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[Lapack] zheevr()

Hello,

 

I wonder why there is no interface of the routine zheevr() to compute
the top and bottom eigen-pairs? Currently, I have to call it twice. I
would think that one call should be able to reduce much of CPU time, at
least those for reducing the matrix to the tri-diagonal one.

 

Any comments or suggestions are appreciated.

 

Jun Zhao

KLA-Tencor Corp.

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