# American Institute of Mathematical Sciences

June  2016, 21(4): 1203-1223. doi: 10.3934/dcdsb.2016.21.1203

## A modified proof of pullback attractors in a Sobolev space for stochastic FitzHugh-Nagumo equations

 1 School of Mathematics and Statistics, Southwest University, Chongqing 400715, China, China

Received  June 2015 Published  March 2016

A bi-spatial pullback attractor is obtained for non-autonomous and stochastic FitzHugh-Nagumo equations when the initial space is $L^2(\mathbb{R}^n)^2$ and the terminate space is $H^1(\mathbb{R}^n)\times L^2(\mathbb{R}^n)$. Some new techniques of positive and negative truncations are used to investigate the regularity of attractors for coupling equations and to correct the essential mistake in [T. Q. Bao, Discrete Cont. Dyn. Syst. 35(2015), 441-466]. A counterexample is given for an important lemma for $H^1$-attractor in several literatures included above.
Citation: Yangrong Li, Jinyan Yin. A modified proof of pullback attractors in a Sobolev space for stochastic FitzHugh-Nagumo equations. Discrete & Continuous Dynamical Systems - B, 2016, 21 (4) : 1203-1223. doi: 10.3934/dcdsb.2016.21.1203
##### References:
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Sun, The existence of global attractors for the norm-to-weak continuous semigroup and application to the nonlinear reaction-diffusion equations,, J. Differ. Equ., 223 (2006), 367. doi: 10.1016/j.jde.2005.06.008. Google Scholar

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##### References:
 [1] A. Adili and B. Wang, Random attractors for stochastic FitzHugh-Nagumo systems driven by deterministic non-autonomous forcing,, Discrete Contin. Dyn. Syst. Series B, 18 (2013), 643. doi: 10.3934/dcdsb.2013.18.643. Google Scholar [2] A. Adili and B. Wang, Random attractors for non-autonomous stochastic FitzHugh-Nagumo systems with multiplicative noise,, Discrete Contin. Dyn. Syst., (2013), 1. doi: 10.3934/proc.2013.2013.1. Google Scholar [3] C. T. Anh, T. Q. Bao and N. V. Thanh, Regularity of random attractors for stochastic semilinear degenerate parabolic equations,, Electric J. Differ. Equ., 207 (2012), 1. Google Scholar [4] L. Arnold, Random Dynamical Systems,, Springer-Verlag, (1998). doi: 10.1007/978-3-662-12878-7. Google Scholar [5] T. Q. Bao, Regularity of pullback random attractors for stochastic FitzHugh-Nagumo system on unbounded domains,, Disrete Contin. Dyn. Syst., 35 (2015), 441. doi: 10.3934/dcds.2015.35.441. Google Scholar [6] P. W. Bates, K. Lu and B. X. Wang, Random attractors for stochastic reaction-diffusion equations on unbounded domains,, J. Differ. Equ., 246 (2009), 845. doi: 10.1016/j.jde.2008.05.017. Google Scholar [7] Z. Brzezniak, T. Caraballo, J. A. Langa, Y. Li, G. Lukaszewiczd and J. Real, Random attractors for stochastic 2D-Navier-Stokes equations in some unbounded domains,, J. Differ. Equ., 255 (2013), 3897. doi: 10.1016/j.jde.2013.07.043. Google Scholar [8] T. Caraballo and J. A. Langa, Stability and random attractors for a reaction-diffusion equation with multiplicative noise,, Disrete Contin. Dyn. Syst., 6 (2000), 875. doi: 10.3934/dcds.2000.6.875. Google Scholar [9] A. N. Carvalho, J. A. Langa and J. C. Robinson, Attractor for Infinite-dimensional Nonautonomous Dynamical Systems,, Appl. Math. Sciences, (2013). doi: 10.1007/978-1-4614-4581-4. Google Scholar [10] B. Gess, Random attractors for stochastic porous media equations perturbed by space-time linear multiplicative noise,, Annals Probability, 42 (2014), 818. doi: 10.1214/13-AOP869. Google Scholar [11] B. Gess, Random attractors for degenerate stochastic partial differential equations,, J. Dyn. Differ. Equ., 25 (2013), 121. doi: 10.1007/s10884-013-9294-5. Google Scholar [12] J. Huang, The random attractor of stochastic FitzHugh-Nagumo equations in an infinite lattice with white noises,, Physica D, 233 (2007), 83. doi: 10.1016/j.physd.2007.06.008. Google Scholar [13] A. K. Khanmamedov, Global attractors for one dimensional p-Laplacian equation,, Nonlinear Anal., 71 (2009), 155. doi: 10.1016/j.na.2008.10.037. Google Scholar [14] A. Krause and B. X. Wang, Pullback attractors of non-autonomous stochastic degenerate parabolic equations on unbounded domains,, J. Math. Anal. Appl., 417 (2014), 1018. doi: 10.1016/j.jmaa.2014.03.037. Google Scholar [15] J. Li, Y.R. Li, B. Wang, Random attractors of reaction-diffusion equations with multiplicative noise in $L^p$,, App. Math. Comp., 215 (2010), 3399. doi: 10.1016/j.amc.2009.10.033. Google Scholar [16] Y. R. Li, H. Y. Cui and J. Li, Upper semi-continuity and regularity of random attractors on p-times integrable spaces and applications,, Nonlinear Anal., 109 (2014), 33. doi: 10.1016/j.na.2014.06.013. Google Scholar [17] Y. R. Li, A. H. Gu and J. Li, Existence and continuity of bi-spatial random attractors and application to stochastic semilinear Laplacian equations,, J. Differ. Equ., 258 (2015), 504. doi: 10.1016/j.jde.2014.09.021. Google Scholar [18] Y. R. Li and B. L. Guo, Random attractors for quasi-continuous random dynamical systems and applications to stochastic reaction-diffusion equations,, J. Differ. Equ., 245 (2008), 1775. doi: 10.1016/j.jde.2008.06.031. Google Scholar [19] G. Lukaszewicz, On pullback attractors in $L^p$ for nonautonomous reaction-diffusion equations,, Nonlinear Anal., 73 (2010), 350. doi: 10.1016/j.na.2010.03.023. Google Scholar [20] G. Lukaszewicz, On pullback attractors in $H^1_0$ for nonautonomous reaction-diffusion equations,, International J. Bifurcation and Chaos, 20 (2010), 2637. doi: 10.1142/S0218127410027258. Google Scholar [21] H. T. Song, Pullback attractors of non-autonomous reaction-diffusion equations in $H^1_0$,, J. Differ. Equ., 249 (2010), 2357. doi: 10.1016/j.jde.2010.07.034. Google Scholar [22] B. X. Wang, Sufficient and necessary criteria for existence of pullback attractors for non-compact random dynamical systems,, J. Differ. Equ., 253 (2012), 1544. doi: 10.1016/j.jde.2012.05.015. Google Scholar [23] B. X. Wang, Random attractors for non-autonomous stochastic wave equations with multiplicative noise,, Disrete Continu. Dyn. Syst., 34 (2014), 269. doi: 10.3934/dcds.2014.34.269. Google Scholar [24] B. X. Wang, Asymptotic behavior of stochastic wave equations with critical exponents on $\mathbbR^3$,, Tran. Am. Math. Soc., 363 (2011), 3639. doi: 10.1090/S0002-9947-2011-05247-5. Google Scholar [25] B. X. Wang, Pullback attractors for non-autonomous reaction-diffusion equations on $\mathbbR^n$,, Front. Math. China, 4 (2009), 563. doi: 10.1007/s11464-009-0033-5. Google Scholar [26] E. V. Vleck and B. Wang, Attractors for lattice FitzHugh-Nagumo systems,, Physica D, 212 (2005), 317. doi: 10.1016/j.physd.2005.10.006. Google Scholar [27] B. Wang, Random attractors for the stochastic FitzHugh-Nagumo system on unbounded domains,, Nonlinear Anal. TMA, 71 (2009), 2811. doi: 10.1016/j.na.2009.01.131. Google Scholar [28] B. Wang, Pullback attractors for the non-autonomous FitzHugh-Nagumo system on unbounded domains,, Nonlinear Anal. TMA, 70 (2009), 3799. doi: 10.1016/j.na.2008.07.011. Google Scholar [29] G. Wang and Y. B. Tang, $(L^2,H^1)$-Random attractors for stochastic reaction-diffusion equation on unbounded domains,, Abstr. App. Anal., (2013). doi: 10.1155/279509. Google Scholar [30] Y. H. Wang and C. K. Zhong, On the existence of pullback attractors for non-autonomous reaction-diffusion equations,, Dyn. Syst., 23 (2008), 1. doi: 10.1080/14689360701611821. Google Scholar [31] J. Y. Yin, Y. R. Li and H. J. Zhao, Random attractors for stochastic semi-linear degenerate parabolic equations with additive noise in $L^q$,, Appl. Math. Comput., 225 (2013), 526. doi: 10.1016/j.amc.2013.09.051. Google Scholar [32] W. Q. Zhao, $H^1$-random attractors for stochastic reaction-diffusion equations with additive noise,, Nonlinear Anal., 84 (2013), 61. doi: 10.1016/j.na.2013.01.014. Google Scholar [33] W. Q. Zhao, $H^1$-random attractors and random equilibria for stochastic reaction-diffusion equations with multiplicative noises,, Commun Nonlinear Sci Numer Simulat, 18 (2013), 2707. doi: 10.1016/j.cnsns.2013.03.012. Google Scholar [34] W. Q. Zhao, Regularity of random attractors for a degenerate parabolic equations driven by additive noise,, Appl. Math. Comput., 239 (2014), 358. doi: 10.1016/j.amc.2014.04.106. Google Scholar [35] W. Q. Zhao and Y. R. Li, ($L^2$, $L^p$)-random attractors for stochastic reaction-diffusion equation on unbounded domains,, Nonlinear Anal., 75 (2012), 485. doi: 10.1016/j.na.2011.08.050. Google Scholar [36] W. Q. Zhao and Y. R. Li, Random attractors for stochastic semi-linear degenerate parabolic equations with additive noises,, Dyn. Partial Diff. Equ., 11 (2014), 269. doi: 10.4310/DPDE.2014.v11.n3.a4. Google Scholar [37] C. K. Zhong, M. H. Yang and C. Y. Sun, The existence of global attractors for the norm-to-weak continuous semigroup and application to the nonlinear reaction-diffusion equations,, J. Differ. Equ., 223 (2006), 367. doi: 10.1016/j.jde.2005.06.008. Google Scholar
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