# Search results for: Stefano Cipolla

Numerical Linear Algebra with Applications > 27 > 2 > n/a - n/a

*Z*‐eigenvectors of this type of tensors. However, unlike the matrix case, the method...

*A*, a matrix

*V*with

*r*orthonormal columns and an integer $$m \ge 1$$ m≥1 , $$mr \le n$$ mr≤n , it is possible to devise a matrix algebra $$\mathcal {L}$$ L such that, denoting by $$\mathcal {L}_A$$ LA the matrix closest to

*A*from $$\mathcal {L}$$ L in the Frobenius norm, one has $$\mathcal {L}^j_AV=A^jV$$ LAjV=AjV for $$j=0,\dots...

Numerical Linear Algebra with Applications > 26 > 2 > n/a - n/a

*A*, we introduce a class of matrices related to

*A*, which is obtained by suitably combining projections of its powers onto algebras of matrices simultaneously diagonalized by a unitary transform. After a detailed theoretical study of some spectral properties of the matrices of this class, which suggests their use as regularizing preconditioners, we prove...

Applied Numerical Mathematics > 2018 > 123 > C > 43-57