For a general bandedmatrix, discuss the sparsity pattern of the Q and R matrices from the QR decomposition of symmetric and non-symmetric tridiagonal matrices.
对于一般的带状矩阵，详述对对称与非对称三对角化矩阵做QR分解后，Q矩阵与R矩阵的稀疏元素分布型态。
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Strang s analysis applies to so-called banded matrices. Most of the Numbers in a bandedmatrix are zeroes; the only exceptions fall along diagonal bands, at or near the central diagonal of the matrix.
The four kinds of method for symmetrization of the nonsymmetric and no. bandedmatrix equations of the mixed element and the associated approximate methods for analysis of some fluid-solid coupled d…