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Mathematicians are like Frenchmen: whatever you say to them they translate into their own language and forthwith it as something entirely different.

[J. W. von Goethe]

Scientific Work


  Affiliation
  • I am head of the MathOpt junior research group.
  • I am member of the SimOpt research group of Georg Bock and Johannes Schlöder.
  • I am member of the Graduate School Mathematical and Computational Methods for the Sciences.
  • I am member of the Interdisciplinary Center for Scientific Computing (IWR).

  Fields of work / interest
  • Nonlinear Mixed-Integer Dynamic Optimization; Mixed-Integer Nonlinear Programming; Linear Programming ; Simultaneous or One-Shot Methods for DAE and PDE Constrained Nonlinear Optimal Control Problems; Topology Optimization; Numerical Methods for Optimum Experimental Design; Optimization under Uncertainty
  • Applications in Transport, Aerospace, Chemical and Process Engineering, and Systems Biology

  Curriculum Vitae
  • See the tree of my scientific ancestors
  • My CV can be found here (pdf format).

  Press review
  • On this page there is a collection of press articles

  Publications
  • A printable list of my publications can be found in the CV above.
  • Furthermore you may want to search online in the page of the work group Bock/Schlöder.
  • A bibtex file with my publications is available here.
  • The search mask allows the usage of regular expressions:
    • e.g., to search for entries between 2005 and 2006, type: 200[5-6]
    • e.g., for all reftypes that are articles or books, type: article|book
    Do NOT press return!!!

QuickSearch:   Number of matching entries: 0.

AuthorTitleYearJournal/ProceedingsReftypePreprint
Sager, S. MIOCP benchmark site

[BibTeX]

  misc pdf  
BibTeX:
@misc{MINTOC,
  author = {S. Sager},
  title = {{MIOCP} benchmark site},
  url = {http://mintoc.de}
}
Sager, S., Diedam, H. & Engelhart, M. Tailorshop: Optimization Based Analysis and data Generation tOol

[Abstract] [BibTeX]

  misc pdf  
Abstract: Tailorshop: Optimization based Analysis and data Generation tOol Support tool for the computer test scenario "Tailorshop" that is the basis for many psychological studies. Data can be generated, visualized, and provided to optimization solvers.
BibTeX:
@misc{TOBAGO,
  author = {S. Sager and H. Diedam and M. Engelhart},
  title = {Tailorshop: {O}ptimization {B}ased {A}nalysis and data {G}eneration t{O}ol},
  url = {https://sourceforge.net/projects/tobago}
}
Sager, S., Bock, H. & Diehl, M. The Integer Approximation Error in Mixed-Integer Optimal Control

[BibTeX]

2011 Mathematical Programming   article pdf  
BibTeX:
@article{Sager2011,
  author = {S. Sager and H.G. Bock and M. Diehl},
  title = {The Integer Approximation Error in Mixed-Integer Optimal Control},
  journal = {Mathematical Programming},
  year = {2011},
  note = {(accepted)},
  url = {http://mathopt.de/PUBLICATIONS/Sager2011.pdf}
}
Sager, S., Jung, M. & Kirches, C. Combinatorial Integral Approximation

[BibTeX]

2011 Mathematical Methods of Operations Research   article pdf  
BibTeX:
@article{Sager2011a,
  author = {S. Sager and M. Jung and C. Kirches},
  title = {Combinatorial Integral Approximation},
  journal = {Mathematical Methods of Operations Research},
  year = {2011},
  note = {(accepted)},
  url = {http://mathopt.de/PUBLICATIONS/Sager2011a.pdf}
}
Kirches, C., Bock, H., Schlöder, J. & Sager, S. Complementary Condensing for the Direct Multiple Shooting Method

[BibTeX]

2010 Proceedings of the Fourth International Conference on High Performance Scientific Computing: Modeling, Simulation, and Optimization of Complex Processes, Hanoi, Vietnam, March 2--6, 2009   inproceedings pdf  
BibTeX:
@inproceedings{Kirches2010a,
  author = {C. Kirches and H.G. Bock and J.P. Schl\"{o}der and S. Sager},
  title = {Complementary Condensing for the Direct Multiple Shooting Method},
  booktitle = {Proceedings of the Fourth International Conference on High Performance Scientific Computing: Modeling, Simulation, and Optimization of Complex Processes, Hanoi, Vietnam, March 2--6, 2009},
  publisher = {Springer Verlag},
  year = {2010},
  editor = {H.G. Bock and E. Kostina and H.X. Phu and R. Rannacher},
  address = {Berlin Heidelberg New York},
  note = {(accepted)},
  url = {http://mathopt.de/PUBLICATIONS/Kirches2010a.pdf}
}
Kirches, C., Bock, H., Schlöder, J. & Sager, S. Block Structured Quadratic Programming for the Direct Multiple Shooting Method for Optimal Control

[BibTeX]

2010 Optimization Methods and Software   article DOI  
BibTeX:
@article{Kirches2010b,
  author = {C. Kirches and H.G. Bock and J.P. Schl\"{o}der and S. Sager},
  title = {Block Structured Quadratic Programming for the Direct Multiple Shooting Method for Optimal Control},
  journal = {Optimization Methods and Software},
  year = {2010},
  note = {(available online)},
  doi = {http://dx.doi.org/10.1080/10556781003623891}
}
Kirches, C., Sager, S., Bock, H. & Schlöder, J. Time-optimal control of automobile test drives with gear shifts

[BibTeX]

2010 Optimal Control Applications and Methods   article pdf  
BibTeX:
@article{Kirches2010,
  author = {C. Kirches and S. Sager and H.G. Bock and J.P. Schl\"oder},
  title = {Time-optimal control of automobile test drives with gear shifts},
  journal = {Optimal Control Applications and Methods},
  year = {2010},
  volume = {31},
  number = {2},
  pages = {137--153},
  url = {http://mathopt.de/PUBLICATIONS/Kirches2010.pdf}
}
Kirches, C., Wirsching, L., Sager, S. & Bock, H. Efficient Numerics for Nonlinear Model Predictive Control

[BibTeX]

2010 Proceedings of the 13th Belgian--French--German Conference on Optimization   inproceedings pdf  
BibTeX:
@inproceedings{Kirches2010c,
  author = {C. Kirches and L. Wirsching and S. Sager and H.G. Bock},
  title = {Efficient Numerics for Nonlinear Model Predictive Control},
  booktitle = {Proceedings of the 13th Belgian--French--German Conference on Optimization},
  year = {2010},
  note = {(accepted)},
  url = {http://mathopt.de/PUBLICATIONS/Kirches2010c.pdf}
}
Logist, F., Sager, S., Kirches, C. & van Impe, J. Efficient multiple objective optimal control of dynamic systems with integer controls

[BibTeX]

2010 Journal of Process Control   article  
BibTeX:
@article{Logist2010,
  author = {F. Logist and S. Sager and C. Kirches and J.F. van Impe},
  title = {Efficient multiple objective optimal control of dynamic systems with integer controls},
  journal = {{J}ournal of {P}rocess {C}ontrol},
  year = {2010},
  volume = {20},
  number = {7},
  pages = {810--822}
}
Sager, S. A benchmark library of mixed-integer optimal control problems

[BibTeX]

2010 Proceedings MINLP09   inproceedings  
BibTeX:
@inproceedings{Sager2010e,
  author = {S. Sager},
  title = {A benchmark library of mixed-integer optimal control problems},
  booktitle = {Proceedings {MINLP09}},
  year = {2010},
  note = {(accepted)}
}
Sager, S., Barth, C., Diedam, H., Engelhart, M. & Funke, J. Optimization to measure performance in the Tailorshop test scenario --- structured MINLPs and beyond

[BibTeX]

2010 Proceedings EWMINLP10   inproceedings  
BibTeX:
@inproceedings{Sager2010f,
  author = {Sager, S. and Barth, C. and Diedam, H. and Engelhart, M. and Funke, J.},
  title = {Optimization to measure performance in the {T}ailorshop test scenario --- structured {MINLP}s and beyond},
  booktitle = {Proceedings {EWMINLP10}},
  year = {2010},
  pages = {261--269},
  address = {CIRM, Marseille}
}
Sager, S. Reformulations and Algorithms for the Optimization of Switching Decisions in Nonlinear Optimal Control

[BibTeX]

2009 Journal of Process Control   article pdf  
BibTeX:
@article{Sager2009b,
  author = {S. Sager},
  title = {Reformulations and Algorithms for the Optimization of Switching Decisions in Nonlinear Optimal Control},
  journal = {Journal of Process Control},
  year = {2009},
  volume = {19},
  number = {8},
  pages = {1238--1247},
  url = {http://mathopt.de/PUBLICATIONS/Sager2009b.pdf}
}
Sager, S., Bock, H. & Diehl, M. The Integer Approximation Error in Mixed-Integer Optimal Control

[BibTeX]

2009 Optimization Online   article pdf  
BibTeX:
@article{Sager2009a,
  author = {S. Sager and H.G. Bock and M. Diehl},
  title = {The Integer Approximation Error in Mixed-Integer Optimal Control},
  journal = {Optimization Online},
  year = {2009},
  volume = {2},
  pages = {1--16},
  note = {accepted by Mathematical Programming},
  url = {http://www.optimization-online.org/DB_HTML/2009/02/2224.html}
}
Sager, S., Reinelt, G. & Bock, H. Direct Methods With Maximal Lower Bound for Mixed-Integer Optimal Control Problems

[BibTeX]

2009 Mathematical Programming   article pdf  
BibTeX:
@article{Sager2009,
  author = {S. Sager and G. Reinelt and H.G. Bock},
  title = {Direct Methods With Maximal Lower Bound for Mixed-Integer Optimal Control Problems},
  journal = {Mathematical Programming},
  year = {2009},
  volume = {118},
  number = {1},
  pages = {109--149},
  url = {http://mathopt.de/PUBLICATIONS/Sager2009.pdf}
}
Brandt-Pollmann, U., Winkler, R., Sager, S., Moslener, U. & Schlöder, J. Numerical Solution of Optimal Control Problems with Constant Control Delays

[BibTeX]

2008 Computational Economics   article pdf  
BibTeX:
@article{Brandt-Pollmann2008,
  author = {Brandt-Pollmann, U. and Winkler, R. and Sager, S. and Moslener, U. and Schl\"oder, J.P.},
  title = {Numerical Solution of Optimal Control Problems with Constant Control Delays},
  journal = {Computational Economics},
  year = {2008},
  volume = {31},
  number = {2},
  pages = {181--206},
  url = {http://mathopt.uni-hd.de/PUBLICATIONS/Brandt-Pollmann2008.pdf}
}
Grüne, L., Sager, S., Allgöwer, F., Bock, H. & Diehl, M. Vorausschauend planen, gezielt handeln -- über die Regelung und Steuerung technischer Prozesse

[BibTeX]

2008 Produktionsfaktor Mathematik   inbook pdf  
BibTeX:
@inbook{Gruene2008,
  author = {L. Gr\"une and S. Sager and F. Allg\"ower and H.G. Bock and M. Diehl},
  title = {Produktionsfaktor {Mathematik}},
  chapter = {Vorausschauend planen, gezielt handeln -- \"uber die {R}egelung und {S}teuerung technischer {P}rozesse},
  publisher = {acatech},
  year = {2008},
  editor = {M. Gr\"otschel and K. Lucas and V. Mehrmann},
  pages = {27--62},
  note = {ISSN 1861-9924, ISBN 978-3-540-89434-6},
  url = {http://mathopt.de/PUBLICATIONS/Gruene2008.pdf}
}
Sager, S., Bock, H. & Diehl, M. Solving Mixed-integer Control Problems by Sum Up Rounding With Guaranteed Integer Gap

[BibTeX]

2008   techreport pdf  
BibTeX:
@techreport{Sager2008,
  author = {S. Sager and H.G. Bock and M. Diehl},
  title = {Solving Mixed-integer Control Problems by Sum Up Rounding With Guaranteed Integer Gap},
  year = {2008},
  url = {http://www.ub.uni-heidelberg.de/archiv/8384}
}
Sager, S., Kirches, C. & Bock, H. Fast solution of periodic optimal control problems in automobile test-driving with gear shifts

[BibTeX]

2008 Proceedings of the 47th IEEE Conference on Decision and Control (CDC 2008), Cancun, Mexico   inproceedings DOI pdf  
BibTeX:
@inproceedings{Sager2008a,
  author = {S. Sager and C. Kirches and H.G. Bock},
  title = {Fast solution of periodic optimal control problems in automobile test-driving with gear shifts},
  booktitle = {Proceedings of the 47th {IEEE} Conference on Decision and Control ({CDC} 2008), Cancun, Mexico},
  year = {2008},
  pages = {1563--1568},
  note = {ISBN: 978-1-4244-3124-3},
  url = {http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4739014},
  doi = {http://dx.doi.org/10.1109/CDC.2008.4739014}
}
Shaik, O., Sager, S., Slaby, O. & Lebiedz, D. Phase tracking and restoration of circadian rhythms by model-based optimal control

[BibTeX]

2008 IET Systems Biology   article  
BibTeX:
@article{Shaik2008,
  author = {Shaik, O.S. and Sager, S. and Slaby, O. and Lebiedz, D.},
  title = {Phase tracking and restoration of circadian rhythms by model-based optimal control},
  journal = {IET Systems Biology},
  year = {2008},
  volume = {2},
  pages = {16--23}
}
Sager, S. Von diskreten Mathematikern und Wanderungen im Gebirge

[BibTeX]

2007 Bild der Wissenschaft plus   article  
BibTeX:
@article{Sager2007c,
  author = {Sager, S.},
  title = {Von diskreten {M}athematikern und {W}anderungen im {G}ebirge},
  journal = {Bild der Wissenschaft plus},
  year = {2007},
  volume = {11},
  pages = {12--15},
  note = {available at http://www.klaus-tschira-preis.info/BDW_2007.pdf}
}
Sager, S., Brandt-Pollmann, U., Diehl, M., Lebiedz, D. & Bock, H. Exploiting system homogeneities in large scale optimal control problems for speedup of multiple shooting based SQP methods

[BibTeX]

2007 Computers and Chemical Engineering   article  
BibTeX:
@article{Sager2007a,
  author = {S. Sager and U. Brandt-Pollmann and M. Diehl and D. Lebiedz and H.G. Bock},
  title = {Exploiting system homogeneities in large scale optimal control problems for speedup of multiple shooting based {SQP} methods},
  journal = {Computers and Chemical Engineering},
  year = {2007},
  volume = {31},
  pages = {1181--1186}
}
Sager, S., Diehl, M., Singh, G., Küpper, A. & Engell, S. Determining SMB superstructures by mixed-integer control

[BibTeX]

2007 Proceedings OR2006   inproceedings  
BibTeX:
@inproceedings{Sager2007,
  author = {S. Sager and M. Diehl and G. Singh and A. K\"upper and S. Engell},
  title = {Determining {SMB} superstructures by mixed-integer control},
  booktitle = {Proceedings OR2006},
  publisher = {Springer},
  year = {2007},
  editor = {K.-H. Waldmann and U.M. Stocker},
  pages = {37--44},
  address = {Karlsruhe}
}
Slaby, O., Sager, S., Shaik, O., Kummer, U. & Lebiedz, D. Optimal control of self-organized dynamics in cellular signal transduction

[BibTeX]

2007 Mathematical and Computational Modelling of Dynamical Systems   article  
BibTeX:
@article{Slaby2007,
  author = {Slaby, O. and Sager, S. and Shaik, O.S. and Kummer, U. and Lebiedz, D.},
  title = {Optimal control of self-organized dynamics in cellular signal transduction},
  journal = {Mathematical and Computational Modelling of Dynamical Systems},
  year = {2007},
  volume = {13},
  number = {5},
  pages = {487--502}
}
Brandt-Pollmann, U., Winkler, R., Sager, S., Moslener, U. & Schlöder, J. Numerical Solution of Optimal Control Problems with Constant Control Delays

[BibTeX]

2006   techreport pdf  
BibTeX:
@techreport{Brandt-Pollmann2006,
  author = {Brandt-Pollmann, U. and Winkler, R. and Sager, S. and Moslener, U. and Schl\"oder, J.P.},
  title = {Numerical Solution of Optimal Control Problems with Constant Control Delays},
  year = {2006},
  note = {available at http://ssrn.com/abstract=948137},
  url = {http://ssrn.com/abstract=948137}
}
König, R., Schramm, G., Oswald, M., Seitz, H., Sager, S., Zapatka, M., Reinelt, G. & Eils, R. Discovering functional gene expression patterns in the metabolic network of Escherichia coli with wavelets transforms

[BibTeX]

2006 BMC Bioinformatics   article pdf  
BibTeX:
@article{Koenig2006,
  author = {R. K\"onig and G. Schramm and M. Oswald and H. Seitz and S. Sager and M. Zapatka and G. Reinelt and R. Eils},
  title = {Discovering functional gene expression patterns in the metabolic network of Escherichia coli with wavelets transforms},
  journal = {BMC Bioinformatics},
  year = {2006},
  volume = {7},
  pages = {119},
  url = {http://www.biomedcentral.com/1471-2105/7/119}
}
Lebiedz, D., Sager, S., Shaik, O. & Slaby, O. Optimal control of self-organized dynamics in cellular signal transduction

[BibTeX]

2006 Proceedings of the 5th MATHMOD conference   inproceedings  
BibTeX:
@inproceedings{Lebiedz2006,
  author = {D. Lebiedz and S. Sager and O.S. Shaik and O. Slaby},
  title = {Optimal control of self-organized dynamics in cellular signal transduction},
  booktitle = {Proceedings of the 5th {MATHMOD} conference},
  year = {2006},
  series = {{ARGESIM}-Reports, {ISBN} 3-901608-25-7},
  address = {Vienna}
}
Sager, S. Numerische Methoden für Probleme der gemischt-ganzzahligen Optimalen Steuerung

[BibTeX]

2006 OR News   article  
BibTeX:
@article{Sager2006a,
  author = {Sager, S.},
  title = {Numerische {M}ethoden f\"ur {P}robleme der gemischt-ganzzahligen {O}ptimalen {S}teuerung},
  journal = {OR News},
  year = {2006},
  volume = {28},
  pages = {30--31}
}
Sager, S. Numerical methods for mixed--integer optimal control problems

[BibTeX]

2006 School: Universität Heidelberg   phdthesis pdf  
BibTeX:
@phdthesis{Sager2006b,
  author = {Sager, S.},
  title = {Numerical methods for mixed--integer optimal control problems},
  school = {Universit\"at Heidelberg},
  year = {2006},
  url = {http://sager1.de/sebastian/downloads/Sager2005.pdf}
}
Sager, S., Bock, H., Diehl, M., Reinelt, G. & Schlöder, J. Numerical methods for optimal control with binary control functions applied to a Lotka-Volterra type fishing problem

[BibTeX]

2006 Recent Advances in Optimization (Proceedings of the 12th French-German-Spanish Conference on Optimization)   inproceedings  
BibTeX:
@inproceedings{Sager2006,
  author = {S. Sager and H.G. Bock and M. Diehl and G. Reinelt and J.P. Schl\"oder},
  title = {Numerical methods for optimal control with binary control functions applied to a {L}otka-{V}olterra type fishing problem},
  booktitle = {Recent Advances in Optimization (Proceedings of the 12th {F}rench-{G}erman-{S}panish Conference on Optimization)},
  publisher = {Springer},
  year = {2006},
  editor = {A. Seeger},
  volume = {563},
  series = {Lectures Notes in Economics and Mathematical Systems},
  pages = {269--289},
  address = {Heidelberg}
}
Brandt-Pollmann, U., Lebiedz, D., Diehl, M., Sager, S. & Schlöder, J. Real-time nonlinear feedback control of pattern formation in (bio)chemical reaction--diffusion processes: A model study

[BibTeX]

2005 Chaos   article  
BibTeX:
@article{Brandt-Pollmann2005a,
  author = {Brandt-Pollmann, U. and Lebiedz, D. and Diehl, M. and Sager, S. and Schl\"oder, J.P.},
  title = {Real-time nonlinear feedback control of pattern formation in (bio)chemical reaction--diffusion processes: {A} model study},
  journal = {Chaos},
  year = {2005},
  volume = {15},
  pages = {033901},
  note = {selected for online-publication in Virtual Journal of Biological Physics Research, July 15, 2005}
}
Körkel, S., Qu, H., Rücker, G. & Sager, S. Derivative Based vs. Derivative Free Optimization Methods for Nonlinear Optimum Experimental Design

[BibTeX]

2005 Proceedings of HPCA2004 Conference, August 8-10, 2004   inproceedings  
BibTeX:
@inproceedings{Koerkel2005,
  author = {K\"orkel, S. and Qu, H. and R\"ucker, G. and Sager, S.},
  title = {Derivative Based vs. Derivative Free Optimization Methods for Nonlinear Optimum Experimental Design},
  booktitle = {Proceedings of HPCA2004 Conference, August 8-10, 2004},
  publisher = {Springer},
  year = {2005},
  pages = {339--345},
  address = {Shanghai}
}
Lebiedz, D., Sager, S., Bock, H. & Lebiedz, P. Annihilation of limit cycle oscillations by identification of critical phase resetting stimuli via mixed-integer optimal control methods

[BibTeX]

2005 Physical Review Letters   article  
BibTeX:
@article{Lebiedz2005,
  author = {Lebiedz, D. and Sager, S. and Bock, H.G. and Lebiedz, P.},
  title = {Annihilation of limit cycle oscillations by identification of critical phase resetting stimuli via mixed-integer optimal control methods},
  journal = {Physical Review Letters},
  year = {2005},
  volume = {95},
  pages = {108303}
}
Sager, S. Numerical methods for mixed--integer optimal control problems

[BibTeX]

2005 Publisher: Der andere Verlag   book pdf  
BibTeX:
@book{Sager2005,
  author = {Sager, S.},
  title = {Numerical methods for mixed--integer optimal control problems},
  publisher = {Der andere {V}erlag},
  year = {2005},
  address = {T\"onning, L\"ubeck, Marburg},
  note = {ISBN 3-89959-416-9. Available at http://sager1.de/sebastian/downloads/Sager2005.pdf},
  url = {http://sager1.de/sebastian/downloads/Sager2005.pdf}
}
Sager, S. Hohe Mathematik beim Science Picnic

[BibTeX]

2005   misc pdf  
BibTeX:
@misc{Sager2005a,
  author = {Sager, S.},
  title = {Hohe {M}athematik beim {S}cience {P}icnic},
  year = {2005},
  url = {http://www.sager1.de/sebastian/downloads/Sager2005a.jpg}
}
Sager, S. Wissenschaftsvolksfest in Warschau

[BibTeX]

2005   misc pdf  
BibTeX:
@misc{Sager2005b,
  author = {S. Sager},
  title = {Wissenschaftsvolksfest in {W}arschau},
  year = {2005},
  note = {http://www.dfg.de/info_wissenschaftler/nw/aktuelles/archiv/2005/science_picnic.html},
  url = {http://www.dfg.de/info_wissenschaftler/nw/aktuelles/archiv/2005/science_picnic.html}
}
Sager, S. Lange Schritte im Dualen Simplex-Algorithmus

[BibTeX]

2001 School: Universität Heidelberg   mastersthesis pdf  
BibTeX:
@mastersthesis{Sager2001,
  author = {Sager, S.},
  title = {Lange {S}chritte im {D}ualen {S}implex-{A}lgorithmus},
  school = {Universit\"at Heidelberg},
  year = {2001},
  url = {http://mathopt.de/PUBLICATIONS/Sager2001.pdf}
}

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