Displaying similar documents to “A simple derivation of the eigenvalues of a tridiagonal matrix arising in biogeography”

A counterexample to the Drury permanent conjecture

George Hutchinson (2017)

Special Matrices


We offer a counterexample to a conjecture concerning the permanent of positive semidefinite matrices. The counterexample is a 4 × 4 complex correlation matrix.

A deflation formula for tridiagonal matrices

Miroslav Fiedler (1980)

Aplikace matematiky


An explicit formula for the deflation of a tridiagonal matrix is presented. The resulting matrix is again tridiagonal.