Roberto Garrappa (@RGarrappa) profile picture

Roberto Garrappa

@RGarrappa

Professor of Numerical Analysis at the University of Bari (Italy) @unibait

 Monopoli - Italy
dm.uniba.it/members/garrappa/roberto-garrappa
Joined April 2013
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Photo by Roberto Garrappa (@RGarrappa)Photo by Roberto Garrappa (@RGarrappa)Photo by Roberto Garrappa (@RGarrappa)Photo by Roberto Garrappa (@RGarrappa)Photo by Roberto Garrappa (@RGarrappa)Photo by Roberto Garrappa (@RGarrappa)Photo by Roberto Garrappa (@RGarrappa)Photo by Roberto Garrappa (@RGarrappa)Photo by Roberto Garrappa (@RGarrappa)Photo by Roberto Garrappa (@RGarrappa)
A fractional-order transport model in a heterogeneous porous medium derived from a micro-macroscale framework royalsocietypublishing.org/r…
From microstructure to memory: Basset-type fractional transport models in porous media

From microstructure to memory: Basset-type fractional transport models in porous media

Abstract. Fractional time-derivative operators have been increasingly used to model anomalous advection–diffusion–reaction phenomena in porous media, where

royalsocietypublishing.org
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A detailed analysis of derivatives of the Mittag–Leffler function and their applications: doi.org/10.1007/s11071-025-1… #MATLAB code available mathworks.com/matlabcentral/…
Derivatives of Mittag-Leffler functions: theory, computation and applications

Derivatives of Mittag-Leffler functions: theory, computation and applications

Nonlinear Dynamics - Properties of Mittag-Leffler (ML) functions, and their fundamental role in fractional calculus, are well known. In contrast, derivatives of these functions, along with their...

link.springer.com
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10 September 1930 | An Italian Jewish woman, Liliana Segre, was born in Milan. In January 1944 she was deported to #Auschwitz with her father Alberto who perished in the camp in April 1944. Liliana survived. Today she is a Senator for life in #Italy and turns 93.
Image from Auschwitz Memorial (@AuschwitzMuseum)
Image from Auschwitz Memorial (@AuschwitzMuseum)
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Happy to receive the Riemann-Liouville award for the best FDA paper in theory at "International Conference on Fractional Differentiation and Applications" in Ajman (UAE) ajman.ac.ae/en/icfda2022 #ICFDA22 #ICFDA23 #fractional
Image from Roberto Garrappa (@RGarrappa)
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Roberto Garrappa retweeted
marcoberardi (@marcoberardi14) profile picture
marcoberardi@marcoberardi1424 Mar 2023
Great to organize INTRUSION2023 with @mat_icardi, M. Putti, @FabioDifonzo, @wm_boon, @RGarrappa and @nicolettadelbu1! Confirmed speakers, among the others, F. Radu (@PmgBergen), R. Tempone (@RWTH and #KAUST), M. Ferronato (@UniPadova). Don’t miss it! intrusion2023.irsa.cnr.it
CNR IRSA (@cnr_irsa) profile pictureCNR IRSA@cnr_irsa21 Mar 2023
IRSA involved in INTRUSION 2023 (numerIcal aNalysis, porous media and waTer ResoUrceS: a fruItful cOntamiNation). July 3-5 2023 Bari, Italy: don't miss! Confirmed speakers, among the others, A. Porporato(@Princeton) M. Riva(@MiPORE_dica) S. Pop (@uhasselt) intrusion2023.irsa.cnr.it
Image from CNR IRSA (@cnr_irsa)
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Using derivatives of the Mittag-Leffler function to describe impulse responses of fractional-order systems with multiple complex poles. Just published on FCAA a @SpringerNature journal. @FractalCOST link.springer.com/article/10…
Impulse response of commensurate fractional-order systems: multiple complex poles

Impulse response of commensurate fractional-order systems: multiple complex poles

Fractional Calculus and Applied Analysis - The impulse response of a fractional-order system with the transfer function $$s^{\delta }/{[(s^{\alpha }-a)^2+b^2]^n}$$ , where $$n \in \mathbb {N}$$ ,...

link.springer.com
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The work "On the fractional Laplacian of variable order" is now available in open access link.springer.com/article/10…
On the fractional Laplacian of variable order

On the fractional Laplacian of variable order

Fractional Calculus and Applied Analysis - We present a novel definition of variable-order fractional Laplacian on $${\mathbb {R}}^n$$ based on a natural generalization of the standard Riesz...

link.springer.com
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Optimal integer and fractional-order modeling of electro-injectors in compression-ignition engines, a @FractalCOST outcome in @COSTprogramme with @Sverre_Holm sciencedirect.com/science/ar…
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Variable-order fractional calculus: A change of perspective sciencedirect.com/science/ar… a work of interest for @FractalCOST
"Stability of Systems of Fractional-Order Differential Equations with Caputo Derivatives" a new paper in @MathematicsMDPI. A @FractalCOST work in @COSTprogramme Available at mdpi.com/2227-7390/9/8/914
Stability of Systems of Fractional-Order Differential Equations with Caputo Derivatives

Stability of Systems of Fractional-Order Differential Equations with Caputo Derivatives

Systems of fractional-order differential equations present stability properties which differ in a substantial way from those of systems of integer order. In this paper, a detailed analysis of the...

mdpi.com
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Excellent work!
Bishop's University (@UBishops) profile pictureBishop's University@UBishops15 Apr 2021
Congrats Dr. Andrea Giusti on being awarded the Italiana Society of General Relativity and Gravitation (SIGRAV) young researcher prize, and best wishes in your new endeavours as an EU Marie Sklodowska Curie Postdoctoral Fellowship at @ETH_en
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arxiv.org/abs/2006.15237v1 K Diethelm et. al. Why fractional derivatives with nonsingular kernels should not be used
Image from math.CA Classical Analysis & ODEs arXiv summaries (@arXiv_math_CA)
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Derivatives with non-singular kernel (such as CF and AB) have so many drawbacks that their use is strongly discouraged. The pre-print of a new paper in @FractalCOST activities is available arxiv.org/abs/2006.15237
Why fractional derivatives with nonsingular kernels should not be used

Why fractional derivatives with nonsingular kernels should not be used

In recent years, many papers discuss the theory and applications of new fractional-order derivatives that are constructed by replacing the singular kernel of the Caputo or Riemann-Liouville...

arxiv.org
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#Mathematics Highly Cited Article by Professor @RGarrappa. "#Numerical Solution of #Fractional Differential Equations: A Survey and a Software Tutorial" mdpi.com/2227-7390/6/2/16 @MDPIOpenAccess @unibait #FDE #MOS #PI #FLMM More related articles at mdpi.com/journal/mathematics…
Image from Mathematics MDPI (@MathematicsMDPI)
Image from Mathematics MDPI (@MathematicsMDPI)
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What kind of initial conditions for fractional-order systems with delay? A paper in CNSNS from @FractalCOST in @COSTprogramme authors.elsevier.com/a/1bDcw…
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Good (and Not So Good) Practices in Computational Methods for Fractional Calculus @MDPIOpenAccess a @FractalCOST outcome in @COSTprogramme mdpi.com/2227-7390/8/3/324
Good (and Not So Good) Practices in Computational Methods for Fractional Calculus

Good (and Not So Good) Practices in Computational Methods for Fractional Calculus

The solution of fractional-order differential problems requires in the majority of cases the use of some computational approach. In general, the numerical treatment of fractional differential...

mdpi.com
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Fractional Prabhakar Calculus: an emerging tool to describe physical phenomena beyond standard fractional calculus. An open access survey in FCAA doi.org/10.1515/fca-2020-000… An outcome of @FractalCOST in @FractalCOST
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People of culture for the Peace in Middle East - Firma la petizione! Sign the petition! chng.it/hRkLf2sV di @ChangeItalia
Firma la petizione

Firma la petizione

People of culture for the Peace in Middle East

change.org
K. Górska, A. Horzela, R. Garrappa : Some results on the complete monotonicity of the Mittag-Leffler functions of Le Roy type arxiv.org/abs/1912.07100 arxiv.org/pdf/1912.07100
Some results on the complete monotonicity of the Mittag-Leffler...

Some results on the complete monotonicity of the Mittag-Leffler...

The paper by R. Garrappa, S. Rogosin, and F. Mainardi, entitled {\em On a generalized three-parameter Wright function of the Le Roy type} and published in [Fract. Calc. Appl. Anal. {\bf 20} (2017)...

arxiv.org
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Some results on the complete monotonicity of Mittag-Leffler functions of Le Roy type degruyter.com/view/j/fca.201… (a paper in the @FractalCOST activity)
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