Ricardo Almeida & Dina Tavares 
The Variable-Order Fractional Calculus of Variations [PDF ebook] 

Ricardo Almeida received his Bachelor and Master degrees in Mathematics from University of Porto, Portugal, and

his Ph.D. degree in Mathematics from University of Aveiro, Portugal. He is currently an Assistant Professor in the

University of Aveiro. His research interests include fractional calculus, calculus of variations and optimal control

theory. Ricardo Almeida has written 4 books and more than 60 publications in international journals.

Dina Tavares obtained her Master and Ph D degrees in Mathematics from University of Aveiro. She is an Adjunct Professor at the School of Education and Social Sciences (ESECS) of Polytechnic Institute of Leiria (IPL), Portugal, since 2017. Her research interests include fractional calculus, calculus of variations

and mathematics education.

Delfim F.M. Torres is a Full Professor of Mathematics at the University of Aveiro since 2015 and Coordinator of the

Systems and Control Group of CIDMA since 2010. He obtained Ph D in Mathematics in 2002 and DSc (Habilitation)

in Mathematics in 2011. Professor Torres has been awarded in 2015, 2016 and 2017 with the title of ISI Highly Cited

Researcher. He has written more than 400 publications, including two books with Imperial College Press, in 2012

and 2015, and two books with Springer, in 2014 and 2015. He is the Director of the FCT Doctoral Program of

Excellence in Mathematics and Applications of Universities of Minho, Aveiro, Porto and UBI since 2013. Sixteen

Ph D students in mathematics (six of which woman) have successfully finished under his supervision.