Talks & Posters

Peer Reviewed Conference Talks

July 5, 2016 "FPSAC '16", Simon Fraser University, Vancouver, Canada.
Intersections of Amoebas (poster presentation)
June 18, 2015 "MEGA 2015", University of Trento, Italy.
Norms of Roots of Trinomials
June 15, 2015 "MEGA 2015", University of Trento, Italy.
Amoebas, Nonnegative Polynomials and Sums of Squares Supported on Circuits
June 5, 2013 "MEGA 2013", Goethe University, Frankfurt/Main, Germany.
Separating Inequalities for Nonnegative Polynomials that Are not Sums of Squares
May 31, 2011 "MEGA 2011", Stockholm University, Sweden.
Approximation of Amoebas and Coamoebas by Sums of Squares (poster presentation)

Invited Conference Talks

Dec 12-14, 2018 Workshop "Applied Algebraic Geometry", Bristol, UK.
TBA
July 9-13, 2018 Session "Theory of Convex Optimization" at the 2018 SIAM Annual Meeting in Portland, OR, USA.
TBA
Nov. 14, 2017 Session "Hierarchies of Certified Convex Programs for Polynomial Systems" at the PGMO Days 2017, EDF'Lab Paris-Saclay, France.
TBA
Aug. 4, 2017 Minisymposium "Semidefinite Optimization and Convex Algebraic Geometry" at the 2017 SIAM Conference on Applied Algebraic Geometry, Atlanta, GA.
The Relation between SOS and SONC
July 11, 2017 Workshop "Computational Algebraic Geometry" at FoCM 2017, Barcelona, Spain.
A Positivstellensatz for Sums of Nonnegative Circuit Polynomials
May 22-25, 2017 "2017 SIAM Conference on Optimization", Vancouver, Canada.
Cancelled due to move to Germany
Nov. 14, 2016 "INFORMS Annual Meeting", Nashville, TN.
New Certificates for Nonnegativity via Circuit Polynomials
Nov. 12, 2016 AMS special session on "Applied Algebraic Geometry", NCSU, Raleigh, NC.
New Certificates for Nonnegativity via Nonnegative Circuit Polynomials
May 4, 2016 "Eighth Discrete Geom. and Algebr. Combinatorics Conf.", South Padre Island, TX.
New Certificates for Nonnegativity via Circuit Polynomials and Geometric Programming
April 9, 2016 "Meeting on Algebraic Geometry for Applications", Clemson University, SC.
New Certificates for Nonnegativity via Circuit Polynomials and Geometric Programming
Aug. 4, 2015 "SIAM Conference on Applied Algebraic Geometry", NIMS & KAIST, Deajeon, South Korea.
Roots of Trinomials from the Viewpoint of Amoeba Theory
May 29, 2015 "Workshop on NonLinear Algebra", Academy of Sciences and Humanity, Berlin, Germany.
Computing Amoebas
May 1, 2015 "Tropical Aspects in Geometry, Topology and Physics", MFO, Oberwolfach, Germany.
Amoebas, Nonnegative Polynomials and Sums of Squares Supported on Circuits
June 27, 2014 "Tropical Dibbelabbes", Saarland University, Saarbrücken, Germany.
Amoebas, Nonnegative Polynomials and Sums of Squares Supported on Circuits
Sep. 3, 2013 "Tropical Geometry and Topology", MPI, Bonn, Germany.
Roots of Trinomials from the Viewpoint of Amoeba Theory
July 30, 2011 "4th PhD-students Conference on Tropical Geometry", Technische Universität Kaiserslautern, Germany.
The Configuration Space of Amoebas with Barycentric Simplex Newton Polytope
Oct. 2, 2009 "DMV-Studierendenkonferenz", Ruhr Universität, Bochum, Germany.
Polytopes with Special Simplices
Dec. 11, 2009 "1st PhD-students Conference on Tropical Geometry", Technische Universität Berlin, Germany.
Amoebas of Genus at Most One

Further Conference Talks

Sep. 25-28, 2017 "First annual meeting of the DFG collaborative research center SFB-TRR 195", RWTH Aachen, Germany.
Lopsided Amoeba Approximation
Aug. 2, 2017 "SIAM Conference on Applied Algebraic Geometry", Atlanta, GA.
Current Key Problems on Sums of Nonnegative Circuit Polynomials
June 10, 2017 Workshop "Polynomials and Polytopes", Technische Universität Berlin, Germany.
A New Approach to Nonnegativity and Polynomial Optimization
July 26, 2016 "XXI Coloquio Latinoamericano de Álgebra", Universidad de Buenos Aires, Argentina.
Intersections of Amoebas (poster presentation)
April 2, 2016 "TAGS 2016", University of Texas at Austin, TX.
Intersections of Amoebas (poster presentation)
Jan. 9, 2016 "Joint Mathematics Meeting", Seattle, WA.
Nonnegative Polynomials and Sums of Squares Supported on Circuits
Nov. 7, 2015 "TGTC '15", Rice University, Houston, TX.
Norms of Roots of Trinomials (poster presentation)
Apr. 11, 2015 "TAGS 2015", Texas A&M University, College Station, TX.
Norms of Roots of Trinomials (poster presentation)
March 15, 2014 Annual conference of the DFG priority project SPP 1489 "Algorithmic and experimental methods in algebra, geometry, and number theory", Bad Boll, Germany.
Amoebas, Nonnegative Polynomials and Sums of Squares Supported on Circuits
Sep. 25, 2013 "ÖMG-DMV Congress 2013", University of Innsbruck, Austria.
Roots of Trinomials from the Viewpoint of Amoeba Theory
Sep. 18, 2012 "DMV-Jahrestagung", Saarland University, Saarbrücken, Germany.
Tropical Approaches to Amoebas Supported on a Circuit
April 2, 2012 Workshop "Tropical Geometry", ICMS, Edinburgh, Scotland.
The Configuration Space of Amoebas (poster presentation)
Nov. 12, 2010 "Kolkom 2010", MPI, Saarbrücken, Germany.
Polytopes with Special Simplices

Research Seminar Talks

Nov 20, 2017 Graduiertenkolleg: "Methods for Discrete Structures", Technische Universität Berlin, Germany.
TBA
Aug 23, 2017 Discrete Mathematics and Geometry Seminar, Technische Universität Berlin, Germany.
Intersections of Amoebas
July 14, 2017 Applied Mathematic Seminar, Universität Bonn, Germany.
A New Approach to Nonnegativity and Polynomial Optimization
Feb 17, 2017 Geometry Seminar, Texas A&M University, College Station, TX.
Constrained Polynomial Optimization via SONCs and Relative Entropy Programming
Feb 17, 2017 Algebra & Combinatorics Seminar, Texas A&M University, College Station, TX.
A Positivstellensatz for Sums of Nonnegative Circuit Polynomials
Feb 7, 2017 Junior Algebra & Geometry Seminar, Texas A&M University, College Station, TX.
An Introduction to Tropical Geometry
Nov 25, 2016 Discrete Geometry Seminar, Freie Universität Berlin, Germany.
A New Approach to Nonnegativity and Polynomial Optimization
Nov 24, 2016 Discrete and Algorithmic Geometry Seminar, Technische Universität Berlin, Germany.
A New Approach to Nonnegativity and Polynomial Optimization
April 8, 2016 Algebraic Geometry and Number Theory Seminar, Clemson University, SC.
Intersections of Amoebas
March 16, 2016 Algebra Seminar, Universidad de Los Andes, Bogotá, Colombia.
An Introduction to Amoeba Theory and Intersections of Amoebas
Feb. 16, 2016 Junior Algebra & Geometry Seminar, Texas A&M University, College Station, TX.
An Introduction to Tropical Geometry
Feb. 11, 2016 Scientific and Statistical Computing Seminar, University of Chicago, IL.
New Certificates for Nonnegativity via Circuit Polynomials and Geometric Programming
Feb. 4, 2016 FRAGMENT Seminar, Colorado State University, Fort Collins, CO.
An Introduction to Amoeba Theory and Intersections of Amoebas
Feb. 3, 2016 Joint FRAGMENT and Poisson Geometry Seminar, University of Colorado at Boulder, CO.
New Certificates for Nonnegativity via Circuit Polynomials and Geometric Programming
Jan. 29, 2016 Algebra and Combinatorics Seminar, Texas A&M University, College Station, TX.
Intersections of Amoebas
Oct. 6, 2015 Algebra Seminar, Emory University, Atlanta, GA.
Roots of Trinomials from the Viewpoint of Amoeba Theory
Oct. 5, 2015 Algebra Seminar, Georgia Tech, Atlanta, GA.
Amoebas, Nonnegative Polynomials and Sums of Squares Supported on Circuits
Sep. 15, 2015 Algebraic Geometry and Number Theory Seminar, Rice University, Houston, TX.
Nonnegative Polynomials and Sums of Squares Supported on Circuits
June 26, 2015 CAKE Seminar, Universität Osnabrück, Germany.
An Introduction to Amoeba Theory
June 11, 2015 Oberseminar Algebraische Geometrie, Universität Augsburg, Germany.
Roots of Trinomials from the Viewpoint of Amoeba Theory
March 6, 2015 Algebra and Combinatorics Seminar, Texas A&M University, College Station, TX.
A Sharp Upper Bound for the Complexity of Labeled Oriented Trees
Feb. 19, 2015 Number Theory Seminar, University of Texas at Austin, TX.
Nonnegative Polynomials and Sums of Squares Supported on Circuits
Feb. 16, 2015 Geometry Seminar, Texas A&M University, College Station, TX.
The Boundary of Amoebas
Sep. 30, 2014 Student Working Seminar in Discrete Math., Texas A&M University, College Station, TX.
An Introduction to Amoeba Theory
Sep. 29, 2014 Geometry Seminar, Texas A&M University, College Station, TX.
Amoebas, Nonnegative Polynomials and Sums of Squares Supported on Circuits
Sep. 23, 2014 Student Working Seminar in Discrete Math., Texas A&M University, College Station, TX.
An Introduction to Tropical Geometry
June 5, 2014 Discrete Geometry Seminar, Freie Universität Berlin, Germany.
Nonnegative Polynomials and Sums of Squares Supported on Circuits
Jan. 28, 2014 Research Group "Polyhedral Surfaces", Technische Universität Berlin, Germany.
An Introduction to Amoeba Theory
Jan. 28, 2014 AG Diskrete Mathematik, Goethe University, Frankfurt/Main, Germany.
The Boundary of Amoebas
Jan. 15, 2014 Oberseminar: Optimierung, Geometrie und diskrete Math., Universität zu Köln, Germany.
Amoebas, Nonnegative Polynomials and Sums of Squares Supported on Circuits
Dec. 5, 2013 Oberseminar Algebraische Geometrie und Computeralgebra, Saarland University, Saarbrücken, Germany.
The Boundary of Amoebas
July 12, 2013 AG Diskrete Mathematik, Goethe University, Frankfurt/Main, Germany.
Contemporary Key Problems in Amoeba Theory
Oct. 28, 2012 PhD-students seminar, Goethe University, Frankfurt/Main, Germany.
An Introduction to Amoeba Theory
June 27, 2012 AG & Oberseminar Diskrete Mathematik, Goethe University, Frankfurt/Main, Germany.
Roots of Trinomials from the Viewpoint of Amoeba Theory
June 8, 2012 Working group algebra and combinatorics, CWI, Amsterdam, The Netherlands.
Separating Inequalities for Nonnegative Polynomials that Are not Sums of Squares
June 6, 2012 Séminaire de Géométrie Tropicale, Université Pierre et Marie Curie (Paris 6), Paris, France.
Roots of Trinomials from the Viewpoint of Amoeba Theory
May 23, 2012 Oberseminar "Kombinatorik und Algebra", Philipps-Universität, Marburg, Germany.
Roots of Trinomials from the Viewpoint of Amoeba Theory
Feb. 1, 2012 Research Seminar, Université de Genève, Switzerland.
Contemporary Key Problems in Amoeba Theory
July 5, 2011 AG & Oberseminar Diskrete Mathematik, Goethe University, Frankfurt/Main, Germany.
The Configuration Space of Amoebas with Barycentric Simplex Newton Polytope
Nov 27, 2010 Research Seminar, Courant Research Centre, Göttingen, Germany.
(Co)Amoebas: Different Aspects of Approximation, Boundary and Homotopy
Dec. 18, 2009 AG & Oberseminar Diskrete Mathematik, Goethe University, Frankfurt/Main, Germany.
Amoebas of Genus at Most One

Colloquium Talks

June 12, 2017 Colloquium, Universität Leipzig, Germany.
A New Approach to Nonnegativity and Polynomial Optimization
Dec. 14, 2016 Colloquium, University of Massachusetts at Amherst, Amherst, MA.
A New Approach to Nonnegativity and Polynomial Optimization
Oct. 5, 2016 Colloquium, Sam Houston State University, Huntsville, TX.
An Introduction to Amoeba Theory
Oct. 19, 2015 Postdoc Colloquium, Texas A&M University, College Station, TX.
Nonnegative Polynomials and Sums of Squares Supported on Circuits
Oct. 9, 2014 Postdoc Colloquium, Texas A&M University, College Station, TX.
Roots of Trinomials from the Viewpoint of Amoeba Theory

Outreach Talks

Feb 19-20, 2018 BMS-Days, Technische Universität Berlin, Germany.
TBA
May 7, 2016 Math Circle, Texas A&M University, College Station, TX.
Public Key Cryptography
Aug. 8, 2014 Uni Camp 2014, Saarland University, Saarbrücken, Germany.
Public Key Kryptoverfahren
Aug. 8, 2014 Uni Camp 2014, Saarland University, Saarbrücken, Germany.
Mathematik Studieren
Oct. 8, 2009 Math Circle, Goethe University, Frankfurt/Main, Germany.
Das Art Gallery Problem