© 2016, Pleiades Publishing, Ltd.Solutions of two problems are proposed based on the Tschirnhausen transform. The first problem is connected with the construction of minimal polynomials of the numbers of the form tan2(π/n) ...

© Published under licence by IOP Publishing Ltd.We construct the finite-element approximations for mixed variational inequalities with pseudomonotone operators and convex non-differentiable functionals in Sobolev spaces. ...

© Published under licence by IOP Publishing Ltd. When solving many applied problems, it becomes necessary to solve nonlinear equations, including the need to find the roots of polynomials. Therefore, the study of the ...