Dr. Jens Saak

Palitta, D.; Tomljanović, Z.; Nakić, I.; Saak, J.: Efficient Solution of Sequences of Parametrized Lyapunov Equations with Applications. Numerical Linear Algebra with Applications 32 (1), e2604 (2025)

Saak, J.; Werner, S. W. R.: Using LDL^T Factorizations in Newton's Method for Solving General Large-Scale Algebraic Riccati Equations. Electronic Transactions on Numerical Analysis 62, pp. 95 - 118 (2024)

Benner, P.; Palitta, D.; Saak, J.: On an integrated Krylov-ADI Solver for Large-Scale Lyapunov Equations. Numerical Algorithms 92, pp. 35 - 63 (2023)

Boege, T.; Fritze, R.; Görgen, C.; Hanselman, J.; Iglezakis, D.; Kastner, L.; Koprucki, T.; Krause, T.; Lehrenfeld, C.; Polla, S. et al.; Reidelbach, M.; Riedel, C.; Saak, J.; Schembera, B.; Tabelow, K.; Weber, M.: Research-Data Management Planning in the German Mathematical Community. EMS Magazine 130, pp. 40 - 47 (2023)

Erxleben, T.; Duwe, K.; Saak, J.; Köhler, M.; Kuhn, M.: Green Storage: Parallel File Systems on ARM. International Journal on Advances in Software 15 (3-4), pp. 200 - 210 (2022)

Hund, M.; Mitchell, T.; Mlinarić, P.; Saak, J.: Optimization-Based Parametric Model Order Reduction via H₂ ⊗ L₂ First-Order Necessary Conditions. SIAM Journal on Scientific Computing 44 (3), pp. A1554 - A1578 (2022)

Vettermann, J.; Steinert, A.; Brecher, C.; Benner, P.; Saak, J.: Compact Thermo-Mechanical Models for the Fast Simulation of Machine Tools with Nonlinear Component Behavior. at-Automatisierungstechnik 70 (8), pp. 692 - 704 (2022)

Fehr, J.; Himpe, C.; Rave, S.; Saak, J.: Sustainable Research Software Hand-Over. Journal of Open Research Software 9 (1), 5 (2021)

Vetterman, J.; Sauerzapf, S.; Naumann, A.; Beitelschmidt, M.; Herzig, R.; Benner, P.; Saak, J.: Model Order Reduction Methods for Coupled Machine Tool Models. MM Science Journal (Special Issue: ICTIMT2021), pp. 4652 - 4659 (2021)

Benner, P.; Bujanović, Z.; Kürschner, P.; Saak, J.: A Numerical Comparison of Different Solvers for Large-Scale, Continuous-Time Algebraic Riccati Equations and LQR Problems. SIAM Journal on Scientific Computing 42 (2), pp. A957 - A996 (2020)

Benner, P.; Heinkenschloss, M.; Saak, J.; Weichelt, H. K.: Efficient Solution of Large-Scale Algebraic Riccati Equations Associated with Index-2 DAEs via the Inexact Low-Rank Newton-ADI Method. Applied Numerical Mathematics 152, pp. 338 - 354 (2020)

Benner, P.; Dufrechou, E.; Ezzatti, P.; Remón, A.; Saak, J.: A GPU-Aware Mixed-Precision Solver for Low-Rank Algebraic Riccati Equations. Concurrency and Computation: Practice and Experience 31 (6), e4462, 12 pages (2019)

Benner, P.; Herzog, R.; Lang, N.; Riedel, I.; Saak, J.: Comparison of Model Order Reduction Methods for Optimal Sensor Placement for Thermo-Elastic Models. Engineering Optimization 51 (3), pp. 465 - 483 (2019)

Köhler, M.; Saak, J.: Frequency Scaling and Energy Efficiency regarding the Gauss-Jordan Elimination Scheme with Application to the Matrix-Sign-Function on OpenPOWER 8. Concurrency and Computation: Practice and Experience 31 (6), e4504, 16 pages (2019)

Saak, J.; Siebelts, D.; Werner, S. W. R.: A Comparison of Second-Order Model Order Reduction Methods for an Artificial Fishtail. at - Automatisierungstechnik 67 (8), pp. 648 - 667 (2019)

Baran, B.; Benner, P.; Heiland, J.; Saak, J.: Optimal Control of a Stefan Problem Fully Coupled with Incompressible Navier-Stokes-Equations and Mesh Movement. Analele Stiintifice ale Universitatii Ovidius Constanta - Seria Matematica 26 (2), pp. 11 - 40 (2018)

Benner, P.; Bujanović, Z.; Kürschner, P.; Saak, J.: RADI: a Low-Rank ADI-Type Algorithm for Large Scale Algebraic Riccati Equations. Numerische Mathematik 138 (2), pp. 301 - 330 (2018)

Hund, M.; Saak, J.: A Connection between Time Domain Model Order Reduction and Moment Matching for LTI Systems. Mathematical and Computer Modelling of Dynamical Systems 24 (5), pp. 455 - 484 (2018)

Anzt, H.; Chow, E.; Saak, J.; Dongarra, J.: Updating Incomplete Factorization Preconditioners for Model Order Reduction. Numerical Algorithms 73 (3), pp. 611 - 630 (2016)

Benner, P.; Heinkenschloss, M.; Saak, J.; Weichelt, H. K.: An Inexact Low-Rank Newton-ADI Method for Large-Scale Algebraic Riccati Equations. Applied Numerical Mathematics 108, pp. 125 - 142 (2016)

Benner, P.; Kürschner, P.; Saak, J.: Low-Rank Newton-ADI Methods for Large Nonsymmetric Algebraic Riccati Equations. Journal of the Franklin Institute 353 (5), pp. 1147 - 1167 (2016)

Benner, P.; Kürschner, P.; Saak, J.: Frequency-Limited Balanced Truncation with Low-Rank Approximations. SIAM Journal on Scientific Computing 38 (1), pp. A471 - A499 (2016)

Benner, P.; Saak, J.; Uddin, M. M.: Balancing Based Model Reduction for Structured Index-2 Unstable Descriptor Systems with Application to Flow Control. Numerical Algebra, Control and Optimization 6 (1), pp. 1 - 20 (2016)

Benner, P.; Saak, J.; Uddin, M. M.: Structure Preserving Model Order Reduction of Large Sparse Second-Order Index-1 Systems and Application to a Mechatronics Model. Mathematical and Computer Modelling of Dynamical Systems 22 (6), pp. 509 - 523 (2016)

Fehr, J.; Heiland, J.; Himpe, C.; Saak, J.: Best Practices for Replicability, Reproducibility and Reusability of Computer-based Experiments exemplified by Model Reduction Software. AIMS Mathematics 1 (3), pp. 261 - 281 (2016)

Köhler, M.; Penke, C.; Saak, J.; Ezzatti, P.: Energy-Aware Solution of Linear Systems with Many Right Hand Sides. Computer Science - Research and Development 31 (4), pp. 215 - 235 (2016)

Köhler, M.; Saak, J.: On GPU Acceleration of Common Solvers for (Quasi-) Triangular Generalized Lyapunov Equations. Parallel Computing 57, pp. 212 - 221 (2016)

Köhler, M.; Saak, J.: On BLAS Level-3 Implementations of Common Solvers for (Quasi-) Triangular Generalized Lyapunov Equations. ACM Transactions on Mathematical Software 43 (1), 3 (2016)

Lang, N.; Saak, J.; Stykel, T.: Balanced Truncation Model Reduction for Linear Time-Varying Systems. Mathematical and Computer Modelling of Dynamical Systems 22 (4), pp. 267 - 281 (2016)

Bänsch, E.; Benner, P.; Saak, J.; Weichelt, H. K.: Riccati-Based Boundary Feedback Stabilization of Incompressible Navier-Stokes Flow. SIAM Journal on Scientific Computing 37 (2), pp. A832 - A858 (2015)

Lang, N.; Mena, H.; Saak, J.: On the Benefits of the LDL^T Factorization for Large-Scale Differential Matrix Equation Solvers. Linear Algebra and its Applications 480, pp. 44 - 71 (2015)

Lang, N.; Saak, J.; Benner, P.; Ihlenfeldt, S.; Nestmann, S.; Schädlich, K.: Towards the Identification of Heat Induction in Chip Removing Processes via an Optimal Control Approach. Production Engineering: Development & Research 9 (3), pp. 343 - 349 (2015)

Saak, J.; Remón, A.: Interview: "Energiesparende Algorithmen?: Hochleistungsrechner auf dem Prüfstand". Laborpraxis (39), pp. 16 - 17 (2015)

Benner, P.; Kürschner, P.; Saak, J.: Self-Generating and Efficient Shift Parameters in ADI Methods for Large Lyapunov and Sylvester Equations. Electronic Transactions on Numerical Analysis 43, pp. 142 - 162 (2014)

Benner, P.; Saak, J.; Schieweck, F.; Skrzypacz, P.; Weichelt, H. K.: A Non-Conforming Composite Quadrilateral Finite Element Pair for Feedback Stabilization of the Stokes Equations. Journal of Numerical Mathematics 22 (3), pp. 191 - 220 (2014)

Lang, N.; Saak, J.; Benner, P.: Model Order Reduction for Systems with Moving Loads. at - Automatisierungstechnik 62 (7), pp. 512 - 522 (2014)

Benner, P.; Kürschner, P.; Saak, J.: Efficient Handling of Complex Shift Parameters in the Low-Rank Cholesky Factor ADI method. Numerical Algorithms 62 (2), pp. 225 - 251 (2013)

Benner, P.; Kürschner, P.; Saak, J.: An Improved Numerical Method for Balanced Truncation for Symmetric Second-Order Systems. Mathematical and Computer Modelling of Dynamical Systems 19 (6), pp. 593 - 615 (2013)

Benner, P.; Saak, J.: Numerical Solution of Large and Sparse Continuous Time Algebraic Matrix Riccati and Lyapunov Equations: A State of the Art Survey. GAMM-Mitteilungen 36 (1), pp. 32 - 52 (2013)

Benner, P.; Saak, J.; Stoll, M.; Weichelt, H. K.: Efficient Solution of Large-Scale Saddle Point Systems Arising in Riccati-Based Boundary Feedback Stabilization of Incompressible Stokes Flow. SIAM Journal on Scientific Computing 35 , pp. S150 - S170 (2013)

Uddin, M. M.; Saak, J.; Kranz, B.; Benner, P.: Computation of a Compact State Space Model for an Adaptive Spindle Head Configuration with Piezo Actuators using Balanced Truncation. Production Engineering 6 (6), pp. 577 - 586 (2012)

Benner, P.; Saak, J.: Efficient Balancing-Based MOR for Large-Scale Second-Order Systems. Mathematical and Computer Modelling of Dynamical Systems 17 (2), pp. 123 - 143 (2011)

Benner, P.; Burger, M.; Göddeke, D.; Görgen, C.; Himpe, C.; Hintermüller, M.; Heiland, J.; Koprucki, T.; Ohlberger, M.; Rave, S. et al.; Reidelbach, M.; Saak, J.; Schöbel, A.; Tabelow, K.; Weber, M.: Die mathematische Forschungsdateninitiative in der NFDI: MaRDI (Mathematical Research Data Initiative). (2022)

Vettermann, J.; Aumann, Q.; Saak, J.; Benner, P.: Rechenzeitsparende Modellierung. In: Thermo-energetische Gestaltung von Werkzeugmaschinen, pp. 199 - 212 (Ed. Brecher, C.). Springer Vieweg, Wiesbaden (2025)

Aumann, Q.; Benner, P.; Saak, J.; Vettermann, J.: Model Order Reduction Strategies for the Computation of Compact Machine Tool Models. In: 3rd International Conference on Thermal Issues in Machine Tools (ICTIMT2023), pp. 132 - 145 (Ed. Ihlenfeldt, S.). Springer International Publishing, Cham (2023)

Benner, P.; Köhler, M.; Saak, J.: Matrix Equations, Sparse Solvers: M-M.E.S.S.-2.0.1 -- Philosophy, Features and Application for (Parametric) Model Order Reduction. In: Model Reduction of Complex Dynamical Systems, pp. 369 - 392 (Eds. Benner, P.; Breiten, T.; Faßbender, H.; Hinze, M.; Stykel, T. et al.). Birkhäuser, Cham (2021)

Mlinarić, P.; Rave, S.; Saak, J.: Parametric Model Order Reduction using pyMOR. In: Model Reduction of Complex Dynamical Systems, pp. 357 - 367 (Eds. Benner, P.; Breiten, T.; Faßbender, H.; Hinze, M.; Stykel, T. et al.). Birkhäuser, Cham, Switzerland (2021)

Rave, S.; Saak, J.: A Non-Stationary Thermal-Block Benchmark Model for Parametric Model Order Reduction. In: Model Reduction of Complex Dynamical Systems, pp. 349 - 356 (Eds. Benner, P.; Breiten, T.; Faßbender, H.; Hinze, M.; Stykel, T. et al.). Birkhäuser, Cham, Switzerland (2021)

Bänsch, E.; Benner, P.; Saak, J.; Weichelt, H. K.: Optimal Control-Based Feedback Stabilization of Multi-Field Flow Problems. In: Trends in PDE Constrained Optimization, pp. 173 - 188 (Eds. Leugering, G.; Benner, P.; Engell, S.; Griewank, A.; Harbrecht, H. et al.). Birkhäuser, Basel (2014)

Benner, P.; Köhler, M.; Saak, J.: Fast Approximate Solution of the Non-Symmetric Generalized Eigenvalue Problem on Multicore Architectures. In: Parallel Computing Accelerating Computational Science and Engineering (CSE), pp. 143 - 152. IOS Press, Amsterdam (2014)

Benner, P.; Saak, J.; Stoll, M.; Weichelt, H. K.: Efficient Solvers for Large-Scale Saddle Point Systems Arising in Feedback Stabilization of Multi-Field Flow Problems. In: System Modeling and Optimization: 26th IFIP TC 7 Conference, CSMO 2013, Klagenfurt, Austria, September 9-13, 2013, Revised Selected Papers, pp. 11 - 20 (Eds. Pötzsche, C.; Heuberger , C.; Kaltenbacher, B.; Rendl, F.). Springer, Berlin Heidelberg (2014)

Köhler, M.; Saak, J.: A shared memory parallel implementation of the IRKA algorithm for H₂ model order reduction. In: Applied Parallel and Scientific Computing, Vol. 7782, pp. 541 - 544. Springer, Berlin (2013)

Hickisch, P.; Saak, J.; Hohlfeld, D.; Bechtold, T.: Two-step Model Order Reduction for a Thermal Finite Element Model of an IGBT Module. In: 11th Vienna International Conference on Mathematical Modelling. 11th Vienna International Conference on Mathematical Modelling, Vienna, Austria, February 19, 2025 - February 21, 2025. (accepted)

Aumann, Q.; Benner, P.; Gosea, I. V.; Saak, J.: A Tangential Interpolation Framework for the AAA Algorithm. 92nd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Aachen, Germany, May 30, 2022 - June 02, 2022. Proceedings in Applied Mathematics and Mechanics 23 (3), e202300183, (2023)

Aumann, Q.; Benner, P.; Saak, J.; Vettermann, J.: Model Order Reduction via Substructuring for a Nonlinear, Differential-Algebraic Machine Tool Model with Moving Loads. 92nd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Aachen, Germany, August 15, 2022 - August 19, 2022. Proceedings in Applied Mathematics and Mechanics 23 (1), e202200286, (2023)

Benner, P.; Lund, K.; Saak, J.: Towards a Benchmark Framework for Model Order Reduction in the Mathematical Research Data Initiative (MaRDI). 92nd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Aachen, Germany, August 15, 2022 - August 19, 2022. Proceedings in Applied Mathematics and Mechanics 23 (3), e202300147, (2023)

Saak, J.; Schulze, J.: Diagonally-Addressed Matrix Nicknack: How to improve SpMV performance. 93rd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Dresden, Germany, May 30, 2023 - June 02, 2023. Proceedings in Applied Mathematics and Mechanics 23 (4), e202300228, (2023)

Naumann, A.; Saak, J.; Sauerzapf, S.; Vettermann, J.; Beitelschmidt, M.; Herzog, R.: Advanced Open Source Data Formats for Geometrically and Physically Coupled Systems. In: Proceedings of Asian Modelica Conference 2022, pp. 81 - 91. Asian Modelica Conference 2022, Tokyo, Japan, November 24, 2022 - November 25, 2022. (2022)

Vettermann, J.; Steinert, A.; Brecher, C.; Benner, P.; Saak, J.: Kompakte thermo-mechanische Modelle zur schnellen Simulation von Werkzeugmaschinen unter Berücksichtigung von Komponenten mit nichtlinearem Verhalten. In: Proceedings of the Workshop des GMA-FA 1.30 "Modellbildung, Identifikation und Simulation in der Automatisierungstechnik" und GMA-FA 1.40 "Systemtheorie und Regelungstechnik", pp. 269 - 283. Workshop des GMA-FA 1.30 "Modellbildung, Identifikation und Simulation in der Automatisierungstechnik" und GMA-FA 1.40 "Systemtheorie und Regelungstechnik", Anif, Austria, September 20, 2021 - September 24, 2021. (2021)

Sauerzapf, S.; Vettermann, J.; Naumann, A.; Saak, J.; Beitelschmidt, M.; Benner, P.: Simulation of the Thermal Behavior of Machine Tools for Efficient Machine Development and Online Correction of the Tool Center Point (TCP)-Displacement. In: Special Interest Group Meeting on Thermal Issues Laboratory for Machine Tools and Production Engineering (WZL). Special Interest Group Meeting on Thermal Issues Laboratory for Machine Tools and Production Engineering (WZL), Aachen, Germany, February 26, 2020 - February 27, 2020. (accepted)

Balicki, L.; Mlinarić, P.; Rave, S.; Saak, J.: System-Theoretic Model Order Reduction with pyMOR. 90th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Vienna, Austria, February 18, 2019 - February 22, 2019. Proceedings in Applied Mathematics and Mechanics 19 (1), e201900459, (2019)

Grundel, S.; Himpe, C.; Saak, J.: On Empirical System Gramians. 90th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Vienna, Austria, February 18, 2019 - February 22, 2019. Proceedings in Applied Mathematics and Mechanics 19 (1), e201900006, (2019)

Saak, J.; Baran, B.; Benner, P.: Riccati-Feedback Control of a Two-Dimensional Two-Phase Stefan Problem. In: Tagungsband GMA-FA 1.30 'Modellbildung, Identifikation und Simulation in der Automatisierungstechnik' und GMA-FA 1.40 'Systemtheorie und Regelungstechnik', Workshops in Anif, Salzburg, 23.-27.09.2019, pp. 478 - 496 (Eds. Meurer, T.; Woittennek, F.). GMA-FA 1.30 'Modellbildung, Identifikation und Simulation in der Automatisierungstechnik' und GMA-FA 1.40 'Systemtheorie und Regelungstechnik', Anif, Austria, September 23, 2019 - September 27, 2019. (2019)

Saak, J.; Köhler, M.; Benner, P.: M-M.E.S.S.-2.0 — The “Matrix Equations, Sparse Solvers” toolbox for MATLAB^® and GNU Octave. In: Tagungsband GMA-FA 1.30 'Modellbildung, Identifikation und Simulation in der Automatisierungstechnik' und GMA-FA 1.40 'Systemtheorie und Regelungstechnik', Workshops in Anif, Salzburg, 23.-27.09.2019, pp. 355 - 362 (Eds. Meurer, T.; Woittennek, F.). GMA-FA 1.30 'Modellbildung, Identifikation und Simulation in der Automatisierungstechnik' und GMA-FA 1.40 'Systemtheorie und Regelungstechnik', Anif, Austria, September 23, 2019 - September 27, 2019. (2019)

Benner, P.; Herzog, R.; Lang, N.; Riedel, I.; Saak, J.: Optimal Sensor Placement based on Model Order Reduction. In: Conference on Thermal Issues in Machine Tools: Proceedings 2018, pp. 355 - 365 (Eds. Ihlenfeldt, S.; Brecher, C.; Putz, M.; Billington, D.). Conference on Thermal Issues in Machine Tools, Dresden, Germany, March 21, 2018 - March 23, 2018. Wissenschaftliche Scripten, Auerbach /Vogtl. (2018)

Hund, M.; Mlinarić, P.; Saak, J.: An H₂xL₂-Optimal Model Order Reduction Approach for Parametric Linear Time-Invariant Systems. 89th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Munich, Germany, March 19, 2018 - March 23, 2018. Proceedings in Applied Mathematics and Mechanics 18 (1), e201800084, (2018)

Saak, J.; Voigt, M.: Model Reduction of Constrained Mechanical Systems in M-M.E.S.S. 9th Vienna International Conference on Mathematical Modelling MATHMOD 2018, Vienna, Austria, February 21, 2018 - February 23, 2018. IFAC-PapersOnLine 51 (2), pp. 661 - 666 (2018)

Baran, B.; Benner, P.; Heiland, J.; Saak, J.: Towards Riccati-Feedback Control of Complex Flows with Moving Interfaces. 88th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Weimar, Germany, March 06, 2017 - March 10, 2017. Proceedings in Applied Mathematics and Mechanics 17 (1), pp. 769 - 770 (2017)

Benner, P.; Saak, J.; Uddin, M. M.: Reduced-Order Modeling of Index-1 Vibrational Systems Using Interpolatory Projections. In: Proceedings of the 19th International Conference on Computer and Information Technology (ICCIT), pp. 134 - 138. 19th International Conference on Computer and Information Technology , Dhaka, Bangladesh, December 18, 2016 - December 20, 2016. (2017)

Himpe, C.; Leibner, T.; Rave, S.; Saak, J.: Fast Low-Rank Empirical Cross Gramians. 88th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Weimar, Germany, March 06, 2017 - March 10, 2017. Proceedings in Applied Mathematics and Mechanics 17, 1 Ed., pp. 841 - 842 (2017)

Köhler, M.; Saak, J.: Frequency Scaling and Energy Efficiency regarding the Gauss-Jordan Elimination Scheme on OpenPower 8. In: Book of Abstracts of 2nd Workshop on Power-Aware Computing, Ringberg Castle, pp. 1 - 6. 2nd Workshop on Power-Aware Computing, Ringberg Castle, Ringberg Castle, Germany, July 05, 2017 - July 08, 2017. (2017)

Köhler, M.; Saak, J.: GPU Accelerated Gauss-Jordan Elimination on the OpenPOWER platform – A case study. 88th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Weimar, Germany, March 06, 2017 - March 10, 2017. Proceedings in Applied Mathematics and Mechanics 17 (1), pp. 845 - 846 (2017)

Hund, M.; Saak, J.: A Connection between Time Domain Model Order Reduction and Moment Matching. Joint 87th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM) and Deutsche Mathematiker-Vereinigung , Braunschweig, March 07, 2016 - March 11, 2016. Proceedings in Applied Mathematics and Mechanics 16 (1), pp. 727 - 728 (2016)

Köhler, M.; Lang, N.; Saak, J.: Solving Differential Matrix Equations Using Parareal. Joint 87th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM) and Deutsche Mathematiker-Vereinigung, Braunschweig, March 07, 2016 - March 11, 2016. Proceedings in Applied Mathematics and Mechanics 16 (1), pp. 847 - 848 (2016)

Baran, B.; Köhler, M.; Prasad, N.; Saak, J.: Numerical Solution of Large Scale Sparse Matrix Equations in Python. 85th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Erlangen, Germany, March 10, 2014 - March 14, 2014. Proceedings in Applied Mathematics and Mechanics 14 (1), pp. 959 - 960 (2014)

Benner, P.; Köhler, M.; Saak, J.: A Cache-Aware Implementation of the Spectral Divide-and-Conquer Approach for the Non-Symmetric Generalized Eigenvalue Problem. 85th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), 2014, Erlangen, Germany, March 10, 2014 - March 14, 2014. Proceedings in Applied Mathematics and Mechanics 14 (1), pp. 819 - 820 (2014)

Benner, P.; Kürschner, P.; Saak, J.: A Reformulated Low-Rank ADI Iteration with Explicit Residual Factors. 84th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Novi Sad, Serbia, March 18, 2013 - March 22, 2013. Proceedings in Applied Mathematics and Mechanics 13 (1), pp. 585 - 586 (2013)

Benner, P.; Lang , N.; Saak, J.: Modeling Structural Variability in Reduced Order Models of Machine Tool Assembly Groups via Parametric MOR. 84th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Novi Sad, Serbia, March 18, 2013 - March 22, 2013. Proceedings in Applied Mathematics and Mechanics 13 (1), pp. 481 - 482 (2013)

Benner, P.; Lang, N.; Saak, J.: Modellordnungsreduktion für geschaltete, gekoppelte thermo-elastische Systeme. In: Tagungsband des GMA-Fachausschusses 1.30 "Modellbildung, Identifikation und Simulation in der Automatisierungstechnik", pp. 215 - 227. GMA Fachausschuss 1.30 "Modellbildung, Identifikation und Simulation in der Automatisierungstechnik", Salzburg, Österreich, September 18, 2013 - September 20, 2013. (2013)

Saak, J.; Uddin, M. M.; Voigt, M.: Modellordnungsreduktion für strukturierte Index-3-Systeme. In: Tagungsband des GMA-Fachausschusses 1.30 "Modellbildung, Identifikation und Simulation in der Automatisierungstechnik", pp. 180 - 190. GMA Fachausschuss 1.30 "Modellbildung, Identifikation und Simulation in der Automatisierungstechnik", Salzburg, Österreich, September 18, 2013 - September 20, 2013. (2013)

Benner, P.; Kranz, B.; Saak, J.; Uddin, M. M.: Efficient Reduced Order State Space Model Computation for a Class of Second Order Index One Systems. 83rd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Darmstadt, March 26, 2012 - March 30, 2012. Proceedings in Applied Mathematics and Mechanics 12 (1), pp. 699 - 700 (2012)

Benner, P.; Kürschner, P.; Saak, J.: Improved Second-Order Balanced Truncation for Symmetric Systems. MATHMOD 2012 - 7th Vienna International Conference on Mathematical Modelling, Vienna, Austria, February 14, 2012 - February 17, 2012. IFAC Proceedings Volumes 45 (2), pp. 758 - 762 (2012)

Benner, P.; Kürschner, P.; Saak, J.: Avoiding Complex Arithmetic in the Low-Rank ADI Method Efficiently. 83rd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Darmstadt, March 26, 2012 - March 30, 2012. Proceedings in Applied Mathematics and Mechanics 12 (1), pp. 639 - 640 (2012)

Benner, P.; Saak, J.; Uddin, M. M.: Second Order to Second Order Balancing for Index-1 Vibrational Systems. In: 7th International Conference on Electrical and Computer Engineering (ICECE), pp. 933 - 936. 7th International Conference on Electrical and Computer Engineering, Dhaka, Bangladesh, December 20, 2012 - December 22, 2012. (2012)

Mach, T.; Saak, J.: How Competitive is the ADI for Tensor Structured Equations? 83rd Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), Darmstadt, March 26, 2012 - March 30, 2012. Proceedings in Applied Mathematics and Mechanics 12 (1 ), pp. 635 - 636 (2012)

Saak, J.; Benner, P.; Kürschner, P.: A Goal-Oriented Dual LRCF-ADI for Balanced Truncation. MATHMOD 2012 - 7th Vienna International Conference on Mathematical Modelling, Vienna, Austria, February 14, 2012 - February 17, 2012. IFAC Proceedings Volumes 45 (2), pp. 752 - 757 (2012)

Bonin, T.; Soppa, A.; Saak, J.; Zäh, M.; Faßbender, H.; Benner, P.: Moderne Modellordnungsreduktionsverfahren für Finite-Elemente-Modelle zur Simulation von Werkmaschinen. In: Fachtagung Mechatronik, pp. 333 - 338. Fachtagung Mechatronik, Dresden, Germany, March 31, 2011 - April 01, 2011. (2011)

Lang, N.; Saak, J.; Stykel, T.: Towards Practical Implementations of Balanced Truncation for LTV Systems. In IFAC-PapersOnLine, 48 (1), pp. 7 - 8. 8th Vienna Conference on Mathematical Modelling - MATHMOD 2015, Vienna, Austria, February 18, 2015 - February 20, 2015. (2015)

Uddin, M. M.; Benner, P.; Saak, J.: Efficient Methods for Reduced Order State Space Modeling of Piezo-Mechanical Systems. GAMM Workshops 2012: Dynamics and Control, Anif/Salzburg, Austria (2012)

Uddin, M. M.; Saak, J.; Benner, P.: Second Order to Second Order Balancing for Index-1 Vibrational Systems. 7th International Conference on Electrical and Computer Engineering (ICECE), Dhaka, Bangladesh (2012)

Christ, S.; Fritzsch, B.; Grossmann, Y. V.; Kempf, D.; Linxweiler, J.; Löffler, F.; Riedl, L.; Thiele, J. P.; Wagner, A. S.; Zanon, L. et al.; Assmann, C.; Brömmel, D.; Caspart, R.; Dogan, M.; Fillinger, S.; Frangenberg, J.; Franke, M.; Frey, A.; Hagenberg, J.; Haupt, C.; Kushnarenko, V.; Neuwirth, S.; Ribizel, T.; Saak, J.; Schieberle, A.; Schima-Voigt, K.; Schmidt, P.; Seibold, H.; Speck, R.; Vleugel, M.; Wellmann, A.; Wieder, P.; Wittke, S.: Code for Science: Bessere Forschung durch bessere Forschungssoftwarekompetenzen, Zenodo, (2025)

Röbenack, K.; Saak, J.: Ausgewählte Beiträge der GMA-Fachausschüsse 2.13 und 2.14. at-Automatisierungstechnik 72 (8), pp. 705 - 706 (2024)

Röbenack, K.; Saak, J.: Ausgewählte Beiträge der GMA-Fachausschüsse 2.13 und 2.14. at-Automatisierungstechnik 72 (8), pp. 705 - 706 (2024)

Benner, P.; Quintana-Ortì, E.; Saak, J.: Introduction to the Special Issue related to the Power Aware Computing Workshop 2019 — PACO 2019. International Journal of High Performance Computing Applications 35 (3), pp. 209 - 210 (2021)

Ezzatti, P.; Quintana-Ortí, E. S.; Remón , A.; Saak, J.: Power‐Aware Computing (PACO 2017): Special Issue. Concurrency and Computation 31 (6), pp. 1 - 3 (2019)

Grepl, M.; Lohmann, B.; Saak, J.: Introduction. Mathematical and Computer Modelling of Dynamical Systems 22 (4), pp. 265 - 266 (2016)

Zhou, B.; Chu, D.; Saak, J.; Xiao, M.: Matrix Equations with Application to Control Theory. Journal of the Franklin Institute 353 (5), pp. 971 - 973 (2016)

Schulze, J.; Saak, J.: An Extension of the Low-Rank Lyapunov ADI to Non-Zero Initial Values and its Applications. (2024)

Baran, B.; Benner, P.; Saak, J.; Stillfjord, T.: Numerical Methods for Closed-Loop Systems with Non-Autonomous Data. (2024)