
The parabolic partial difference equation is considered which is nonlinear and of neutral type \[ \triangle_2(y_{m,n} - p_ny_{m,n-r}) + \sum_{i\in{\mathcal I}}q^{(i)}_{m,n}f(y_{m,n-\sigma_i}) = r_n\nabla^2y_{m-1,n+1} + \sum_{j\in{\mathcal J}}R_{j,n}\nabla^2y_{m-1,n+1-\gamma_j} \] with \({\mathcal I}, {\mathcal J}\) two sets of indices, \(\{y_{m,n}\} = \{y_{m_1,m_2,\dots,m_l,n}\}\), \(\nabla^2\) is the discrete Laplacian operator and \(\triangle_i^2\) is a partial difference operator of order 2; \(i\) denotes the argument with respect to which the difference is performed. Two kinds of boundary conditions are considered \[ \triangle_Ny_{m-1,n} = 0,\quad\text{on }\partial\Omega\times{\mathbb N}_{n_0} \] and \[ \triangle_Ny_{m-1,n} + g_{m,n}y_{m,n} = 0,\quad \text{on }\partial\Omega\times{\mathbb N}_{n_0} \] \(\Omega\) being the set of the ``space'' arguments denoted by \(\{m_1,\dots,m_l\}\) and \(\triangle_N\) the normal difference on the boundary of \(\Omega\). The author proves oscillation conditions for the solutions of the two boundary value problems.
Stability of difference equations, boundary value problems, parabolic neutral delay difference equation, Partial functional-differential equations, Discrete version of topics in analysis, oscillation
Stability of difference equations, boundary value problems, parabolic neutral delay difference equation, Partial functional-differential equations, Discrete version of topics in analysis, oscillation
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