Negative eigenvalues of a covariance matrix
68132
Small positive eigenvalues found for a negative definite matrix
12090
On Negative AIC Values
153372
Characterization of positive definite matrix with principal minors
77307
Why does inversion of a covariance matrix yield partial correlations between random variables?
158205
If $A+A^T$ is negative definite, then the eigenvalues of $A$ have negative real parts?
51678
Proof that the largest eigenvalue of a stochastic matrix is $1$
86940
Proving an inequality in Eigenvalues of a matrix
140078
Interpretation of eigenvectors of Hessian in context of local min/max/saddle?
123679
General Information about Eigenvalues for an 3x3 symmetric matrix
152395
Random matrix theory impact on covariance matrix analysis
149237
Getting negative predicted values after linear regression
4509
Proof that an involutory matrix has eigenvalues 1,-1
59402
Comparing Eigenvalues of Positive Semidefinite Matrices
109471
The eigenvectors of the transpose operator
125802
Why is EigenValues returning Root expressions?
7612
How can I compute eigenvalues or characteristic polynomial of this matrix? Please help.
135420
Determining eigenvalues, eigenvectors of $A\in \mathbb{R}^{n\times n}(n\geq 2)$.