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SIAMAM
2000
78views more  SIAMAM 2000»
14 years 10 months ago
Spatial Noise Stabilizes Periodic Wave Patterns in Oscillatory Systems on Finite Domains
Invasions in oscillatory systems generate in their wake spatiotemporal oscillations, consisting of either periodic wavetrains or irregular oscillations that appear to be spatiotemp...
Alison L. Kay, Jonathan A. Sherratt
SIAMCOMP
2000
76views more  SIAMCOMP 2000»
14 years 10 months ago
On Interpolation and Automatization for Frege Systems
The interpolation method has been one of the main tools for proving lower bounds for propositional proof systems. Loosely speaking, if one can prove that a particular proof system ...
Maria Luisa Bonet, Toniann Pitassi, Ran Raz
JMMA
2002
90views more  JMMA 2002»
14 years 10 months ago
Implicit Convex Polygons
Convex polygons in the plane can be defined explicitly as an ordered list of vertices, or given implicitly, for example by a list of linear constraints. The latter representation h...
Francisco Gómez, Ferran Hurtado, Suneeta Ra...
JVCIR
2010
162views more  JVCIR 2010»
14 years 9 months ago
Tetrolet transform: A new adaptive Haar wavelet algorithm for sparse image representation
In order to get an efficient image representation we introduce a new adaptive Haar wavelet transform, called Tetrolet Transform. Tetrolets are Haar-type wavelets whose supports ar...
Jens Krommweh
MA
2010
Springer
104views Communications» more  MA 2010»
14 years 9 months ago
Representations of SO(3) and angular polyspectra
We characterize the angular polyspectra, of arbitrary order, associated with isotropic fields defined on the sphere S2 = (x, y, z) : x2 + y2 + z2 = 1 . Our techniques rely heavi...
D. Marinucci, G. Peccati