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北京石油化工学院2026年研究生招生接收调剂公告
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[交流] 【求助】Fast_diag 参数设置对计算结果的影响?

请问各位,Fast_diag 这个参数设置,对计算速度有什么影响?
其中,MS 帮助手册提供了一种最快的算法,对于有些体系,有收敛性问题,不知道谁测试过,哪些体系面临收敛性问题?
Setting the values to 0 0 specifies the Lapack 2.0 zheev and dsyev routines. These are the slowest but most reliable diagonalization techniques.

Setting the value to 1 1 specifies the Lapack 3.0 zheevd and dsyevd routines, which use an efficient "divide and conquer" algorithm. These techniques are faster then zheev and dsyev, however they require more memory. This is the default setting.

Setting the value to 2 2 uses the newest Lapack3.0 zheevr and dsyevr routines. These are by far the fastest techniques, however in several tests they failed to find eigenvectors.

你们计算时,一般都是如何设置的?
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