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August  2014, 19(6): 1507-1522. doi: 10.3934/dcdsb.2014.19.1507

Traveling wave in backward and forward parabolic equations from population dynamics

Lianzhang Bao 1, and  Zhengfang Zhou 2,

1. 

College of Mathematics, Jilin University, Changchun, Jilin 130012, China
2. 

Department of Mathematics, Michigan State University, East Lansing, MI 48824

Received  October 2013 Revised  February 2014 Published  June 2014

This work is concerned with the properties of the traveling wave of the backward and forward parabolic equation \begin{equation*} u_t= [ D(u)u_x]_x + g(u),\quad t\geq 0, x\in \mathbb{R}, \end{equation*} where $D(u)$ changes its sign once, from negative to positive value, in the interval $u\in [0,1]$ and $g(u)$ is a mono-stable nonlinear reaction term. The existence of infinitely many traveling wave solutions is proven. These traveling waves are parameterized by their wave speed and monotonically connect the stationary states $u\equiv0$ and $u\equiv 1$.
Keywords: Aggregation diffusion processes, population dynamics, traveling wave solution..
Mathematics Subject Classification: Primary: 35K57, 92D25; Secondary: 34B1.
Citation: Lianzhang Bao, Zhengfang Zhou. Traveling wave in backward and forward parabolic equations from population dynamics. Discrete & Continuous Dynamical Systems - B, 2014, 19 (6) : 1507-1522. doi: 10.3934/dcdsb.2014.19.1507
References:
[1]

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show all references

References:
[1]

H. Berestycki, G. Nadin, B. Perthame and L. Ryzhik, The non-local Fisher-KPP equation: Traveling waves and steady states,, Nonlinearity, 22 (2009), 2813.  doi: 10.1088/0951-7715/22/12/002.  Google Scholar

[2]

L. Ferracuti, C. Marcelli and F. Papalini, Travelling waves in some reaction-diffusion-aggregation models,, Advances in Dynamical Systems and Applications, 4 (2009), 19.   Google Scholar

[3]

R. A. Fisher, The wave of advance of advantageous genes,, Ann. Eugen, 7 (1937), 355.  doi: 10.1111/j.1469-1809.1937.tb02153.x.  Google Scholar

[4]

F. S. Garduño and P. K. Maini, Existence and uniqueness of a sharp travelling wave in degenerate non-linear diffusion Fisher-KPP equations,, J. Math. Biol., 33 (1994), 163.  doi: 10.1007/BF00160178.  Google Scholar

[5]

F. S. Garduño and P. K. Maini, Travelling wave phenomena in some degenerate reaction-diffusion equations,, J. Differential Equation, 117 (1995), 281.  doi: 10.1006/jdeq.1995.1055.  Google Scholar

[6]

F. S. Garduño, P. K. Maini and J. Pérez-Velázquez, A non-linear degenerate equation for direct aggregation and taravelling wave dynamics,, Discrete and Continuous Dynamical Systerms Series B, 13 (2010), 455.  doi: 10.3934/dcdsb.2010.13.455.  Google Scholar

[7]

K. P. Hadeler, Travelling fronts and free boundary value problems，, In Albretch, (1981).   Google Scholar

[8]

D. Horstmann, K. J. Painter and H. G. Othmer, Aggregation under local reinforcement: From lattice to continuum,, Euro. Jnl of Applied Mathematics, 15 (2004), 546.  doi: 10.1017/S0956792504005571.  Google Scholar

[9]

A. Kolmogorov, I. Petrovsky and I. N. Piskounov, Study of the diffusion equation with growth of the quantity of matter and its applications to a biological problem，, (English translation containing the relvent results) In OLiveira-Pinto, (1982).   Google Scholar

[10]

M. Kuzmin and S. Ruggerini, Front Propagation in Diffusion-Aggregation Models with Bi-Stable Reaction,, Discrete and Continuous Dynamical Systems Series B, 16 (2011), 819.  doi: 10.3934/dcdsb.2011.16.819.  Google Scholar

[11]

T. Laurent, Local and global existence for an aggregation equation,, Comm. Partial Diff. Eqns., 32 (2007), 1941.  doi: 10.1080/03605300701318955.  Google Scholar

[12]

D. Li and X. Zhang, On a nonlocal aggregation model with nolinear diffusion,, Discrete and Continuous Dynamical Systems, 27 (2010), 301.  doi: 10.3934/dcds.2010.27.301.  Google Scholar

[13]

P. K. Maini, L. Malaguti, C. Marcelli and S. Matucci, Diffusion-aggregation processes with mono-stable reaction terms,, Discrete and Continuous Dynamical Systerms Series B, 6 (2006), 1175.  doi: 10.3934/dcdsb.2006.6.1175.  Google Scholar

[14]

L. Malaguti and C. Marcelli, Travelling wavefronts in reaction-diffusion equations with convection effects and non-regular terms,, Math. Nachr., 242 (2002), 148.  doi: 10.1002/1522-2616(200207)242:1<148::AID-MANA148>3.0.CO;2-J.  Google Scholar

[15]

L. Malaguti and C. Marcelli, Sharp profiles in degenerate and doubly degenerate Fisher-KPP equations,, J. Differential Equation, 195 (2003), 471.  doi: 10.1016/j.jde.2003.06.005.  Google Scholar

[16]

V. Padrón, Sobolev regularization of a nonlinear ill-posed parabolic problem as a model for aggregating populations,, Comm. Partial Diff. Eqns., 23 (1998), 457.  doi: 10.1080/03605309808821353.  Google Scholar

[17]

J. G. Skellam, Random dispersal in theoretical populations,, Biometrika, 38 (1951), 196.  doi: 10.1093/biomet/38.1-2.196.  Google Scholar

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