III: Discrete Optimization and
gave tutorials in discrete optimization.
 I participated in
the MiniWorkshop:
Exploiting Symmetry in Optimization, at Mathematisches
Forschungsinstitut Oberwolfach, Aug 2228, 2010
 I coorganized (with Jiawang Nie)
the MSRI Summer
Graduate Workshop
Algebraic, Geometric, and Combinatorial Methods for
Optimization, August 213, 2010.
 I coorganized Mixed Integer Programming 2010, Georgia Institute
of Technology, July 2629, 2010
 Talks and sessions at SIAM Annual Meeting, Pittsburgh, July
1217, 2010
 Talk in the Optimization Seminar at U Washington, Seattle, Apr
13, 2010
 Talk
at Berkeley
Optimization Day, March 6, 2010
 Talk at Bay
Area Discrete Math Day, October 17, 2009
 Talk at INFORMS
2009 (San Diego)
 Sep. 9, 2009, The Summation Method for Integer and Continuous Optimization,
AlgebraGeometryCombinatorics Seminar at San Francisco State
University, San Francisco, CA, USA.
 Aug. 26, 2009, The Summation Method for Integer and Continuous Optimization,
International Symposium on Mathematical Programming,
Chicago, IL.
 May 20, 2009, Nonlinear Optimization via Summation and Integration, iCME Linear
Algebra and Optimization Seminar, Stanford University, CA, USA.
 May 1, 2009, Rational generating functions and pure Nash
equilibria of integer programming games
(minitalk), Bay
Algorithmic Game Theory Symposium, UC Berkeley.
 I coorganized the special session Advances in the Theory of Integer Linear
Optimization and its Extensions (17 speakers), AMS 2009 Spring Western Section Meeting, San Francisco, CA, April 2526, 2009
 April 4, 2009, Efficient exact integration of polynomials
over polytopes, AMS
2009 Spring Southeastern Section Meeting, Raleigh, NC.
 Nov. 21, 2008, Nonlinear optimization via summation and integration,
IMA Hot
Topics Workshop: MixedInteger Nonlinear Optimization: Algorithmic
Advances and Applications,
Minneapolis, MN, USA.
 Oct. 4, 2008, An Implementation of the BarvinokWoods Integer
Projection Algorithm, AMS Fall Western Section Meeting,
Vancouver, BC, Canada.
 Sept. 18, 2008, An Implementation of the BarvinokWoods Integer
Projection Algorithm, Minisymposium "Algebraische und geometrische
Kombinatorik", Jahrestagung der Deutschen MathematikerVereinigung 2008,
Erlangen, Germany.
 Aug. 6, 2008, An Implementation of the BarvinokWoods Integer
Projection Algorithm, Mixed Integer Programming, New York, NY,
USA.
 July 15, 2008, An Implementation of the BarvinokWoods Integer
Projection Algorithm, Information Theory and Statistical Learning 2008,
Las Vegas, NV, USA.
 March 5, 2008, Integer Linear and NonLinear Optimization,
Institut für Mathematik, TU Berlin, Germany.
 Feb. 29, 2008, Integer Linear and NonLinear
Optimization, Department of Mathematics, University of
California, Berkeley, CA, USA.
 Feb. 7, 2008, Rational Generating Function Techniques for
Integer Linear and Nonlinear Optimization, RUTCOR, Rutgers
University, New Brunswick, NJ, USA.
 Feb. 5, 2008, Integer Linear and NonLinear
Optimization, Department of Mathematics, University of
California, Davis, CA, USA.
 Jan. 29, 2008, Rational Generating Function Techniques for
Integer Linear and Nonlinear Optimization, Combinatorics and
Optimization Department, University of Waterloo, Canada.
 Dec. 7, 2007, The Computation of Ehrhart Polynomials of
Matroid Polytopes, Sächsischer
Geometrietag, Magdeburg, Germany.
 Nov. 17, 2007, The Computation of Ehrhart Polynomials of
Matroid Polytopes, Colloquium on
Combinatorics, Magdeburg, Germany.
 Nov. 5, 2007, New Rational Generating Function Techniques for
Integer
Programming, INFORMS Annual
Meeting, Seattle, WA, USA.
 Nov. 2, 2007, Rational Generating Function Techniques for Integer Linear and
Nonlinear Optimization, Sauder School of Business, University of British
Columbia, Vancouver, BC, Canada.
 Oct. 31, 2007, Minimal Generating Families of Parametric Discrete
and Polyhedral Sets with Applications to Survivable Network Design,
Operations
Research Seminar, Simon Fraser University, Surrey, BC,
Canada.
 Oct. 30, 2007, Ehrhart Polynomials of Matroid Polytopes,
Discrete
Mathematics Seminar, Simon Fraser University, Burnaby, BC,
Canada.
 Oct. 27, 2007, Pareto Optima of Multicriteria Integer Linear
Programs, West Coast
Optimization Meeting, Kelowna, BC, Canada.
 October 8, 2007, The Computation of Ehrhart Polynomials of
Matroid Polytopes, Discrete
Mathematics & Representation Theory seminar, University of
California, Davis, CA, USA.
 September 7, 2007,
Computing Parametric Counting Functions
using Exact HalfOpen Decompositions of Polyhedra,
Algebra–Geometry–Combinatorics
Seminar, San Francisco State University, San Francisco, CA, USA.
 July 2, 2007,
Counting Lattice Points in Polytopes with a New Version of
LattE ("Macchiato"), Special Algebraic Statistics Seminar,
University of California, Berkeley, CA, USA.
 I organized (jointly with Oktay Günlük, Andrew Miller,
and JeanPhilippe P. Richard) the workshop
Mixed Integer Programming 2007, Montreal, Canada
 June 1, 2007,
New Variants of Barvinok's Algorithm for Computing the Ehrhart
Series of Rational Polytopes.
Discrete
Mathematics & Representation Theory seminar, University of
California, Davis, CA, USA.
 April 24, 2007,
Integer Minkowski Programs and Network Survivability.
INOC 2007
(International Network Optimization Conference), Spa, Belgium.
 November 16, 2006,
A Primal Variant of Barvinok's Algorithm
Based on Irrational Signed Decompositions.
Kolloquium
über Kombinatorik, University of Magdeburg, Germany.
 September 8, 2006,
Fully PolynomialTime Approximation Schemes for MixedInteger
Polynomial Optimization in Fixed Dimension. Operations Research
2006, Karlsruhe, Germany.
 July 31, 2006, FPTAS for MixedInteger Polynomial Optimization in
Fixed Dimension. International Symposium on Mathematical
Programming, Rio de Janeiro, Brazil.
 June 6, 2006, Intermediate Integer Programming Representations using Value
Disjunctions. MIP 2006, Miami, FL,
USA.
 May 31, 2006, A Primal Variant of Barvinok's Algorithm
based on irrational signed decompositions. IBM
T. J. Watson Research Center, Yorktown Heights, NY, USA.
 May 19, 2006, Atomic Fibers, Integer Minkowski Programs, and the Design of
Survivable Networks. 9th France
Télécom Seminar on Optimization and Decision Aid,
Nice, France.
 April 21, 2006, FPTAS for MixedInteger Polynomial Optimization with a
Fixed Number of Variables. Optimization Seminar, University
of California, Davis, CA, USA.
 March 24, 2006, FPTAS for MixedInteger Polynomial Optimization with a
Fixed Number of Variables. Algebra–Geometry–Combinatorics
Seminar, San Francisco State University, San Francisco, CA, USA.
 January 23, 2006, FPTAS for MixedInteger Polynomial Optimization with a
Fixed Number of Variables. ACMSIAM
Symposium on Discrete Algorithms (SODA06), Miami, FL, USA.
 December 19, 2005, FPTAS for Polynomial Optimization in
Fixed Dimension.
Optimization seminar, TU Darmstadt, Germany.
 March 16, 2005, Towards PrimalDual Integer Programming.
9th Combinatorial
Optimization Workshop, Aussois, France.
 June 15, 2004, A CutReformulateAugmentBranch Algorithm for Integer
Programming, Center for Operations Research
and Econometrics (CORE), Université catholique de
Louvain, LouvainlaNeuve, Belgium.
 November 15, 2003, Integer Programming with Group
Relaxations.
Colloquium on
Combinatorics, Magdeburg, Germany.
 September 3, 2003, Exact Primal Algorithms for General Integer and
MixedInteger Linear Programs,
OR 2003
(Symposium on Operations Research),
Heidelberg, Germany.
 August 21, 2003, The Integral Basis Method and
extensions, International Symposium on Mathematical Programming,
Copenhagen, Denmark.
 March 12, 2003, The Integral Basis Method and
extensions to mixedinteger programming, 7th Combinatorial
Optimization Workshop, Aussois, France.
 February 11, 2003, The Integral Basis Method and
Extensions to MixedInteger Programming,
Center for Operations Research
and Econometrics (CORE), Université catholique de
Louvain, Belgium.
 June 17, 2002, Primal (Mixed) Integer Programming,
"Geometric Convex Combinatorics" workshop, Oberwolfach, Germany.
 May 15, 2002, A Primal AllInteger Integer Programming
Algorithm Based on Irreducible Solutions, 15th Workshop on
Discrete Optimization, Wittenberg, Germany.
 March 15, 2001, The Integral Basis Method for Integer
Programming, DONET Short
Course on Primal Integer Programming at Istituto di Analisi dei Sistemi ed
Informatica (IASI), Roma, Italy.
 September 10, 2000, Integral Decomposition of Polyhedra and Some
Applications in Mixed Integer Programming, Symposium on
Operations Research 2000, TU Dresden, Germany.
 May 25, 2000, Integral Decomposition of Polyhedra and Test Sets for
MixedInteger Programs, 14th Workshop
on Discrete Optimization, Holzhau, Germany.
 March 15, 2000, Integral Decomposition of Polyhedra and Test Sets for
MixedInteger Programs, Fourth
Workshop on Combinatorial Optimization, Aussois, France.
Matthias
Koeppe (home page)