讨论了一类块三对角矩阵的求逆问题。
The inverse of a class of block tridiagonal matrices is investigated.
该算法比已有的块三对角矩阵求逆算法的计算复杂度和计算时间低。
The computing complexity and computing time of this algorithm is lower than that of existed algorithms.
由块三对角矩阵的LU分解，得到了其逆矩阵块元素的显式表达式。
With the LU decomposition of the block tridiagonal matrix, an explicit expression of the block inverse elements is obtained.
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