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*> RWORK(5) = max_{i.NE.j} |COS(A(:,i),A(:,j))| in the last sweep.
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*> This is useful information in cases when CGESVJ did
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*> not converge, as it can be used to estimate whether
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*> RWORK(6) = the largest absolute value over all sines of the
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*> Jacobi rotation angles in the last sweep. It can be
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*> useful for a post festum analysis.
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*> no computation is done; RWORK(1) is set to the minial (and optimal)