Delfim F. M. Torres
University of Aveiro
740 Papers
4.6K Citations
Delfim F. M. Torres is an academic researcher from University of Aveiro. The author has contributed to research in topics: Fractional calculus & Optimal control. The author has an hindex of 60, co-authored 701 publications. Previous affiliations of Delfim F. M. Torres include University of Münster & Polytechnic Institute of Viana do Castelo.
Chat about Author
Papers
•Journal Article
Necessary optimality conditions for fractional action-like problems with intrinsic and observer times
TL;DR: In this paper, higher-order Euler-Lagrange and DuBois-Reymond stationary conditions for fractional action-like variational problems were proved for optimal control problems.
9
The spread of a financial virus through Europe and beyond
Olena Kostylenko,Helena Sofia Rodrigues,Delfim F. M. Torres,Delfim F. M. Torres +3 more
- 21 Jan 2019
TL;DR: In this article, the importance of international relations between countries on the financial stability is analyzed and the contagion effect in the network is tested by implementing an epidemiological model, comprising a number of European countries and using bilateral data on foreign claims between them.
9
•Journal Article
Quadratures of Pontryagin extremals for optimal control problems
TL;DR: In this article, a method to compute effective first integrals by combining Noether's principle with the Kozlov-Kolesnikov integrability theorem is presented. But this method is not suitable for optimal control problems with control taking values on open sets.
RESEARCH ARTICLE The Legendre Condition of the Fractional Calculus of Variations
Matheus J. Lazo,Delfim F. M. Torres +1 more
- 01 Jan 2013
TL;DR: In this article, a Legendre second-order necessary optimality condition for weak extremizers of a variational functional that depends on fractional derivatives is derived for the case where the derivatives are of noninteger order.
9