## Advances in Differential Equations

- Adv. Differential Equations
- Volume 21, Number 3/4 (2016), 301-332.

### Global well-posedness and singularity propagation for the BBM-BBM system on a quarter plane

Jerry L. Bona, Hongqiu Chen, and Chun-Hsiung Hsia

#### Abstract

Nonlinear, dispersive wave equations arise as models of various physical phenomena. A major preoccupation on the mathematical side of the study of such equations has been to settle the fundamental issues of local and global well-posedness in Hadamard's classical sense. The development so far has been mostly for the initial-value problem for single equations.

However, systems of such equations have also received consideration, and there is now theory for pure initial-value problems where data are given on the entire space or on the torus. Here, consideration is given to non-homogeneous initial-boundary-value problems for a class of BBM-type systems having the form \begin{equation*} \begin{aligned} u_t + u_x -u_{xxt} + P(u,v)_x \, = \, 0, \\ v_t + v_x - v_{xxt} + Q(u,v)_x \, = \, 0, \end{aligned} \end{equation*} where $P$ and $Q$ are homogeneous, quadratic polynomials, $u$ and $v$ are real-valued functions of a spatial variable $x$ and a temporal variable $t$, and subscripts connote partial differentiation. Local in time well-posedness is established in the quarter plane $\{(x,t): x \geq 0, \, t \geq 0 \}$. Under certain restrictions on the coefficients of the nonlinearities $P$ and $Q$, global well posedness is also shown to obtain.

#### Article information

**Source**

Adv. Differential Equations Volume 21, Number 3/4 (2016), 301-332.

**Dates**

First available in Project Euclid: 18 February 2016

**Permanent link to this document**

https://projecteuclid.org/euclid.ade/1455805260

**Mathematical Reviews number (MathSciNet)**

MR3461296

**Zentralblatt MATH identifier**

06550104

**Subjects**

Primary: 35Q35: PDEs in connection with fluid mechanics 35M33: Initial-boundary value problems for systems of mixed type 45G15: Systems of nonlinear integral equations 76B03: Existence, uniqueness, and regularity theory [See also 35Q35] 35Q51: Soliton-like equations [See also 37K40] 35Q53: KdV-like equations (Korteweg-de Vries) [See also 37K10] 76B15: Water waves, gravity waves; dispersion and scattering, nonlinear interaction [See also 35Q30] 76B25: Solitary waves [See also 35C11] 76B55: Internal waves

#### Citation

Bona, Jerry L.; Chen, Hongqiu; Hsia, Chun-Hsiung. Global well-posedness and singularity propagation for the BBM-BBM system on a quarter plane. Adv. Differential Equations 21 (2016), no. 3/4, 301--332. https://projecteuclid.org/euclid.ade/1455805260.