1 citations · 1 across the 4 of their papers we have counts for
4 papers
A variation of Broyden Class methods using Householder adaptive transforms
S. Cipolla, C. Di Fiore, P. Zellini
In this work we introduce and study novel Quasi Newton minimization methods based on a Hessian approximation Broyden Class-\textit{type} updating scheme, where a suitable matrix $\…
Bernoulli, Ramanujan, Toeplitz and the triangular matrices
C. Di Fiore, F. Tudisco, P. Zellini
By using one of the definitions of the Bernoulli numbers, we prove that they solve particular odd and even lower triangular Toeplitz (l.t.T.) systems of equations. In a paper Raman…
On complex power nonnegative matrices
F. Tudisco, V. Cardinali, C. Di Fiore
Power nonnegative matrices are defined as complex matrices having at least one nonnegative integer power. We exploit the possibility of deriving a Perron Frobenius-like theory for…
Optimal rank matrix algebras preconditioners
F. Tudisco, C. Di Fiore, E. E. Tyrtyshnikov
When a linear system Ax = y is solved by means of iterative methods (mainly CG and GMRES) and the convergence rate is slow, one may consider a preconditioner P. The use of such pre…