This monthly journal, begun in 1950, is devoted entirely to research in pure and applied mathematics, principally to the publication of original papers of moderate length. A section called Shorter ...

The partial transpose of density matrices in many-body systems has been known as an important tool to diagnose quantum entanglement of mixed states. In particular, it can be used to define the ...

This is a preview. Log in through your library . Abstract Abstract.The Sylvester equation has numerous applications in control and system theory, power system, linear algebra, model reduction and ...