**PUBLISHED
PAPERS **

**C. Pignotti and I. Reche Vallejo,**"Flocking estimates for the Cucker-Smale model with time lag and ierarchical leadership",

Journal of Mathematical Analysis and Applications, Vol. 464 (2018), pp. 1313-1332. link**S. Nicaise and C. Pignotti,**"Well-posedness and stability results for nonlinear abstract evolution equations with time delays",

Journal of Evolution Equations (2018), DOI 10.1007/s00028-018-0427-5, published online.**C. Pignotti,**"Stability results for abstract evolution equations with intermittent time-delay feedback'',

In*Solvability, Regularity, and Optimal Control of Boundary Value Problems for PDEs*, Springer Indam Series, Vol. 22 (2017), pp. 469-487.**S. Nicaise and C. Pignotti,**"A note on the asymptotic stability of wave-type equations with switching time-delay",

In*Evolution Equations-Long Time behavior and Control*, London Mathematical Society Lecture Note Series Vol. 439 (2017)*,*pp. 137-150, Cambridge University Press.**C. Pignotti,**

"Stability results for second-order evolution equations with memory and switching time-delay"*Journal of Dynamics and Differential Equations,*Vol. 29 (2017),*pp. 1309-1324.*.**G. Fusco, F. Leonetti and C. Pignotti,**

"On the asymptotic behavior of symmetric solutions of the Allen-Cahn equation in unbounded domains in R^2",*Discrete and Continuous Dynamical Systems-A,*Vol. 37 (2017), pp. 725-742.**G. Fragnelli and C. Pignotti,**

"Stability of solutions to nonlinear wave equations with switching time-delay"*Dynamics of Partial Differential Equations,*Vol. 13 (2016), pp. 31-51.**S. Nicaise and C. Pignotti,**

"Stability of the wave equation with localized Kelvin-Voigt damping and boundary delay feedback"*Discrete and Continuous Dynamical Systems-S,*Vol. 9 (2016), pp. 791-813.**K. Ammari, S. Nicaise and C. Pignotti,**

"Stability of abstract-wave equation with delay and a Kelvin-Voigt damping"*Asymptotic Analysis,*Vol. 95 (2015), pp. 21-38.**S. Nicaise and C. Pignotti,**

"Exponential stability of abstract evolution equations with time delay"*Journal of Evolution Equations,*Vol. 15 (2015), pp. 107-129.**F. Alabau-Boussouira, S. Nicaise and C. Pignotti,**

"Exponential stability of the wave equation with memory and time delay"*New Prospects in Direct, Inverse and Control Problems for Evolution Equations,*Springer Indam Series, Vol. 10 (2014), pp. 1-22.**S. Nicaise and C. Pignotti,**

"Stability results for second-order evolution equations with switching time-delay",*Journal of Dynamics and Differential Equations,*Vol. 26 (2014), pp. 781-803.**S. Nicaise and C. Pignotti,**

"Stabilization of second-order evolution equations with time delay",*Mathematics of Control, Signals and Systems,*Vol. 26 (2014), pp. 563-588.**K. Ammari, S. Nicaise and C. Pignotti,**

"Stabilization by switching time-delay",*Asymptotic Analysis,*Vol. 83 (2013), pp. 263-283.**S. Nicaise and C. Pignotti,**

"Asymptotic stability of second- order evolution equations with intermittent delay"*Advances in Differential Equations,*Vol. 17 (2012), pp. 879-902.**C. Pignotti,**

"A note on stabilization of locally damped wave equations with time delay",*Systems & Control Letters,*Vol. 61 (2012), pp. 92-97.**S. Nicaise and C. Pignotti,**

"Exponential stability of second order evolution equations with structural damping and dynamic boundary delay feedback",*IMA Journal of Mathematical Control and Information,*Vol. 28 (2011), pp. 417-446.**S. Nicaise and C. Pignotti,**

"Interior feedback stabilization of wave equations with time dependent delay",*Electronic Journal of Differential Equations,*Vol. 2011 (2011), n. 41, pp. 1-20.**G. Fusco, F. Leonetti and C. Pignotti,**

"A uniform estimate for positive solutions of semilinear elliptic equations",*Transactions of American Mathematical Society,*Vol. 363 (2011), pp. 4285-4307.**S. Nicaise, C. Pignotti and J. Valein,**

"Exponential stability of the wave equation with boundary time-varying delay ",*Discrete and Continuous Dynamical Systems-S,*Vol. 4 (2011), n. 3, pp. 693-722.**K. Ammari, S. Nicaise and C. Pignotti,**

"Feedback boundary stabilization of wave equations with interior delay ",*Systems & Control Letters,*Vol. 59 (2010), pp. 623-628.**S. Nicaise and C. Pignotti,**

"Asymptotic analysis of a simple model of fluid-structure interaction",*Networks and Heterogeneous Media,*Vol. 3 (2008), n. 4, pp. 787-813.**S. Nicaise and C. Pignotti,**

"Stabilization of the wave equation with boundary or internal distributed delay",*Differential and Integral Equations,*Vol. 21 (2008), n. 9-10, pp. 935-958.**G. Fusco and C. Pignotti,**

"Estimates for fundamental solutions and spectral bounds for a class of Schrodinger operators",*Journal of Differential Equations,*Vol. 244 (2008), n. 3, pp. 514-554.**G. Freni, F. Gozzi and C. Pignotti,**

"Optimal strategies in linear multisector models: Value function and optimality conditions",*Journal of Mathematical Economics,*Vol. 44 (2008), n. 1, pp. 55-86.**S. Nicaise and C. Pignotti,**

"Exponential and Polynomial Stability Estimates for the Wave Equation and Maxwell's System with Memory Boundary Conditions",*Functional Analysis and Evolution Equations.*The Gunter Lumer Volume (2008), pp. 515-530, Birkhauser Verlag.**S. Nicaise and C. Pignotti,**

"Energy decay rates for solutions of Maxwell's system with a memory boundary condition",*Collectanea Mathematica,*Vol. 58 (2007), n. 3, pp. 327-342.**S. Nicaise and C. Pignotti,**

"Partially delayed stabilizing feedbacks for Maxwell's system" ,*Advances in Differential Equations,*Vol. 12 (2007), n. 1, pp. 27-54.**S. Nicaise and C. Pignotti,**

"Stabilization of the wave equation with variable coefficients and boundary condition of memory type",*Asymptotic Analysis,*Vol. 50 (2006), n. 1-2, pp. 31-67.**S. Nicaise and C. Pignotti,**

"Stability and instability results of the wave equation with a delay term in the boundary or internal feedbacks",*SIAM Journal on Control and Optimization,*Vol. 45 (2006), n. 5, pp. 1561-1585.**S. Nicaise and C. Pignotti,**

"Internal and boundary observability estimates for heterogeneous Maxwell's system",*Applied Mathematics and Optimization,*Vol. 54 (2006), n. 1, pp. 47-70.**S. Nicaise and C. Pignotti,**

"Internal stabilization of Maxwell's equations in heterogeneous media",*Abstract and Applied Analysis,*Vol. 2005 (2005), n. 7, pp. 791-811.**C. Pignotti,**

"Semiconcavity results for constrained optimal control problems in a half-space",*Journal of Mathematical Analysis and Applications,*Vol. 305 (2005), n. 1, pp. 197-218.**F. Camilli and C. Pignotti,**

"A relaxation result for a class of degenerate Hamilton-Jacobi equations",*Differential and Integral Equations,*Vol. 18 (2005), n. 4, pp. 419-430.**S. Nicaise and C. Pignotti,**

"Boundary stabilization of Maxwell's Equations with space-time variable coefficients",*ESAIM Control Optimisation and Calculus of Variations,*Vol. 9 (2003), pp. 563-578.**C. Pignotti,**

"Rectifiability results for singular and conjugate points of optimal exit time problems",*Journal of Mathematical Analysis and Applications,*Vol. 270 (2002), n. 2, pp. 681-708.**C. Pignotti,**

"Problemi di controllo ottimo con tempi di uscita: semiconcavita' e applicazioni",*Bollettino UMI,*Serie VIII, Vol. IV-A (2001), pp. 531-534.

(abstract della Tesi di Dottorato)**P. Cannarsa and C. Pignotti,**

"Semiconcavity of the value function for an exit time problem with degenerate cost",*Le Matematiche,*Vol. 55 - Suppl. 2 (2000), pp. 71-108.**P. Cannarsa, C. Pignotti and C. Sinestrari,**

"Semiconcavity for Optimal Control Problems with Exit Time",*Discrete and Continuous Dynamical Systems,*Vol. 6 (2000), n. 4, pp. 975-997.**C. Pignotti,**

"Observability and controllability of Maxwell's equations",*Rendiconti di Matematica e Applicazioni,*serie VII, Vol. 19 (1999), n. 4, pp. 523-546.**P. Cannarsa and C. Pignotti,**

"Optimal control with state constraints: a semiconcavity result",

in*"Proceedings of the 38th Conference on Decision and Control", IEEE,*New York (1999), pp. 436-441.**L. Fatone, C. Pignotti, M. C. Recchioni and F. Zirilli,**

"Time harmonic electromagnetic scattering from a bounded obstacle: an existence theorem and a computational method",*Journal of Mathematical Physics,*Vol.40 (1999), n. 10, pp. 4859-4887.**L. Fatone, P. Maponi, C. Pignotti and F. Zirilli,**

"An Inverse Problem for the Two-Dimensional Wave Equation in a Stratified Medium",

in*"Inverse Problems of Wave Propagation and Diffraction", Lecture Notes in Physics, Springer,*Berlin, Vol.486 (1997), pp. 263-274.**PREPRINT**

**C. Pignotti and E. Trélat,**

"Convergence to consensus of the general finite-dimensional Cucker-Smale model with time-varying delays",

preprint 2017,*ArXiv:1707.05020.***C. Pignotti and I. Reche Vallejo,**“Asymptotic analysis of a Cucker-Smale system with leadership and distributed delay”, preprint 2018.