# Research in Geometry/Topology

Geometry and topology at Berkeley center around the study of manifolds, with the incorporation of methods from algebra and analysis.

The principal areas of research in geometry involve symplectic, Riemannian, and complex manifolds, with applications to and from combinatorics, classical and quantum physics, ordinary and partial differential equations, and representation theory.

Research in topology *per se* is currently concentrated to a large extent on the study of manifolds in low dimensions. Topics of interest include knot theory, 3- and 4-dimensional manifolds, and manifolds with other structures such as symplectic 4-manifolds, contact 3-manifolds, hyperbolic 3-manifolds. Research problems are often motivated by parts of theoretical physics, and are related to geometric group theory, topological quantum field theories, gauge theory and Seiberg-Witten theory, and higher dimensional topology.

A number of members of the Geometry/Topology group belong to the Research Training Group in Geometry and Topology, which runs activities and supports grad students and postdocs in its areas of interest.

## Courses

### Undergraduate upper division courses

The undergraduate courses, Math 140, 141, 142 are devoted to different topics in geometry and topology:

**Math 140.** Metric Differential Geometry

**Math 141.** Elementary Differential Topology

**Math 142.** Elementary Algebraic Topology

### Graduate courses

There is a 3 semester sequence of graduate courses in geometry, Math 240, 241, 242, two of which are taught each year.

**Math 240.** Riemannian Geometry

**Math 241.** Complex Geometry

**Math 242.** Symplectic Geometry

There is a 2 semester sequence in algebraic topology, 215A,B, taught
every year, and a one semester course Math 214 in the foundations of
differential topology.

**Math 214.** Differentiable Manifolds

**Math 215A.** Algebraic Topology

**Math 215B.** Algebraic Topology

Two or more topics courses are given yearly:

**Math 270.** Hot Topics

**Math 276.** Topics in Topology

**Math 277.** Topics in Differential Geometry

Recent topics include:

** Spring 2016**,

**Math 276.**Factorization Algebras (Teichner)

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*Spring 2016***Math 277.**Applied Holomorphic Curve Theory (Hutchings)

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*Fall 2015***Math 270.**Gauge Theory (Wehrheim)

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*Spring 2015***Math 276.**Gauge Field Theory (Teichner)

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*Spring 2015***Math 277.**Ricci Flow (Lott)

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*Spring 2014***Math 276.**Functorial Field Theories and Ring Spectra (Teichner)

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*Spring 2014***Math 276.**Regularization of Moduli Spaces (Wehrheim)

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*Fall 2013***Math 278.**Pseudoholomorphic Curves (Wehrheim)

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*Spring 2013***Math 277.**The Quantum Riemann-Roch-Hirzebruch Theorem (Givental)

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*Fall 2012***Math 277.**Contact Homology (Hutchings)

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*Spring 2012***Math 277.**Kaehler Geometry (Lott)

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*Spring 2011***Math 270.**The Blob Complex (Teichner)

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*Spring 2011***Math 276.**The Index Theorem (Teichner)

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*Fall 2010***Math 276.**Seiberg-Witten-Floer Theory (Hutchings)

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*Fall 2010***Math 277.**Optimal Transport (Lott)

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*Spring 2010***Math 270.**Perturbative Quantization (Teichner)

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*Spring 2010***Math 276.**Three-Manifold Topology (Agol)

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*Fall 2009***Math 277.**Mirror Symmetry (Auroux)

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*Fall 2009***Math 277.**Exterior Differential Systems (Bryant)

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*Fall 2009***Math 277.**Ricci Flow (Lott)

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*Spring 2009***Math 270.**Topological Field Theory (Teichner)

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*Fall 2008***Math 276.**Rational Homotopy Theory (Teleman)

## Seminars

The Topology seminar is held weekly throughout the year, normally
Wednesdays at 4pm. The speakers are normally visitors, but sometimes are
resident faculty or graduate students. Three times a year the Bay Area
Topology Seminar meets at Stanford (fall), Berkeley (winter) and Davis
(spring), with two lectures in the afternoon and dinner afterward.

There are various seminars related to symplectic geometry. On the first Monday of 7 months per year,
there is a meeting of the Northern California Symplectic Geometry Seminar
(Berkeley-Davis-Santa Cruz-Stanford), with two talks and a dinner, the
venue alternating between Berkeley and Stanford. In the first (October)
meeting of each academic year, one of the talks is the Andreas Floer
Memorial Lecture, given by a distinguished invited speaker.

The Differential Geometry seminar is held weekly throughout the year, normally
Mondays at 5.

## Senate Faculty

Name | Title | Research Interests |
---|---|---|

Mina Aganagic | Professor | String theory |

Ian Agol | Professor | Low-dimensional topology |

Denis Auroux | Professor | Symplectic topology and mirror symmetry |

Richard H. Bamler | Assistant Professor | Geometric analysis, differential geometry, topology |

Robert Bryant | Professor Emeritus | Nonlinear partial differential equations and differential geometry, exterior differential systems, algebraic geometry, and Finsler geometry |

Alexander Givental | Professor | Symplectic and contact geometry, Singularity theory, Mathematical physics |

Robin C. Hartshorne | Professor Emeritus | Algebraic geometry, History of geometry |

Morris W. Hirsch | Professor Emeritus | Dynamical systems, Neural networks |

Wu-Yi Hsiang | Professor Emeritus | Transformation groups, Differential geometry |

Michael Hutchings | Professor | Low Dimensional and Symplectic Topology and Geometry |

Robion Kirby | Professor Emeritus | Topology of manifolds |

John Lott | Professor | Differential geometry, geometric analysis |

David Nadler | Professor | Geometric representation theory, symplectic geometry |

Charles C. Pugh | Professor Emeritus | Dynamical systems, normal hyperbolicity |

Nicolai Reshetikhin | Professor | Mathematical physics, Low-dimensional topology, Representation theory |

Isadore M. Singer | Professor Emeritus | Geometry, Partial differential equations, Physics |

Song Sun | Associate Professor | Differential geometry |

Peter Teichner | Professor Emeritus | Geometric topology, 4-manifolds, elliptic cohomology |

Constantin Teleman | Professor | Lie groups, Algebraic geometry, Topology, Quantum field theory |

John B. Wagoner | Professor Emeritus | Differential topology, Algebraic K-theory, Dynamical systems |

Katrin Wehrheim | Associate Professor | Low-dimensional and symplectic topology |

Alan D. Weinstein | Professor Emeritus, Professor of the Graduate School | Symplectic geometry, Mathematical physics |

Joseph A. Wolf | Professor Emeritus, Professor of the Graduate School | Lie groups, Functional analysis, Riemannian geometry |

## Visiting Faculty

Name | Title | Research Interests |
---|---|---|

Huibin Chen | Visiting Scholar | Homogeneous geometry |

Joseph Maher | Visiting Scholar | Geometric topology, random walks on groups |

Alexandru Scorpan | Visiting Scholar | 4-manifolds, mathematical publishing |

Slobodan Simić | Visiting Professor | Dynamical systems, differential geometry |

## Postdocs

Name | Title | Research Interests |
---|---|---|

Carolyn R. Abbott | Morrey Visiting Assistant Professor | Geometric group theory, low-dimensional topology |

James Conway | Visiting Assistant Professor | Contact and symplectic geometry |

Ved Datar | Postdoc | Differential geometry, Kaehler-Einstein metrics, Kaehler-Ricci flow, Gromov-Hausdorff convergence |

Marina Iliopoulou | Morrey Visiting Assistant Professor | Harmonic analysis, geometric measure theory, incidence geometry |

Alban Jago | Postdoc | Mathematical physics, Deformation quantization, Representation theory, Symmetric spaces |

Khoa L Nguyen | Postdoc | Symplectic topology |

Michele Schiavina | SNSF Postdoc | Mathematical Physics, Field Theory, Quantum Information, Quantum Gravity |

Dmitry Tonkonog | Simons Visiting Assistant Professor | Symplectic geometry and topology |

Michael Viscardi | Postdoc | Geometric representation theory; mirror symmetry |

## Faculty with Related Research Interests

Name | Title | Research Interests |
---|---|---|

Mark D. Haiman | Professor | Algebra, combinatorics, and algebraic geometry |

Jenny Harrison | Professor | Functional analysis, Geometric measure theory, Calculus of variations, Mathematical physics |

Vaughan F. R. Jones | Professor Emeritus | Von Neumann algebras |

William M. Kahan | Professor Emeritus | Error analysis, Numerical computations, Computers, Convexity, Large matrices, Trajectory problems |

Arthur E. Ogus | Professor Emeritus | Algebraic geometry |

Marc A. Rieffel | Professor | Non-commutative harmonic analysis, Operator algebras, Quantum geometry |

James A. Sethian | Professor | Applied mathematics, Computational physics, Partial differential equations |

Vivek Shende | Assistant Professor | Geometry |

Hung-Hsi Wu | Professor Emeritus | Real and complex geometry |

## Graduate Students

Name | Dissertation Supervisor |
---|---|

Alexander Appleton | |

Nicolas Brody | |

Aaron Brookner | |

Catherine Cannizzo | Denis Auroux |

Julian Chaidez | |

Harrison Chen | David Nadler |

Yael Degany | Katrin Wehrheim |

Kevin Donoghue | Ian Agol |

Christopher Eur | |

Benjamin Filippenko | Katrin Wehrheim |

Benjamin Gammage | David Nadler |

Chris Gerig | Michael Hutchings |

Andrew Hanlon | Denis Auroux |

Jeff Hicks | Denis Auroux |

Christopher Kuo | |

Yi LAi | |

Daniel Lowengrub | |

Calvin McPhail-Snyder | |

Kyle Miller | Ian Agol |

Mihai Munteanu | |

Christopher Policastro | Katrin Wehrheim |

Yingdi Qin | |

Eugene Rabinovich | |

Ritvik Ramkumar | David Eisenbud |

Wolfgang Schmaltz | Katrin Wehrheim |

Michael Smith | |

German Stefanich | David Nadler |

Tao Su | Vivek Shende, Richard E.Borcherds |

Thunwa 'Nics' Theerakarn | John Lott |

Ryan George Thorngren | Vivek Shende |

Franco Vargas Pallete | Ian Agol |

Morgan Weiler | Michael Hutchings |

Patrick Wilson | John Lott |

Ben Wormleighton | David Nadler |

Xiaohan Yan | |

Qiaochu Yuan | David Nadler |

Zhengyi Zhou | Katrin Wehrheim |

## Recent Ph.D.s

Name | Dissertation Title | Dissertation Supervisor | Year |
---|---|---|---|

Kuan-Ying Fang | Geometric Constructions of Mapping Cones in the Fukaya Category | Denis Auroux | 2017 |

Alvin Kerber | Quasi-Fuchsian surface subgroups of infinite covolume Kleinian groups | Ian Agol | 2017 |

Qiao Zhou (Elaine) | Applications of Toric Geometry to Geometric Representation Theory | David Nadler | 2017 |

Chang-Yeon Cho | Topological types of Algebraic stacks | 2016 | |

Aaron Mazel-Gee | Goerss--Hopkins obstruction theory via model ?-categories | Peter Teichner | 2016 |

Benjamin B. McMillan | Geometry and Conservation Laws for a Class of Second-Order Parabolic Equations | Robert Bryant | 2016 |

Christian Hilaire | John Lott | 2015 | |

Xin Jin | David Nadler | 2015 | |

Heather Lee | Denis Auroux | 2015 | |

Eric C. Peterson | Constantin Teleman | 2015 | |

Zachary Aaron Sylvan | Denis Auroux | 2015 | |

Sebastian Hurtado | Homomorphisms between groups of diffeomorphisms | Ian Agol | 2014 |

Pablo Solis | Antimicrobial Applications of Ambient-Air Plasmas | Constantin Teleman | 2014 |

Renato Vianna | On Exotic Lagrangian Tori in CP2 | Denis Auroux | 2014 |

Nathaniel Watson | Peter Teichner | 2014 | |

Dario Beraldo | Loop Group Actions on Categories and Whitaker Invariants | Constantin Teleman | 2013 |

Daniel Berwick Evans | Supersymmetric sigma models, partition functions, and the Chern-Gauss-Bonnet Theorem | Peter Teichner | 2013 |

Keon Choi | The embedded contact homology of toric contact manifolds | Michael Hutchings | 2013 |

Daniel Cristofaro-Gardiner | Some Results Involving Embedded Contact Homology | Michael Hutchings | 2013 |

Vinicius Gripp Barros Ramos | The Asymptotics of ECH Capacities and Absolute Gradings on Floer Homologies | Michael Hutchings | 2013 |

Daniel Halpern-Leistner | Geometric Invariant Theory and Derived Categories of Coherent Sheaves | Constantin Teleman | 2013 |

Shawn McDougal | Representing Sato-Levine Invariants by Whitney Tower Intersections | Peter Teichner | 2013 |

George W. Melvin | Constantin Teleman |