American Institute of Mathematical Sciences

Advanced
March  2017, 7(1): 73-170. doi: 10.3934/mcrf.2017005

Decompositions and bang-bang properties

Gengsheng Wang 1, and  Yubiao Zhang 2,3,,

1. 

School of Mathematics and Statistics, Collaborative Innovation Centre of Mathematics, Wuhan University, Wuhan 430072, China
2. 

School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China
3. 

Center for Applied Mathematics, Tianjin University, Tianjin 300072, China

* Corresponding author:Yubiao Zhang

Received  April 2016 Revised  July 2016 Published  December 2016

Fund Project: The first author was partially supported by the National Natural Science Foundation of China under grant 11571264. The second author was partially supported by the National Natural Science Foundation of China under grants 11571264 and 11371285.

We study the bang-bang properties of minimal time and minimal norm control problems (where the target set is the origin of the state space and the controlled system is linear and time-invariant) from a new perspective. More precisely, we study how the bang-bang property of each minimal time (or minimal norm) problem depends on a pair of parameters $(M, y_0)$ (or $(T,y_0)$), where $M>0$ is a bound of controls and $y_0$ is the initial state (or $T>0$ is an ending time and $y_0$ is the initial state). The controlled system may have neither the $L^∞$-null controllability nor the backward uniqueness property.

Keywords: Minimal time controls, minimal norm controls, bang-bang properties, decompositions, evolution systems, reachable subspaces.
Mathematics Subject Classification: Primary: 93B03; Secondary: 93C35.
Citation: Gengsheng Wang, Yubiao Zhang. Decompositions and bang-bang properties. Mathematical Control & Related Fields, 2017, 7 (1) : 73-170. doi: 10.3934/mcrf.2017005
References:
[1]

F. Ammar Khodja, A. Benabdallah, M. González-Burgos and L. de Teresa, A new relation between the condensation index of complex sequences and the null controllability of parabolic systems, C. R. Math. Acad. Sci. Paris., 351 (2013), 743-746.  doi: 10.1016/j.crma.2013.09.014.  Google Scholar

[2]

F. Ammar Khodja, A. Benabdallah, M. González-Burgos and L. de Teresa, Minimal time of controllability of two parabolic equations with disjoint control and coupling domains, C. R. Math. Acad. Sci. Paris, 352 (2014), 391-396.  doi: 10.1016/j.crma.2014.03.004.  Google Scholar

[3]

F. Ammar Khodja, A. Benabdallah, M. González-Burgos and L. de Teresa, Minimal time for the null controllability of parabolic systems: the effect of the condensation index of complex sequences, J. Funct. Anal., 267 (2014), 2077-2151.  doi: 10.1016/j.jfa.2014.07.024.  Google Scholar

[4]

J. Apraiz, L. Escauriaza, G. Wang and C. Zhang, Observability inequalities and measurable sets, J. Eur. Math. Soc., 16 (2014), 2433-2475.  doi: 10.4171/JEMS/490.  Google Scholar

[5]

N. Arada and J.-P. Raymond, Time optimal problems with Dirichlet boundary controls, Discrete Contin. Dyn. Syst., 9 (2003), 1549-1570.  doi: 10.3934/dcds.2003.9.1549.  Google Scholar

[6]

V. Barbu, Analysis and Control of Nonlinear Infinite-dimensional Systems, Academic Press, Boston, 1993.  Google Scholar

[7]

O. Cârjǎ, On continuity of the minimal time function for distributed control systems, Boll. Un. Mat. Ital. -A, 4 (1985), 293-302.   Google Scholar

[8]

J. M. Coron, Control and Nonlinearity, American Mathematical Society, 2007.  Google Scholar

[9]

H. O. Fattorini, Infinite Dimensional Linear Control Systems: The Time Optimal and Norm Optimal Problems, ELSEVIER, 2005.  Google Scholar

[10]

H. O. Fattorini, Time-optimal control of solutions of operational differential equations, J. SIAM Control -A, 2 (1964), 54-59.  doi: 10.1137/0302005.  Google Scholar

[11]

H. O. Fattorini, The time-optimal control problem in Banach spaces, Appl. Math. Optim., 1 (1974/75), 163-188.  doi: 10.1007/BF01449028.  Google Scholar

[12]

H. O. Fattorini, Some remarks on the time optimal control problem in infinite dimension, Calculus of Variations and Optimal Control, 411 (2000), 77-96.   Google Scholar

[13]

H. O. Fattorini, Existence of singular extremals and singular functionals in reachable spaces, J. Evol. Equ., 1 (2001), 325-347.  doi: 10.1007/PL00001374.  Google Scholar

[14]

H. O. Fattorini, Time and norm optimal controls: A survey of recent results and open problems, Acta Math. Sci. -B, 31 (2011), 2203-2218.  doi: 10.1016/S0252-9602(11)60394-9.  Google Scholar

[15]

W. Gong and N. Yan, Finite element method and its error estimates for the time optimal controls of heat equation, Int. J. Numer. Anal. Model., 13 (2016), 265-279.   Google Scholar

[16]

F. Gozzi and P. Loreti, Regularity of the minimum time function and minimal energy problems: the linear case, SIAM J. Control Optim., 37 (1999), 1195-1221.  doi: 10.1137/S0363012996312763.  Google Scholar

[17]

K. Ito and K. Kunisch, Semismooth Newton methods for time-optimal control for a class of ODEs, SIAM J. Control Optim., 48 (2010), 3997-4013.  doi: 10.1137/090753905.  Google Scholar

[18]

K. Kunisch and L. Wang, Time optimal control of the heat equation with pointwise control constraints, ESAIM Control Optim. Calc. Var., 19 (2013), 460-485.  doi: 10.1051/cocv/2012017.  Google Scholar

[19]

K. Kunisch and L. Wang, Time optimal controls of the linear Fitzhugh-Nagumo equation with pointwise control constraints, J. Math. Anal. Appl., 395 (2012), 114-130.  doi: 10.1016/j.jmaa.2012.05.028.  Google Scholar

[20]

X. Li and J. Yong, Optimal Control Theory for Infinite Dimensional Systems, Birkhäuser, Boston, 1995. doi: 10.1007/978-1-4612-4260-4.  Google Scholar

[21]

P. Lin and G. Wang, Some properties for blowup parabolic equations and their application, J. Math. Pures Appl., 101 (2014), 223-255.  doi: 10.1016/j.matpur.2013.06.001.  Google Scholar

[22]

J. Lohéac and M. Tucsnak, Maximum principle and bang-bang property of time optimal controls for Schrödinger-type systems, SIAM J. Control Optim., 51 (2013), 4016-4038.  doi: 10.1137/120872437.  Google Scholar

[23]

J. Lohéac and E. Zuazua, Norm saturating property of time optimal controls for wave-type equations, 2016, <hal-01258878>. Google Scholar

[24]

H. Lou, J. Wen and Y. Xu, Time optimal control problems for some non-smooth systems, Math. Control Relat. Fields, 4 (2014), 289-314.  doi: 10.3934/mcrf.2014.4.289.  Google Scholar

[25]

Q. Lü, Bang-bang principle of time optimal controls and null controllability of fractional order parabolic equations, Acta Math. Sin. (Engl. Ser.), 26 (2010), 2377-2386.  doi: 10.1007/s10114-010-9051-1.  Google Scholar

[26]

S. Micu, I. Roventa and M. Tucsnak, Time optimal boundary controls for the heat equation, J. Funct. Anal., 263 (2012), 25-49.  doi: 10.1016/j.jfa.2012.04.009.  Google Scholar

[27]

V. Mizel and T. Seidman, An abstract bang-bang principle and time-optimal boundary control of the heat equation, SIAM J. Control Optim., 35 (1997), 1204-1216.  doi: 10.1137/S0363012996265470.  Google Scholar

[28]

A. Münch and E. Zuazua, Numerical approximation of null controls for the heat equation: Ill-posedness and remedies, Inverse Problems, 26 (2010), 085018, 39pp. doi: 10.1088/0266-5611/26/8/085018.  Google Scholar

[29]

A. Pazy, Semigroups of Linear Operatots and Applications to Partial Differential Equations, Springer-Verlag, New York, 1983. doi: 10.1007/978-1-4612-5561-1.  Google Scholar

[30]

N. V. Petrov, The Bellman problem for a time-optimality problem, Prikl. Mat. Meh., 34 (1970), 820-826.   Google Scholar

[31]

K. D. Phung and G. Wang, An observability estimate for parabolic equations from a measurable set in time and its applications, J. Eur. Math. Soc., 15 (2013), 681-703.  doi: 10.4171/JEMS/371.  Google Scholar

[32]

K. D. Phung and G. Wang, Quantitative unique continuation for the semilinear heat equation in a convex domain, J. Funct. Anal., 259 (2010), 1230-1247.  doi: 10.1016/j.jfa.2010.04.015.  Google Scholar

[33]

K. D. Phung, L. Wang and C. Zhang, Bang-bang property for time optimal control of semilinear heat equation, Ann. Inst. H. Poincaré Anal. Non Linéaire, 31 (2014), 477-499.  doi: 10.1016/j.anihpc.2013.04.005.  Google Scholar

[34]

K. D. Phung, G. Wang and X. Zhang, On the existence of time optimal controls for linear evolution equations, Discrete Contin. Dyn. Syst. -B, 8 (2007), 925-941.  doi: 10.3934/dcdsb.2007.8.925.  Google Scholar

[35]

W. Rudin, Real and Complex Analysis, 3rd edition, McGraw-Hill Companies, 1987.  Google Scholar

[36]

E. J. P. G. Schmidt, The "bang-bang" principle for the time-optimal problem in boundary control of the heat equation, SIAM J. Control Optim., 18 (1980), 101-107.  doi: 10.1137/0318008.  Google Scholar

[37]

C. Silva and E. Trélat, Smooth regularization of bang-bang optimal control problems, IEEE Trans. Automat. Control, 55 (2010), 2488-2499.  doi: 10.1109/TAC.2010.2047742.  Google Scholar

[38]

E. D. Sontag, Mathematical Control Theory: Deterministic Finite-Dimensional Systems, 2nd edition, Springer-Verlag, New York, 1998. doi: 10.1007/978-1-4612-0577-7.  Google Scholar

[39]

M. Tucsnak and G. Weiss, Observation and Control for Operator Semigroups, Birkhäuser Verlag AG, 2009. doi: 10.1007/978-3-7643-8994-9.  Google Scholar

[40]

G. Wang, L∞-null controllability for the heat equation and its consequences for the time optimal control problem, SIAM J. Control Optim., 47 (2008), 1701-1720.  doi: 10.1137/060678191.  Google Scholar

[41]

G. Wang and Y. Xu, Equivalence of three different kinds of optimal control problems for heat equations and its applications, SIAM J. Control Optim., 51 (2013), 848-880.  doi: 10.1137/110852449.  Google Scholar

[42]

G. Wang and Y. Xu, Advantages for controls imposed in a proper subset, Discrete Contin. Dyn. Syst. -B, 18 (2013), 2427-2439.  doi: 10.3934/dcdsb.2013.18.2427.  Google Scholar

[43]

G. Wang, Y. Xu and Y. Zhang, Attainable subspaces and the bang-bang property of time optimal controls for heat equations, SIAM J. Control Optim., 53 (2015), 592-621.  doi: 10.1137/140966022.  Google Scholar

[44]

G. Wang and C. Zhang, Observability inequalities from measurable sets for some evolution equations, preprint, arXiv: 1406.3422v1. Google Scholar

[45]

G. Wang and G. Zheng, An approach to the optimal time for a time optimal control problem of an internally controlled heat equation, SIAM J. Control Optim., 50 (2012), 601-628.  doi: 10.1137/100793645.  Google Scholar

[46]

G. Wang and E. Zuazua, On the equivalence of minimal time and minimal norm controls for internally controlled heat equations, SIAM J. Control Optim., 50 (2012), 2938-2958.  doi: 10.1137/110857398.  Google Scholar

[47]

H. Yu, Approximation of time optimal controls for heat equations with perturbations in the system potential, SIAM J. Control Optim., 52 (2014), 1663-1692.  doi: 10.1137/120904251.  Google Scholar

[48]

C. Zhang, An observability estimate for the heat equation from a product of two measurable sets, J. Math. Anal. Appl., 396 (2012), 7-12.  doi: 10.1016/j.jmaa.2012.05.082.  Google Scholar

[49]

C. Zhang, The time optimal control with constraints of the rectangular type for linear time-varying ODEs, SIAM J. Control Optim., 51 (2013), 1528-1542.  doi: 10.1137/110858999.  Google Scholar

[50]

G. Zheng and B. Ma, A time optimal control problem of some linear switching controlled ordinary differential equations, Adv. Difference Equ., 2012 (2012), 1-7.  doi: 10.1186/1687-1847-2012-52.  Google Scholar

show all references

References:
[1]

F. Ammar Khodja, A. Benabdallah, M. González-Burgos and L. de Teresa, A new relation between the condensation index of complex sequences and the null controllability of parabolic systems, C. R. Math. Acad. Sci. Paris., 351 (2013), 743-746.  doi: 10.1016/j.crma.2013.09.014.  Google Scholar

[2]

F. Ammar Khodja, A. Benabdallah, M. González-Burgos and L. de Teresa, Minimal time of controllability of two parabolic equations with disjoint control and coupling domains, C. R. Math. Acad. Sci. Paris, 352 (2014), 391-396.  doi: 10.1016/j.crma.2014.03.004.  Google Scholar

[3]

F. Ammar Khodja, A. Benabdallah, M. González-Burgos and L. de Teresa, Minimal time for the null controllability of parabolic systems: the effect of the condensation index of complex sequences, J. Funct. Anal., 267 (2014), 2077-2151.  doi: 10.1016/j.jfa.2014.07.024.  Google Scholar

[4]

J. Apraiz, L. Escauriaza, G. Wang and C. Zhang, Observability inequalities and measurable sets, J. Eur. Math. Soc., 16 (2014), 2433-2475.  doi: 10.4171/JEMS/490.  Google Scholar

[5]

N. Arada and J.-P. Raymond, Time optimal problems with Dirichlet boundary controls, Discrete Contin. Dyn. Syst., 9 (2003), 1549-1570.  doi: 10.3934/dcds.2003.9.1549.  Google Scholar

[6]

V. Barbu, Analysis and Control of Nonlinear Infinite-dimensional Systems, Academic Press, Boston, 1993.  Google Scholar

[7]

O. Cârjǎ, On continuity of the minimal time function for distributed control systems, Boll. Un. Mat. Ital. -A, 4 (1985), 293-302.   Google Scholar

[8]

J. M. Coron, Control and Nonlinearity, American Mathematical Society, 2007.  Google Scholar

[9]

H. O. Fattorini, Infinite Dimensional Linear Control Systems: The Time Optimal and Norm Optimal Problems, ELSEVIER, 2005.  Google Scholar

[10]

H. O. Fattorini, Time-optimal control of solutions of operational differential equations, J. SIAM Control -A, 2 (1964), 54-59.  doi: 10.1137/0302005.  Google Scholar

[11]

H. O. Fattorini, The time-optimal control problem in Banach spaces, Appl. Math. Optim., 1 (1974/75), 163-188.  doi: 10.1007/BF01449028.  Google Scholar

[12]

H. O. Fattorini, Some remarks on the time optimal control problem in infinite dimension, Calculus of Variations and Optimal Control, 411 (2000), 77-96.   Google Scholar

[13]

H. O. Fattorini, Existence of singular extremals and singular functionals in reachable spaces, J. Evol. Equ., 1 (2001), 325-347.  doi: 10.1007/PL00001374.  Google Scholar

[14]

H. O. Fattorini, Time and norm optimal controls: A survey of recent results and open problems, Acta Math. Sci. -B, 31 (2011), 2203-2218.  doi: 10.1016/S0252-9602(11)60394-9.  Google Scholar

[15]

W. Gong and N. Yan, Finite element method and its error estimates for the time optimal controls of heat equation, Int. J. Numer. Anal. Model., 13 (2016), 265-279.   Google Scholar

[16]

F. Gozzi and P. Loreti, Regularity of the minimum time function and minimal energy problems: the linear case, SIAM J. Control Optim., 37 (1999), 1195-1221.  doi: 10.1137/S0363012996312763.  Google Scholar

[17]

K. Ito and K. Kunisch, Semismooth Newton methods for time-optimal control for a class of ODEs, SIAM J. Control Optim., 48 (2010), 3997-4013.  doi: 10.1137/090753905.  Google Scholar

[18]

K. Kunisch and L. Wang, Time optimal control of the heat equation with pointwise control constraints, ESAIM Control Optim. Calc. Var., 19 (2013), 460-485.  doi: 10.1051/cocv/2012017.  Google Scholar

[19]

K. Kunisch and L. Wang, Time optimal controls of the linear Fitzhugh-Nagumo equation with pointwise control constraints, J. Math. Anal. Appl., 395 (2012), 114-130.  doi: 10.1016/j.jmaa.2012.05.028.  Google Scholar

[20]

X. Li and J. Yong, Optimal Control Theory for Infinite Dimensional Systems, Birkhäuser, Boston, 1995. doi: 10.1007/978-1-4612-4260-4.  Google Scholar

[21]

P. Lin and G. Wang, Some properties for blowup parabolic equations and their application, J. Math. Pures Appl., 101 (2014), 223-255.  doi: 10.1016/j.matpur.2013.06.001.  Google Scholar

[22]

J. Lohéac and M. Tucsnak, Maximum principle and bang-bang property of time optimal controls for Schrödinger-type systems, SIAM J. Control Optim., 51 (2013), 4016-4038.  doi: 10.1137/120872437.  Google Scholar

[23]

J. Lohéac and E. Zuazua, Norm saturating property of time optimal controls for wave-type equations, 2016, <hal-01258878>. Google Scholar

[24]

H. Lou, J. Wen and Y. Xu, Time optimal control problems for some non-smooth systems, Math. Control Relat. Fields, 4 (2014), 289-314.  doi: 10.3934/mcrf.2014.4.289.  Google Scholar

[25]

Q. Lü, Bang-bang principle of time optimal controls and null controllability of fractional order parabolic equations, Acta Math. Sin. (Engl. Ser.), 26 (2010), 2377-2386.  doi: 10.1007/s10114-010-9051-1.  Google Scholar

[26]

S. Micu, I. Roventa and M. Tucsnak, Time optimal boundary controls for the heat equation, J. Funct. Anal., 263 (2012), 25-49.  doi: 10.1016/j.jfa.2012.04.009.  Google Scholar

[27]

V. Mizel and T. Seidman, An abstract bang-bang principle and time-optimal boundary control of the heat equation, SIAM J. Control Optim., 35 (1997), 1204-1216.  doi: 10.1137/S0363012996265470.  Google Scholar

[28]

A. Münch and E. Zuazua, Numerical approximation of null controls for the heat equation: Ill-posedness and remedies, Inverse Problems, 26 (2010), 085018, 39pp. doi: 10.1088/0266-5611/26/8/085018.  Google Scholar

[29]

A. Pazy, Semigroups of Linear Operatots and Applications to Partial Differential Equations, Springer-Verlag, New York, 1983. doi: 10.1007/978-1-4612-5561-1.  Google Scholar

[30]

N. V. Petrov, The Bellman problem for a time-optimality problem, Prikl. Mat. Meh., 34 (1970), 820-826.   Google Scholar

[31]

K. D. Phung and G. Wang, An observability estimate for parabolic equations from a measurable set in time and its applications, J. Eur. Math. Soc., 15 (2013), 681-703.  doi: 10.4171/JEMS/371.  Google Scholar

[32]

K. D. Phung and G. Wang, Quantitative unique continuation for the semilinear heat equation in a convex domain, J. Funct. Anal., 259 (2010), 1230-1247.  doi: 10.1016/j.jfa.2010.04.015.  Google Scholar

[33]

K. D. Phung, L. Wang and C. Zhang, Bang-bang property for time optimal control of semilinear heat equation, Ann. Inst. H. Poincaré Anal. Non Linéaire, 31 (2014), 477-499.  doi: 10.1016/j.anihpc.2013.04.005.  Google Scholar

[34]

K. D. Phung, G. Wang and X. Zhang, On the existence of time optimal controls for linear evolution equations, Discrete Contin. Dyn. Syst. -B, 8 (2007), 925-941.  doi: 10.3934/dcdsb.2007.8.925.  Google Scholar

[35]

W. Rudin, Real and Complex Analysis, 3rd edition, McGraw-Hill Companies, 1987.  Google Scholar

[36]

E. J. P. G. Schmidt, The "bang-bang" principle for the time-optimal problem in boundary control of the heat equation, SIAM J. Control Optim., 18 (1980), 101-107.  doi: 10.1137/0318008.  Google Scholar

[37]

C. Silva and E. Trélat, Smooth regularization of bang-bang optimal control problems, IEEE Trans. Automat. Control, 55 (2010), 2488-2499.  doi: 10.1109/TAC.2010.2047742.  Google Scholar

[38]

E. D. Sontag, Mathematical Control Theory: Deterministic Finite-Dimensional Systems, 2nd edition, Springer-Verlag, New York, 1998. doi: 10.1007/978-1-4612-0577-7.  Google Scholar

[39]

M. Tucsnak and G. Weiss, Observation and Control for Operator Semigroups, Birkhäuser Verlag AG, 2009. doi: 10.1007/978-3-7643-8994-9.  Google Scholar

[40]

G. Wang, L∞-null controllability for the heat equation and its consequences for the time optimal control problem, SIAM J. Control Optim., 47 (2008), 1701-1720.  doi: 10.1137/060678191.  Google Scholar

[41]

G. Wang and Y. Xu, Equivalence of three different kinds of optimal control problems for heat equations and its applications, SIAM J. Control Optim., 51 (2013), 848-880.  doi: 10.1137/110852449.  Google Scholar

[42]

G. Wang and Y. Xu, Advantages for controls imposed in a proper subset, Discrete Contin. Dyn. Syst. -B, 18 (2013), 2427-2439.  doi: 10.3934/dcdsb.2013.18.2427.  Google Scholar

[43]

G. Wang, Y. Xu and Y. Zhang, Attainable subspaces and the bang-bang property of time optimal controls for heat equations, SIAM J. Control Optim., 53 (2015), 592-621.  doi: 10.1137/140966022.  Google Scholar

[44]

G. Wang and C. Zhang, Observability inequalities from measurable sets for some evolution equations, preprint, arXiv: 1406.3422v1. Google Scholar

[45]

G. Wang and G. Zheng, An approach to the optimal time for a time optimal control problem of an internally controlled heat equation, SIAM J. Control Optim., 50 (2012), 601-628.  doi: 10.1137/100793645.  Google Scholar

[46]

G. Wang and E. Zuazua, On the equivalence of minimal time and minimal norm controls for internally controlled heat equations, SIAM J. Control Optim., 50 (2012), 2938-2958.  doi: 10.1137/110857398.  Google Scholar

[47]

H. Yu, Approximation of time optimal controls for heat equations with perturbations in the system potential, SIAM J. Control Optim., 52 (2014), 1663-1692.  doi: 10.1137/120904251.  Google Scholar

[48]

C. Zhang, An observability estimate for the heat equation from a product of two measurable sets, J. Math. Anal. Appl., 396 (2012), 7-12.  doi: 10.1016/j.jmaa.2012.05.082.  Google Scholar

[49]

C. Zhang, The time optimal control with constraints of the rectangular type for linear time-varying ODEs, SIAM J. Control Optim., 51 (2013), 1528-1542.  doi: 10.1137/110858999.  Google Scholar

[50]

G. Zheng and B. Ma, A time optimal control problem of some linear switching controlled ordinary differential equations, Adv. Difference Equ., 2012 (2012), 1-7.  doi: 10.1186/1687-1847-2012-52.  Google Scholar

Figure 1.  The BBP decomposition for $(NP)^{T,y_0}$
Figure Options

Download full-size image

Download as PowerPoint slide

Figure 2.  The BBP decomposition for $(TP)^{M,y_0}$
Figure Options

Download full-size image

Download as PowerPoint slide

[1]

M. S. Lee, H. G. Harno, B. S. Goh, K. H. Lim. On the bang-bang control approach via a component-wise line search strategy for unconstrained optimization. Numerical Algebra, Control & Optimization, 2021, 11 (1) : 45-61. doi: 10.3934/naco.2020014
[2]

Vivina Barutello, Gian Marco Canneori, Susanna Terracini. Minimal collision arcs asymptotic to central configurations. Discrete & Continuous Dynamical Systems - A, 2021, 41 (1) : 61-86. doi: 10.3934/dcds.2020218
[3]

Dan Zhu, Rosemary A. Renaut, Hongwei Li, Tianyou Liu. Fast non-convex low-rank matrix decomposition for separation of potential field data using minimal memory. Inverse Problems & Imaging, , () : -. doi: 10.3934/ipi.2020076
[4]

Awais Younus, Zoubia Dastgeer, Nudrat Ishaq, Abdul Ghaffar, Kottakkaran Sooppy Nisar, Devendra Kumar. On the observability of conformable linear time-invariant control systems. Discrete & Continuous Dynamical Systems - S, 2020  doi: 10.3934/dcdss.2020444
[5]

Nicolas Rougerie. On two properties of the Fisher information. Kinetic & Related Models, , () : -. doi: 10.3934/krm.2020049
[6]

Huiying Fan, Tao Ma. Parabolic equations involving Laguerre operators and weighted mixed-norm estimates. Communications on Pure & Applied Analysis, 2020, 19 (12) : 5487-5508. doi: 10.3934/cpaa.2020249
[7]

Pengyu Chen. Non-autonomous stochastic evolution equations with nonlinear noise and nonlocal conditions governed by noncompact evolution families. Discrete & Continuous Dynamical Systems - A, 2020  doi: 10.3934/dcds.2020383
[8]

Andreu Ferré Moragues. Properties of multicorrelation sequences and large returns under some ergodicity assumptions. Discrete & Continuous Dynamical Systems - A, 2020  doi: 10.3934/dcds.2020386
[9]

Christian Beck, Lukas Gonon, Martin Hutzenthaler, Arnulf Jentzen. On existence and uniqueness properties for solutions of stochastic fixed point equations. Discrete & Continuous Dynamical Systems - B, 2020  doi: 10.3934/dcdsb.2020320
[10]

Sumit Arora, Manil T. Mohan, Jaydev Dabas. Approximate controllability of a Sobolev type impulsive functional evolution system in Banach spaces. Mathematical Control & Related Fields, 2020  doi: 10.3934/mcrf.2020049
[11]

Anna Canale, Francesco Pappalardo, Ciro Tarantino. Weighted multipolar Hardy inequalities and evolution problems with Kolmogorov operators perturbed by singular potentials. Communications on Pure & Applied Analysis, , () : -. doi: 10.3934/cpaa.2020274
[12]

Peizhao Yu, Guoshan Zhang, Yi Zhang. Decoupling of cubic polynomial matrix systems. Numerical Algebra, Control & Optimization, 2021, 11 (1) : 13-26. doi: 10.3934/naco.2020012
[13]

Lars Grüne, Matthias A. Müller, Christopher M. Kellett, Steven R. Weller. Strict dissipativity for discrete time discounted optimal control problems. Mathematical Control & Related Fields, 2020  doi: 10.3934/mcrf.2020046
[14]

Serena Dipierro, Benedetta Pellacci, Enrico Valdinoci, Gianmaria Verzini. Time-fractional equations with reaction terms: Fundamental solutions and asymptotics. Discrete & Continuous Dynamical Systems - A, 2021, 41 (1) : 257-275. doi: 10.3934/dcds.2020137
[15]

Guido Cavallaro, Roberto Garra, Carlo Marchioro. Long time localization of modified surface quasi-geostrophic equations. Discrete & Continuous Dynamical Systems - B, 2020  doi: 10.3934/dcdsb.2020336
[16]

Cuicui Li, Lin Zhou, Zhidong Teng, Buyu Wen. The threshold dynamics of a discrete-time echinococcosis transmission model. Discrete & Continuous Dynamical Systems - B, 2020  doi: 10.3934/dcdsb.2020339
[17]

Ilyasse Lamrani, Imad El Harraki, Ali Boutoulout, Fatima-Zahrae El Alaoui. Feedback stabilization of bilinear coupled hyperbolic systems. Discrete & Continuous Dynamical Systems - S, 2020  doi: 10.3934/dcdss.2020434
[18]

Felix Finster, Jürg Fröhlich, Marco Oppio, Claudio F. Paganini. Causal fermion systems and the ETH approach to quantum theory. Discrete & Continuous Dynamical Systems - S, 2020  doi: 10.3934/dcdss.2020451
[19]

Xiyou Cheng, Zhitao Zhang. Structure of positive solutions to a class of Schrödinger systems. Discrete & Continuous Dynamical Systems - S, 2020  doi: 10.3934/dcdss.2020461
[20]

Yuri Fedorov, Božidar Jovanović. Continuous and discrete Neumann systems on Stiefel varieties as matrix generalizations of the Jacobi–Mumford systems. Discrete & Continuous Dynamical Systems - A, 2020  doi: 10.3934/dcds.2020375

2019 Impact Factor: 0.857

Tools

Metrics

  • PDF downloads (62)
  • HTML views (53)
  • Cited by (12)

Other articles
by authors

[Back to Top]

Copyright © 2020 American Institute of Mathematical Sciences