New posts in Positive Semidefinite

What is the Hessian of the spectral norm?

Determining if a symmetric matrix is positive definite

Are positive definite matrices robust to "small changes"?

If a matrix $A$, not necessarily symmetric, has real, nonnegative eigenvalues, is it positive semidefinite?

Is a sinc-distance matrix positive semidefinite?

Ensuring that a symmetric matrix with nonnegative elements is positive semidefinite

About positive semidefiniteness of one matrix

What is the proof that covariance matrices are always semi-definite?

Is the product of symmetric positive semidefinite matrices positive definite?

Intuitive explanation of a positive semidefinite matrix