LAPACK
3.8.0
LAPACK: Linear Algebra PACKage

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Functions/Subroutines  
subroutine  dlag2 (A, LDA, B, LDB, SAFMIN, SCALE1, SCALE2, WR1, WR2, WI) 
DLAG2 computes the eigenvalues of a 2by2 generalized eigenvalue problem, with scaling as necessary to avoid over/underflow. More...  