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arXiv 1703.05151math.AP
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$(p, q)$ -Laplacian驱动的反应扩散方程的单调波前

Monotone wave fronts for $(p, q)$-Laplacian driven reaction-diffusion equations

Maurizio Garrione, Marta Strani

摘要:

研究了一类$1$维反应扩散方程$$ u_t = (| u_x |^{p-2} u_x + | u_x |^{q-2} u_x)_x + f(u), $$的单调异宿行波解的存在性,其中右边的非齐次算子为$(p, q)$ -Laplacian算子.这里我们假设$2 \leq q < p$和$f$是Fisher型的非线性,即它在其零点之外总是正的。我们给出了一个估计的临界速度,我们评论的作用,$p$和$q$的动力学,提供一些数值模拟。

英文摘要:

We study the existence of monotone heteroclinic traveling waves for the $1$-dimensional reaction-diffusion equation $$ u_t = (| u_x |^{p-2} u_x + | u_x |^{q-2} u_x)_x + f(u), $$ where the non-homogeneous operator appearing on the right-hand side is known as $(p, q)$-Laplacian. Here we assume that $2 \leq q < p$ and $f$ is a nonlinearity of Fisher type, namely it is always positive out of its zeros. We give an estimate of the critical speed and we comment on the roles of $p$ and $q$ in the dynamics, providing some numerical simulations.

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