Reviews of topical problems

A.V. Bagulya, V.M. Grichine, V.N. Ivanchenko “Integral hadron—nuclear cross sections” Phys. Usp. 69 107–115 (2026)

A.F. Barabanov, V.E. Valiulin, A.V. Mikheyenkov, P.S. Savchenkov “Spherically symmetric approaches in the low-dimensional magnetism theory” Phys. Usp. 69 116–137 (2026)

S.I. Sadovnikov, A.I. Gusev “Anisotropy of elasticity of strongly nonstoichiometric disordered cubic carbides MC_y (M= Ti, Zr, Hf, Nb, Ta) and monoxides MO_y (M = Ti, V, Nb)” Phys. Usp. 69 138–160 (2026)

Physics of our days

A.A. Ostapchuk “Slow slip on tectonic faults” Phys. Usp. 69 161–168 (2026)

Instruments and methods of investigation

A.K. Kaveev, G.I. Kropotov “Physical principles of filtration and the design of terahertz radiation filters” Phys. Usp. 69 169–188 (2026)

Methodological notes

A.V. Belinsky, I.I. Dzhadan “Nonlocality and nonseparability of quantum and relativistic systems” Phys. Usp. 69 189–194 (2026)

B.I. Sturman, E.V. Podivilov “On characteristic times for kinetics of scattering” Phys. Usp. 69 195–198 (2026)

Personalia

N.S. Averkiev, P.I. Arseev, M.M. Glazov, A.G. Zabrodskii, S.V. Ivanov, V.V. Kveder, Z.D. Kvon, V.M. Pudalov, M.V. Sadovskii, O.V. Rudenko, S.A. Tarasenko, D.R. Khokhlov “Eugeniyus Levovich Ivchenko (on his 80th birthday)” Phys. Usp. 69 199–201 (2026)

Scientific news

Yu.N. Eroshenko “Physics news on the Internet: February 2026” Phys. Usp. 69 202–203 (2026)