Author pages are created from data sourced from our academic publisher partnerships and public sources.

Publications Influence

Optimality, computation, and interpretation of nonnegative matrix factorizations

- M. Chu, F. Diele, R. Plemmons, S. Ragni
- Mathematics
- 2004

The notion of low rank approximations arises from many important applications. When the low rank data are further required to comprise nonnegative values only, the approach by nonnegative matrix… Expand

164 6- PDF

Coupling between lumped and distributed models for blood flow problems

- A. Quarteroni, S. Ragni, A. Veneziani
- Mathematics
- 1 December 2001

Abstract.In this paper we propose a method for coupling distributed and lumped models for the blood circulation. Lumped parameter models, based on an analogy between the circulatory system and an… Expand

130 2

Steady-state invariance in high-order Runge-Kutta discretization of optimal growth models

- S. Ragni, F. Diele, C. Marangi
- Mathematics
- 1 July 2010

This work deals with infinite horizon optimal growth models and uses the results in the Mercenier and Michel (1994a) paper as a starting point. Mercenier and Michel (1994a) provide a one-stage… Expand

10 2

Splitting and composition methods for explicit time dependence in separable dynamical systems

- S. Blanes, F. Diele, C. Marangi, S. Ragni
- Computer Science, Mathematics
- J. Comput. Appl. Math.
- 1 December 2010

TLDR

31 1

Error Estimates for Polynomial Krylov Approximations to Matrix Functions

TLDR

23 1

On the semigroup of standard symplectic matrices and its applications

Abstract A matrix Z∈ R 2n×2n is said to be in the standard symplectic form if Z enjoys a block LU-decomposition in the sense of A 0 −H I Z= I G 0 A T , where A is nonsingular and both G and H are… Expand

11 1- PDF

Implicit - symplectic partitioned (IMSP) Runge-Kutta schemes for predator-prey dynamics

- F. Diele, C. Marangi, S. Ragni
- Mathematics
- 26 September 2012

In the study of the effects of habitat fragmentation on biodiversity the role of spatial processes reveals of great interest since both the variation of size of the domains as well as their… Expand

7 1

Rational Krylov methods in exponential integrators for European option pricing

- S. Ragni
- Mathematics, Computer Science
- Numer. Linear Algebra Appl.
- 1 August 2014

TLDR

8 1

Exponential Lawson integration for nearly Hamiltonian systems arising in optimal control

- F. Diele, C. Marangi, S. Ragni
- Mathematics, Computer Science
- Math. Comput. Simul.
- 2011

TLDR

9 1

Numerical Comparison between Different Lie-Group Methods for Solving Linear Oscillatory ODEs

- F. Diele, S. Ragni
- Computer Science, Mathematics
- International Conference on Computational Science
- 21 April 2002

TLDR

3 1

...

1

2

3

4

...