Eigenvalue, Eigenvector decompose (Evd) for a specific value stops...

[syryuauros]

When I try to get eigenvector using Evd(), It stops...

var bt = DenseMatrix.OfArray(new double[,] { { x11, x12, x13, x14 }, { x21, x22, x23, x24 }, { x31, x32, x33, x34 }, { x41, x42, x43, x44 } });

//x14 = 1, x23 = -1, x32 =9, x41=-9 and the others are all zero.

Evd evd_btc = btc.Evd();

stops hear.

But if I try other value like //x14 = 1, x23 = -1, x32 =8.99999, x41=-9 and the others are all zero.

it works well.

Why does this happen