Found 8 result(s)

### 21.03.2012 (Wednesday)

#### Aspectsofmoderngeometry:up-datingHilbert

Colloquium Sir Simon Donaldson (Imperial College)

 at: 16:00 ICroom Blackett, Lecture Theatre 1 abstract: In the first part of the talk I will discuss the meaning of "geometry" in contemporary mathematics and some general developments. In the second part I will focus on a few particular problems which I know more about, such as questions involving topology and geometric structures on manifolds. The talk will in part be built around an imaginary conversation with Hilbert.

### 08.06.2009 (Monday)

#### GaugetheoryonG2manifoldsandbundlesoverCalabi-Yaumodulispaces

String Theory & Geometry Seminar Simon Donaldson (Imperial College)

 at: 13:00 ICroom IMS seminar room abstract: In the first part of the talk I will review differential geometric background involving associative submanifolds of 7 manifolds with G2 holonomy and an analogue of the Yang Mills instanton equation for connections on bundles over such a manifold. Then I will describe joint work with Ed Segal in which, assuming these objects have suitable formal properties, we define holomorphic bundles over moduli spaces of Calabi-Yau 3-folds which can be viewed as the complexification of Floer theory. In the last part of the talk I will consider in more detail the problem of establishing the foundations required for the theory. This involves pertubations of the equations and the question of how to count solutions at infinity, which are pairs consisting of a connection and an associative submanifold. The counting problem leads to a nonlinear generalisation of the spectral flow for eigenvalues of Dirac operators.

### 08.04.2008 (Tuesday)

#### Kahler-EinsteinandRiccisolitonsontoricFanomanifolds

Regular Seminar Simon Donaldson (Imperial College)

 at: 15:00 ICroom IMS lecture theatre abstract: For details, please consult the webpage www.ma.ic.ac.uk (slash) (tilde) rpwt (slash) LMS.html

### 14.11.2005 (Monday)

#### NumericalCalabi-Yaumetricsandprojectivegeometry

String Theory & Geometry Seminar Simon Donaldson (Imperial College)

 at: 13:30 ICroom Ballroom, 58 Princes Gate abstract:

### 17.06.2005 (Friday)

#### Self-dualmetricswithKillingfieldsandcomplexgeometry

Topology & Geometry Seminar Simon Donaldson (IC)

 at: 13:30 ICroom H140 abstract:

### 06.06.2005 (Monday)

#### Fieldtheoriesandnumericalinvariantsingeometryandtopology

String Theory & Geometry Seminar Simon Donaldson (IC)

 at: 13:00 ICroom 503 Huxley abstract:

### 25.04.2005 (Monday)

#### CurvatureinGeometryandPhysics

Exceptional Seminar Simon Donaldson (IC)

 at: 18:00 ICroom Clore Lecture Theatre, Huxley Building abstract: INSTITUTE FOR MATHEMATICAL SCIENCES LAUNCH WEEK