hi, I am using fortran to get the Eigen values for generalized Eigen value problem of type Ax=lamda.Bx. I am using lapack routine dsygv for this and it works perfectly for all my 5 case studies and not working as expected for the 6th one. i get first two Eigen values as -ve which was not expected. I do not see anything which could cause this error. both matrices are symmetric square matrices, all diagonals are positive. I am attaching the A and B matrices here. someone could look into them to see what is going wrong. appreciate any guidance on this.
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