Every year on 22 July, math lovers around the world take a moment to celebrate something special—Pi Approximation Day. This day is dedicated to the mathematical constant π (pi), one of the most ...

It is of fundamental interest in statistics to test the significance of a set of covariates. For example, in genomewide association studies, a joint null hypothesis of no genetic effect is tested for ...

The convergence rate is investigated for the solutions to difference schemes approximating the mixed initial boundary value problem for general systems of differential equations. It is shown that if ...