KisSem: Keep it simple Seminar
This weekly seminar is intended for PhD Students and Postdocs to informally discuss topics in the field of Geometry and Mathematical Physics.
 Next Occurrence: 19.07.2019, 12:00  13:00
 Jan Techter: Elementary divisors and the classification of pencils of quadrics
 Type: Seminar
 Location: TU Berlin, MA875 HCafe
Contact: Jan Techter / Thilo Rörig
Room: MA875 (HCafe)
Time: Tuesdays at 14:00, and Fridays at 12:00
Talks
02.08.2019

12:00  13:00
The Multivariable Alexander Polynomial for Periodic Links,
Max Krause
19.07.2019

12:00  13:00
Elementary divisors and the classification of pencils of quadrics,
Jan Techter
05.07.2019

12:00  13:00
On asymptotic, characteristic, circular and curvature lines on quadrics,
Jan Techter
21.06.2019

12:00  13:00
Carnot's Theorem and Quadrics,
Alexander Fairley
+
14.06.2019

12:00  13:00
On Bubble Rings and Ink Chandeliers,
Marcel Padilla
+
11.06.2019

14:00  15:00
Existence of piecewise linear metrics with constant discrete Gaussian curvature, part 2,
Hana Kourimska
07.06.2019

12:00  13:00
Discretization via loop groups and Discrete mean curvature coordinates,
Alexander Preis
03.06.2019

12:00  13:00
Existence of piecewise linear metrics with constant discrete Gaussian curvature, part 1,
Hana Kourimska
17.05.2019

12:00  13:00
The Loewner energy of curves and loops,
Yizheng Yuan
+
10.05.2019

12:00  13:00
Stretch deformations of complete finite area hyperbolic surfaces,
Lara Skuppin
16.04.2019

14:00  15:00
Babich Bobenko tori and why they can not be embedded, part 2,
Jonas Tervooren
12.04.2019

12:00  13:00
Babich Bobenko tori and why they can not be embedded,
Jonas Tervooren
+
01.03.2019

12:00  13:00
Discrete Uniformization for surfaces of hyperbolic type with boundary,
Isabella Retter
22.02.2019

12:00  13:00
Discrete integrable systems and Mobius geometry,
Niklas Affolter
01.02.2019

12:00  13:00
Computational problems from a geometric perspective,
Albert Chern
18.01.2019

12:00  13:00
Riemannian approach to Teichmüller theory,
Christoph Seidel
07.12.2018

12:00  13:00
Periodic knot theory and colored link invariants,
Max Krause
+
04.12.2018

14:00  15:00
On the projective geometry of inscribed conics,
Alexander Fairley
30.11.2018

12:00  13:00
Simulating Hurricanes on Bunnies, Point Vortex Dynamics on Closed Surfaces,
Marcel Padilla
+
16.11.2018

12:00  13:00
Laguerre Geometry in Space Forms,
Carl Lutz
09.11.2018

12:00  13:00
Contact Hamiltonian dynamics,
Mats Vermeeren
+
02.11.2018

12:00  13:00
Curved Folding,
Leonardo Alese (TU Graz)
26.10.2018

12:00  13:00
The evolution of random simplicial complexes,
Andrew Newman
+
20.07.2018

12:00  13:00
Moduli spaces of Feynman diagrams,
Marko Berghoff (HU Berlin)
19.07.2018

12:00  13:00
Feynman diagrams,
Ananth Sridhar
17.07.2018

13:30  14:00
Introduction to the talk "Polytopal surfaces in Fuchsian manifolds",
Roman Prosanov
13.07.2018

12:00  13:00
Gauge Theory,
Ananth Sridhar
10.07.2018

14:00  15:00
Connections on principle bundles,
Hanka Kourimska
06.07.2018

12:00  13:00
Principle Bundles,
Alxander Preis
26.06.2018

13:30  14:00
Introduction to the talk "Constraintbased Point Set Denoising" ,
Martin Skrodzki
22.06.2018

12:00  13:00
Inversions in Lie geometry,
Thilo Rörig
19.06.2018

14:00  15:00
The Fundamental theorem of (nonabelian) calculus,
Alexander Preis
08.06.2018

12:00  13:00
FockGoncharov coordinates on the module space of framed convex projective structures of a surface,
Robert Löwe
01.06.2018

12:00  13:00
Schwarzian derivative,
Ulrike Bücking
11.05.2018

12:30  13:30
Discrete Bonnet Pairs,
Andrew SagemanFurnas
27.04.2018

12:00  13:00
Quadratic differentials, part 2,
Jonas Tervooren
20.04.2018

12:00  13:00
Quadratic differentials, part 1,
Jonas Tervooren
13.04.2018

12:00  13:00
Laguerre geometry and the checkerboard incircle incidence theorem,
Jan Techter
03.04.2018

14:00  15:00
Immersions, regular homotopies, rimmed surfaces and spin structures of surfaces,
Albert Chern
27.03.2018

14:00  15:00
Hirota's bilinear method,
Mats Vermeeren
23.03.2018

14:00  15:00
Parallelogram maps,
Ananth Sridhar
16.03.2018

13:00  14:00
Introduction to Teichmüller Theory,
Lara Skuppin
27.02.2018

14:00  15:00
Variational principles for discrete conformal maps and Ronkin's functions,
Ulrike Bücking
02.02.2018

11:00  12:00
cotan weights,
Niklas Affolter
26.01.2018

13:00  14:00
Comparing polyhedral surfaces  a metric defined via cotan weights and edge flips,
Isabella Retter
23.01.2018

13:30  14:00
Introduction to the talk "EulerArnold theory for SPDEs",
Alexander Schmeding
19.01.2018

13:00  14:00
A parametrized surface theory for nonplanar quad meshes in $\mathbb{R}^3$,
Andrew SagemanFurnas
16.01.2018

13:30  14:00
Introduction to the talk "Quanta of Discrete Spacetime",
Alex Goeßmann
12.01.2018

12:00  13:00
The startriangle move on integrable circle patterns,
Niklas Affolter
08.12.2017

12:15  13:15
Antide Sitter space, smooth CMC surfaces in AdS,
Alexander Preis
01.12.2017

12:00  13:00
Loop group description of CMC surfaces in the Antide Sitter space,
Alexander Preis
24.11.2017

11:30  12:30
Projective varieties,
Marta Panizzut
17.11.2017

12:00  13:00
Fluid dynamics and prequantum bundle, part 3,
Albert Chern
14.11.2017

14:00  15:00
Fluid dynamics and prequantum bundle, part 2,
Albert Chern
10.11.2017

12:00  13:00
Fluid dynamics and prequantum bundle, part 1,
Albert Chern
07.11.2017

14:00  15:00
Characterising symmetric tetrahedra,
Hana Kourimska
03.11.2017

12:00  13:00
Toric Geometry,
Lars Kastner
24.10.2017

12:00  13:00
The sphere as a ruled surface,
Jan Techter
20.10.2017

11:15  12:15
Isothermic channel surfaces,
Jonas Tervooren
17.10.2017

14:00  15:00
Embedding the real projective space into the complex projective space,
Jan Techter
08.09.2017

14:00  15:00
Discrete confocal quadrics: general parametrizations,
Jan Techter
+
28.07.2017

14:00  15:00
Pleating the hyperbolic plane,
Lara Skuppin
+
25.07.2017

14:00  15:00
Secondary Fans and Secondary Polyhedra of Punctured Riemann Surfaces,
Robert Loewe
04.07.2017

14:00  15:00
Ricci flow,
Hanka Kourimska
16.06.2017

14:00  15:00
Hyperbolic geodesics and tractrix metric,
Niklas Affolter
13.06.2017

14:00  15:00
PluriLagrangian systems  discrete and smooth,
Mats Vermeeren
25.04.2017

14:00  15:00
On conformally equivalent triangle lattices,
Ulrike Bücking
07.04.2017

14:00  15:00
Phenomena of spin transformations with prescribed binormal,
Christoph Seidel
04.04.2017

14:00  15:00
A variational principle for isoradial graphs,
Niklas Affolter
+
31.03.2017

14:00  15:00
Some aspects of integrability in the Six Vertex model,
Ananth Sridhar
+
28.03.2017

14:00  15:00
Projective differential geometry,
Thilo Roerig
+
17.03.2017

14:00  15:00
PluriLagrangian systems and KdV hierarchy,
Mats Vermeeren
+
14.03.2017

14:00  15:00
Knots, minimal surfaces, mapping class groups,
Benedikt Kolben
+
10.03.2017

14:00  15:00
Lagrange multipliers of a maximum entropy distribution,
Niklas Affolter
+
07.03.2017

14:00  15:00
Plausible inference and the maximum entropy principle, part2,
Jan Techter
03.03.2017

13:00  14:00
Plausible inference and the maximum entropy principle,
Jan Techter
+
30.11.2016

14:30  15:30
Smooth polyhedral surfaces,
Felix Günther
27.07.2016

15:15  15:45
Crystalline structures from hyperbolic tilings,
Benedikt Kolben
+ 
16:00  16:30
Ricci Flow III: On the topological condition for existence of a circle packing metric with constant Gaussian curvature,
Hana Kourimska
+ 
16:45  17:15
Conjugate Silhouette nets,
Thilo Roerig
+
22.06.2016

14:30  15:30
Infinitesimal deformations of discrete surfaces,
WaiYeung Lam
01.06.2016

14:15  15:15
Ricci flow, part 2,
Hana Kourimska
+
25.05.2016

14:00  15:00
Envelope and orthogonal trajectories of a family of circles,
Jan Techter
+
04.05.2016

14:00  15:00
Projective model of Möbius geometry,
Thilo Roerig
22.04.2016

12:00  13:00
Variational Methods for Discrete Surface Parameterization. Applications and Implementation.,
Stefan Sechelmann
20.04.2016

13:00  14:00
Ricci flow, part 1,
Hana Kourimska
+
15.04.2016

12:00  13:00
SuperNets,
Thilo Roerig
30.03.2016

13:00  14:00
Teichmüller maps, part 2,
Lara Skuppin
23.03.2016

13:00  14:00
Teichmüller maps, part 1,
Lara Skuppin
+
16.03.2016

13:00  14:00
The dimer model,
Niklas Affolter
+
11.03.2016

12:00  13:00
Discrete Confocal Quadrics as orthogonal Koenigs nets,
Jan Techter
+
09.03.2016

13:00  14:00
Rigidity theory,
WaiYeung Lam
+
02.03.2016

13:00  14:00
Minimal surfaces from discrete harmonic functions,
WaiYeung Lam
+
04.12.2015

11:00  12:00
On a discretization of confocal quadrics, part 2,
Jan Techter
+
27.11.2015

11:00  12:00
On a discretization of confocal quadrics, part 1,
Jan Techter
+
26.06.2015

11:00  12:00
Zerosum problems in abelian groups,
Florian Frick
12.06.2015

11:00  12:00
On connections between electric networks, discrete harmonic functions, extremal length and random walks III,
Ulrike Bücking
05.06.2015

11:00  12:00
On connections between electric networks, discrete harmonic functions, extremal length and random walks II,
Ulrike Bücking
29.05.2015

11:00  12:00
On connections between electric networks, discrete harmonic functions, extremal length and random walks,
Ulrike Bücking
27.02.2015

11:00  12:00
Inscribed cyclic polygons,
Hanna Kourimska und Lara Skuppin
20.02.2015

11:00  12:00
Poncelet's Porism,
Ulrike Bücking
23.01.2015

11:00  12:00
Euclidean plane geometry via geometric algebra,
Charles Gunn
16.01.2015

11:00  12:00
Lexell's Theorem in the hyperbolic plane,
Christoph Seidel
05.11.2014

10:15  11:15
Nets with unique nodes and spherical geometry,
Thilo Rörig
29.10.2014

09:45  11:00
Discrete line congruences on triangulated surfaces,
Jan Techter
22.10.2014

10:15  11:15
Isothermic triangulated surfaces,
Wayne Lam
15.10.2014

10:15  11:15
Nerve complexes of arcs in $\mathbb{S}^1$,
Florian Frick
18.06.2014

16:15  17:15
Constrained Willmore Minimizers  Theory and Experiments,
Lynn Heller (Uni Tuebingen)
28.05.2014

16:15  17:15
Geometric invariant theory of the space  a modern approach to solid geometry (with a much simpler proof of the Kepler's conjecture as an exemplary application),
WuYi Hsiang (UC Berkeley/Hong Kong University)
02.04.2014

14:00  15:00
Zyklidische und hyperbolische Netze,
Emanuel HuhnenVenedey
+
26.03.2014

14:00  15:00
Zyklidische und hyperbolische Netze,
Emanuel HuhnenVenedey
+
19.03.2014

14:00  15:00
Thickening Dubins Paths,
Thomas El Khatib
26.02.2014

14:00  15:00
Tverberg's Theorem strikes back,
Florian Frick
31.01.2014

12:00  13:00
Quasiconformal distortion,
Lara Skuppin
17.01.2014

12:00  13:00
Generalized isoradial circle patterns,
Jan Techter
06.12.2013

10:15  12:00
Elastic curves and knots,
Thomas El Khatib
22.11.2013

10:15  12:00
Splitting Separatrices in Dynamical Systems,
Marina Gonchenko
15.11.2013

10:15  12:00
Hyperbolic Delaunay Triangulations,
Thilo Rörig
08.11.2013

10:15  12:00
Teichmüller spaces,
Lara Skuppin
01.11.2013

10:15  12:00
Teichmüller spaces,
Lara Skuppin
25.10.2013

10:15  12:00
Statistical Mechanics,
Andrew Kels
18.10.2013

10:15  12:00
Subdivision of Koenigs nets,
Stefan Sechelmann
21.06.2013

10:15  12:00
Troyanov Theorem on Riemann surfaces and polyhedral metrics,
Micheal Joos
14.06.2013

10:15  12:00
Canonical immersions of complex tori,
Andre Heydt
31.05.2013

10:15  12:00
From Maxwell's equations to Hamiltonian Flows on Phase Space,
Christian Lessig
24.05.2013

10:15  12:00
Triangulations with valence bounds,
Florian Frick
17.05.2013

10:15  12:00
Theorem on circles and lines  old and new,
Arseniy Akopyan
03.05.2013

10:15  12:00
Symmetries on Riemann surfaces,
Isabella Thiessen
26.04.2013

10:15  12:00
Darboux transforms of plane curves,
Thilo Rörig
19.04.2013

10:00  12:00
Direction fields,
Felix Knöppel
12.04.2013

10:00  12:00
Nets on surfaces,
Thilo Rörig
15.03.2013

10:00  12:00
Axis of motions in different geometries/ Discussion: Hopf fibration,
Charles Gunn
08.03.2013

10:00  12:00
Smooth vector fields on discrete surfaces,
Felix Knöppel
01.03.2013

10:00  12:00
Axes of motions via geometric algebra in different metrics,
Charles Gunn
22.02.2013

10:00  12:00
Axes of hyperbolic motions,
Thilo Rörig
15.02.2013

10:00  12:00
From Hyperboloid to Poincare model via Klein model,
Thilo Rörig
08.02.2013

10:00  12:00
A game on graphs,
Felix Günther
01.02.2013

10:00  12:00
Curvature line and asymptotic line parametrizations in Lie and Pluecker Geometry,
Emanuel HuhnenVenedey
18.01.2013

10:00  12:00
Homology theories,
Stefan Born
07.12.2012

10:00  12:00
,
Nikolay Dimitrov
30.11.2012

10:00  12:00
3D and 4Dconsistency, quad equations, Bäcklund transformations and consistency, Bianchi permutability,
Raphael Boll
23.11.2012

10:00  12:00
Discrete and smooth KdVequations, Bäcklund transformations, quad equations, 3Dconsistency,
Raphael Boll
16.11.2012

10:00  12:00
Cosinelaw for spherical triangles and dynamical systems,
Matteo Petrera
09.11.2012

10:00  12:00
Schläfli principle,
David Chubelaschwili