Triangle Seminars
Monday, 23 Jan 2006
Picard-Lefschetz theory for holomorphic one-forms and complex symplectic geometry
Dietmar Salamon
(ETH Zurich)
Finite groups with small automorphism group
Robert A. Wilson
(Queen Mary)
Abstract:
The abstract can be found at
http://www.city.ac.uk/sems/mathematics/seminars.html
The abstract can be found at
http://www.city.ac.uk/sems/mathematics/seminars.html
Posted by: CityU
Tuesday, 24 Jan 2006
Precision Dark Energy
Dragan Huterer
(Chicago)
Abstract:
Evidence for the existence of some form of dark energy – a smooth component that causes the accelerated expansion of the universe and contributes about 70 percent of the total energy density – is by now very solid. However, very little progress has been made in understanding its nature and the underlying physical mechanism. In this talk I describe the prospects of several promising methods to improve the measurements of dark energy properties within the next decade. In addition to type Ia supernovae, these include weak gravitational lensing, counts of clusters of galaxies, and cosmic microwave background anisotropies. I comment on specific upcoming surveys, and challenges in controlling the systematic errors so that these probes can achieve their full potential and help us understand the nature of dark energy.
Evidence for the existence of some form of dark energy – a smooth component that causes the accelerated expansion of the universe and contributes about 70 percent of the total energy density – is by now very solid. However, very little progress has been made in understanding its nature and the underlying physical mechanism. In this talk I describe the prospects of several promising methods to improve the measurements of dark energy properties within the next decade. In addition to type Ia supernovae, these include weak gravitational lensing, counts of clusters of galaxies, and cosmic microwave background anisotropies. I comment on specific upcoming surveys, and challenges in controlling the systematic errors so that these probes can achieve their full potential and help us understand the nature of dark energy.
Posted by: IC
Wednesday, 25 Jan 2006
Solving Strings on AdS-5 x S-5 in Truncated Sectors
📍 London
Gleb Arutyunov
(Utrecht)
Explicit Invariant Measures for Products of Random Matrices
Lech Wolowski
(Bristol)
Abstract:
We construct a new family of invariant measures for
products of random matrices with gamma-distributed entries.
The invariant measures generalize the well know family of
GIG laws studied in the context of random continued fractions by Letac and Seshadri. The associated Lyapunov exponents are computed explicitly and the result is applied to the Anderson model with gamma-distributed potential yielding an explicit estimate on the localization rate.
We construct a new family of invariant measures for
products of random matrices with gamma-distributed entries.
The invariant measures generalize the well know family of
GIG laws studied in the context of random continued fractions by Letac and Seshadri. The associated Lyapunov exponents are computed explicitly and the result is applied to the Anderson model with gamma-distributed potential yielding an explicit estimate on the localization rate.
Posted by: brunel
From Trees to Loops and Back
📍 London
Gabriele Travaglini
(QMW)