- Pavel Holoborodko on The Strange Case of the Determinant of a Matrix of 1s and -1s
- Jan Van lent on The Strange Case of the Determinant of a Matrix of 1s and -1s
- ChrisRackauckas on How Fast is Quadruple Precision Arithmetic?
- Len Freeman on Christopher T. H. Baker (1939–2017)
- Jeff Paris & Alena Vencovska on Christopher T. H. Baker (1939–2017)
Tag Archives: correlations
I’ve written before (here) about the increasingly common problem of matrices that are supposed to be correlation matrices (symmetric and positive semidefinite with ones on the diagonal) turning out to have some negative eigenvalues. This is usually bad news because … Continue reading
Anderson acceleration, also known in quantum chemistry as Pulay mixing or direct inversion in the iterative subspace (DIIS), is a technique for accelerating the convergence of a fixed-point iteration. It has been widely used in electronic structure computations, but does … Continue reading