ЗМІСТ

Freericks J.K., Shvaika A.M.
Honorary issue dedicated to the 80th anniversary of Professor Ihor Stasyuk

Yevych R., Vysochanskii Yu.
Description of lattice anharmonicity observed in ferroelectrics with unusual three-well local potential

Weitzman M., Freericks J.K.
Calculating spherical harmonics without derivatives

Laba H.P., Tkachuk V.M.
Geometric measure of mixing of quantum state

Lemański R., Matysiak J.
Two-orbital Hubbard model vs spin S=1 Heisenberg model: studies on clusters

Lytvynenko D.M., Slyusarenko Yu.V., Kirdin A.I.
On the spatially periodic ordering in the system of electrons above the surface of liquid helium in an external electric field

Richter-Laskowska M., Khan H., Trivedi N., Maśka M.M.
A machine learning approach to the Berezinskii-Kosterlitz-Thouless transition in classical and quantum models

A. Di Ciolo, Avella A.
The composite operator method route to the 2D Hubbard model and the cuprates

Zachek I.R, Levitskii R.R., Vdovych A.S.
Deformation effects in glycinium phosphite ferroelectric

Shubnyi V.O., Sharapov S.G., Skrypnyk Y.V.
Impurity induced broadening of Drude peak in strained graphene

Pogorelov Y.G., Loktev V.M.
On the theory of high-T _c superconductivity of doped cuprates

Hutak T., Müller P, Richter J., Krokhmalskii T., Derzhko O.
The spin-1/2 Heisenberg ferromagnet on the pyrochlore lattice: A Green's function study

Plakida N.M.
Electronic spectrum and superconductivity in the t-J model on the honeycomb lattice

Shvaika A.M., Matveev O.P., Devereaux T.P., Freericks J.K.
Interpreting pulse-shape effects in pump-probe spectroscopies

Russier V., Ngo E.
Erratum: "Ferromagnetic order in dipolar systems with anisotropy: application to magnetic nanoparticle supracrystals" [Condens. Matter Phys. 2017 20 No 3 33703: 1–10 DOI:10.5488/CMP.20.33703]