In this paper, We developed a select main element iterative method. For a class linear system of divergence discussed convergence, and illustrate by examples.

本文提出了一种选主元迭代法。对一类发散的线性系统讨论了其收敛性，并举例说明之。

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In this paper, the pointwise convergence and divergence of a class of generalized Fourier series generated by piecewise linear spectral sequences are studied.

研究由分段线性谱序列生成的广义傅里叶级数的逐点敛散性。

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