Results 201 to 210 of about 1,576 (215)

Reflection groups and cones of sums of squares

Journal of Symbolic Computation, 2023
Cordian Riener
exaly  

Potential estimate for the obstacle problem relative to the sum of squares of vector fields

1991
The paper deals with variational inequalities associated to equations of the type \[ -Lu=f,\qquad f\in L^ \infty(\Omega), \] where \(L\) is a sum of squares of vector fields satisfying a uniform Hörmander condition. The obstacle condition is \(u\geq \psi\). The main result of the paper is a potential type estimate for local solutions, which leads to an
openaire   +1 more source

Gevrey Hypo-ellipticity for Sums of Squares of Vector Fields: some examples

2005
The Gevrey hypo-ellipticity of a couple of model operators is studied in detail. We match the obtained Gevrey regularity against the structure of the Poisson-Treves stratification of the operators.
openaire   +1 more source

Analytic and Gevrey hypoellipticity for perturbed sums of squares operators

Annali Di Matematica Pura Ed Applicata, 2017
Antonio Bove, Gregorio Chinni, Bove Antonio   +2 more
exaly  

Local theory for sums of squares of vector fields

1993
openaire   +1 more source

Sums of the squares of terms of sequence {u n }

Proceedings of the Indian Academy of Sciences: Mathematical Sciences, 2008
Emrah Kilic
exaly  

Sparsity in sums of squares of polynomials

Mathematical Programming, 2004
Masakazu Kojima, Hayato Waki, Kojima Masakazu   +2 more
exaly  

Nonnegative functions as squares or sums of squares

Journal of Functional Analysis, 2006
Fabrizio Broglia, Ferruccio Colombini
exaly  

Using sums-of-squares to prove Gaussian product inequalities

Dependence Modeling
Oliver Russell
exaly  

Analytic and Gevrey regularity for certain sums of two squares in two variables

Tohoku Mathematical Journal
Antonio Bove
exaly