Calculus of Variations, Optimal Control, and Mathematical Biology: A Themed Issue Dedicated to Professor Delfim F. M. Torres on the Occasion of His 50th Birthday

Dear Colleagues,

This Special Issue of Axioms is dedicated to Professor Delfim F. M. Torres on the occasion of his 50th birthday, as recognition of his significant contribution in the field. Professor Torres is a Distinguished University Professor, a Highly Cited Researcher in Mathematics (2015, 2016, 2017 and 2019), and Lifetime Member of The American Mathematical Society. He is one of the founders of fractional variational analysis and fractional optimal control, and has made tremendous contributions to the theory of variational analysis with applications to many other fields such as optimization, optimal control, time-scale analysis, and mathematical epidemiology and biology. Professor Delfim F. M. Torres is the recipient of several international awards, including the 325 Years of Fractional Calculus Award, in Testimony of the High Regard for His Achievements in the Area of Fractional Calculus and Its Applications, is included in the World's Top 2% Scientists 2020 by Stanford University, both as a Career-long Highly Cited Researcher and as a single calendar year Highly Cited Researcher, was considered by Thomson Reuters as one of the World's Most Influential Scientific Minds, won a Publons Peer Review Award as a world's top peer reviewer, was recognized in the top 1% of reviewers, a Sentinel of Science Award, and so on. Many of his research works have been considered top papers in the area, served as research highlights, and been awarded prizes. Besides being a great scholar, he is also a great teacher who has already educated twenty Ph.D. students from all over the world. 

This Special Issue covers many of Professor Torres' research interests, which include several areas of pure and applied mathematical sciences, such as approximations and expansions, biology and other natural sciences, calculus of variations and optimal control, optimization, difference and functional equations, fluid mechanics, functional analysis, game theory, economics, social and behavioral sciences, general measure and integration, mechanics of deformable solids, number theory, numerical analysis, operations research, mathematical programming, ordinary differential equations, partial differential equations, quantum theory, real functions, systems and control theory, fractional calculus and its applications, integral equations and transforms, higher transcendental functions and their applications, q-series and q-polynomials, inventory modeling and optimization, dynamic equations on time scales, and mathematical modeling. 

Short Biography 

Delfim Fernando Marado Torres was born 16 August 1971 in Nampula, Mozambique. He is, since March 2015, a Full Professor of Mathematics at University of Aveiro (UA), Director of the R&D Unit CIDMA, the largest Portuguese research center in Mathematics, and Coordinator of its Systems and Control Group. He obtained a PhD in Mathematics from UA in 2002, and Habilitation in Mathematics, UA, in 2011. His main research area is calculus of variations and optimal control; optimization; fractional derivatives and integrals; dynamic equations on time scales; and mathematical biology. Torres has written outstanding scientific and pedagogical publications. In particular, he has co-authored two books with Imperial College Press and three books with Springer. He has strong experience in graduate and post-graduate student supervision and teaching in mathematics. Moreover, he has been team leader and member in several national and international R&D projects, including EU projects and networks. He is, since 2013, the Director of the Doctoral Programme Consortium in Mathematics and Applications (MAP-PDMA) of Universities of Minho, Aveiro, and Porto. Prof. Torres is married since 2003, and has one daughter and two sons.

Prof. Dr. Natália Martins
Prof. Dr. Ricardo Almeida
Dr. Cristiana João Soares da Silva
Prof. Dr. Moulay Rchid Sidi Ammi
Guest Editors

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