针对两点混合边值问题提出了基于三次混合插值的超收敛有限体积元方法,该方法形成的线性代数方程组具有五对角性质,可以使用带状消去法求解.证明了格式按照离散日。半范数具有四阶收敛精度.最后,通过数值算例验证了结论的正确性.
A superconvergent finite volume element method for mixed two point boundary value problems based on mixed cubic interpolations is presented. The linear algebraic system derived by the scheme has pentadiagonal property and can be solved by band elimination method. It is proved that the given scheme is convergent with fourth-order accuracy according to HI discrete seminorm. Finally a numerical example is given to show the correctness of theoretical analysis of the scheme.