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This implies that a system is algebraically integrable (i.e., its eigenvalue problem is explicitly solvable in quadratures) if and only if the differential Galois group is commutative for generic eigenvalues.
      
We apply this criterion of algebraic integrability to two examples: finite-zone potentials and the elliptic Calogero-Moser system.
      
In the second example, we obtain a proof of the Chalyh-Veselov conjecture that the Calogero-Moser system with integer parameter is algebraically integrable, using the results of Felder and Varchenko.
      
The least upper bound for the degrees of elements in a system of generators turns out to be independent of the number of vector variables.
      
We consider 3-parametric polynomialsPμ*(x; q, t, s) which replace theAn-series interpolation Macdonald polynomialsPμ*(x; q, t) for theBCn-type root system.
      
Fourier transforms related to a root system of rank 1
      
Explicit bounds on the number of type V variables in a complete system of typical separating invariants are given for the binary polyhedral groups, and this is applied to the invariant theory of binary
      
A generating system for the algebra of semi-invariants of mixed representations of a quiver is determined.
      
We give a coordinate system on each stratum, and show that all strata are coisotropic subvarieties.
      
The Balian-Low theorem (BLT) is a key result in time-frequency analysis, originally stated by Balian and, independently, by Low, as: If a Gabor system $\{e^{2\pi imbt} \, g(t-na)\}_{m,n \in \mbox{\bf Z}}$
      
Associated to a given D is a setT (A, D), which is the attractor of an affine iterated function system, satisfyingT=∪d∈D(T+d).
      
The method we use is a combination of the smoothing effect of the operator ?t + ?x(2j+1) and a gauge transformation performed on a linear system, which allows us to consider initial data with arbitrary size.
      
The fiberization of affine systems via dual Gramian techniques, which was developed in previous papers of the authors, is applied here for the study of affine frames that have an affine dual system.
      
Therefore, it should be an important step in developing a system for automated perspective-independent object recognition.
      
In this article we investigate the asymptotic behavior of and using the dynamical system techniques: the pressure function and the variational principle.
      
Existence of local smooth solution for a generalized Zakharov system
      
If the sequence of functions ?j, k is a wavelet frame (Riesz basis) or Gabor frame (Riesz basis), we obtain its perturbation system ψj,k which is still a frame (Riesz basis) under very mild conditions.
      
A shift-invariant system is a collection of functions {gm,n} of the form gm,n(k)=gm(k-an).
      
A principal problem is to find a dual system γm,n(k)=γm(k-an) such that each functionf can be written asf= ∑?f, γm,n?gm,n.
      
We extend to general finite groups a well-known relation used for checking the orthogonality of a system of vectors as well as for orthogonalizing a nonorthogonal one.
      
 

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