Efthymios Karatzas is a postdoctoral researcher at Chalmers University of Technology and University of Gothenburg specializing in computational mathematics, optimization, numerical analysis, and their applications. He has over 15 years of experience in research, teaching, and consulting in fields related to applied mathematics, computational fluid dynamics, biology, and chemistry. He is highly skilled in programming languages and scientific computing tools such as Matlab, C/C++, Fortran, and FreeFem++.

1. Efthymios Karatzas
Västra Frölunda
Gothenburg 42671, Sweden
0046(0)767851835
karmakis@gmx.com
Summary
Large scale computations and scientific computing, computational mathematics, op-
timization, optimal control with applications, algorithms, numerical analysis, failure
probabilities of a model and uncertainty, database systems in organization and informa-
tion retrieval, experienced teacher in all education levels, information technology and
programming language educator.
Work Experience
2016– Postdoctoral at Chalmers University of Technology and University of
Gothenburg, Mathematical Sciences Department, Computational Mathematics.
2010–2015 Research at School of Applied Mathematics and Physics, NTUA, simulation
and optimization in pdes of physical and industrial processes using finite elements and
gradient based optimization algorithms for the control, with applicationsin Computa-
tional Fluid Dynamics (evolutionary Stokes equation), Biology and Chemistry .
2010–2015 Teaching at School of Naval Architecture and Marine Engineering - School
of Applied Mathematics and Physics, NTUA, (responsibilities for course deliv-
ery and examinations, designing and supervising project work, marking and submission
of results/projects at undergraduate and postgraduate levels). Detailed achievements:
"Numerical analysis II" (ode’s with Matlab) 2010-2015, "Software for mathematics and
physics" (Matlab-Maxima-Mathematica) 2011-2015, "Special subjects of applied mathe-
matics and use of symbolic languages in problems of mathematical Physics" (Program-
ming in Matlab and Finite Differences), 2013-2014.
1999–2001 Research at Department of Mathematics, University of Patras, theory and
simulation related to industrial problems.
2003–2010 Teaching at Schools, High school, Middle school, Tutorial center.
2001–2003 During my Military Service, Organize and Computerization Logistics for the army
camp, (revenue, expenses, invoicing).
2001–2001 Olympic Training and Consulting Ltd, Database Systems, Organization and In-
formation Retrieval.
2001–2001 Public Power Corporation S.A. Hellas, Distribution Network MV - LV (km).
2000–2001 Library and Information Service, University of Patras, lending agency.
Computer skills
Advanced FreeFem++ (basic knowledge with MPI Parallel version with FreeFem++), C/C++,
Fortran, Matlab, Maxima, Mathematica, Linux, Windows.
Intermediate Python-FEniCS, Java, Pascal, Basic, Computer Hardware and Support, Handling and
Manufacturing Databases (OPAC, Access, SQL server, Visual Basic), html,
Basic Prolog, Logo, Sql, Maple.
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2. Education
2010–2015 PhD in "Applied Mathematics", School of Applied Mathematics and Physics, De-
partment of Mathematics, National Technical University of Athens.
2007–2009 MSc in "Applied Mathematical Sciences - Computational Mathematics",
School of Applied Mathematics and Physics, Department of Mathematics, National
Technical University of Athens.
1999–2001 MSc in "Applied Mathematics - Mathematics in Physics and Industrial Ap-
plications", Department of Mathematics, University of Patras.
2001–2001 "The Database Systems in Organization and Information Retrieval", educa-
tion duration: 400 hours, Olympic Training and Consulting Ltd, Patras.
1994–1999 B.Sc in Mathematics, Major in Applied Mathematics: "Computational
Mathematics and Computing", Department of Mathematics, University of Patras.
Publications
In international refereed journals.
(K. Chrysafinos and E. Karatzas), "Symmetric error estimates for discontinuous Galerkin
time-stepping schemes for optimal control problems constrained to evolutionary Stokes equa-
tions", Computational Optimization and Applications, 60(3), pp 719-751, (2015).
(K. Chrysafinos and E. Karatzas), "Error estimates for discontinuous Galerkin time-stepping
schemes for Robin boundary control problems constrained to parabolic pdes", SIAM Journal
on Numerical Analysis, 52(6), pp.: 2837 – 2862, (2014).
(K. Chrysafinos and E. Karatzas), "Symmetric error estimates for discontinuous Galerkin
approximations for an optimal control problem associated to semilinear parabolic PDEs",
Disc. and Contin. Dynam. Syst. - Ser. B, 17, pp.: 1473 – 1506, (2012).
(K. Chrysafinos, D. Kostas and E. Karatzas), "Error estimates for discontinuous Galerkin
time-stepping schemes for the Brusselator system", on preparation (current 25 pages).
(E. Karatzas), "Algorithms and computational methods for three optimal control problems
arising from chemical kinetics and biology systems", on preparation (current 33 pages).
In Conference proceedings with referee’s.
(K. Chrysafinos and E. Karatzas), "Discontinuous Galerkin time-stepping schemes for Robin
boundary control problems constrained to parabolic PDEs", IFAC Workshop on Control of
Systems Governed by PDEs, (2013).
PhD Thesis
Title Optimal Control and Parabolic Problems, Numerical Analysis and Applications,
Description This thesis explored the idea and concepts of optimal control in evolutionary equations
with applications in Computational fluid dynamics and electric signals propagation.
Supervisor Associate Professor Konstantinos Chrysafinos,
Masters Thesis
Title Analysis and approximations of optimal control problems for evolutionary equations:
basic concepts, some basic results,
Supervisors Associate Professor Konstantinos Chrysafinos & Professor Ion Chrysovergis.
Description This thesis explored the idea and concepts of optimal control in evolutionary equations.
Masters Thesis
Title Aeroacoustic research in the automotive industry,
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3. Description This thesis explored the antenna model through Lighthill approximation, associated to
hyperbolic pdes and sound.
Supervisors Professor Dimitrios Tsoubelis & Associate Professor Vassilis Papageorgiou.
Bachelor Thesis
Title Optimization, linear and integer programming,
Description This thesis explored integer and linear programming, associated to optimization.
Supervisors Professor M. Botsaris.
Grants
2011-2014 Papakyriakopoylos PhD Fellowship.
Languages
Greek Mothertongue
English Advanced level
UNDERSTANDING SPEAKING WRITING
Listening Reading Spoken interactionSpoken production
C1 C1 B2 B2 C1
Swedish Elementary level
UNDERSTANDING SPEAKING WRITING
Listening Reading Spoken interactionSpoken production
A1 A1 A1 - -
Levels: A1/A2: Basic user - B1/B2: Independent user - C1/C2: Proficient user
Common European Framework of Reference for Languages
Interests
- Member of the Greek Mathematical So-
ciety
- Five years member of Cultural Groups of
the University of Patras
- Guitar - Kitesurfing
Reference and/or documentation available upon request.
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