most citedSecond-order elliptic equations with variably partially VMO coefficients

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math.OC2007★ 1 cited

On factorizations of smooth nonnegative matrix-values functions and on smooth functions with values in polyhedra

N. V. Krylov

We discuss the possibility to represent smooth nonnegative matrix-valued functions as finite linear combinations of fixed matrices with positive real-valued coefficients whose squa…