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Lie symmetries of generalized Kawahara equations Vaneeva OO, Zhalij AY. Lie symmetries of generalized Kawahara equations. 2020 ;(12):3-10.
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On the estimation of the Lyapunov function in solutions of a quasilinear fractional system Martynyuk AA. On the estimation of the Lyapunov function in solutions of a quasilinear fractional system. 2020 ;(11):3-8.
Necessary condition for the existence of a simple closed geodesic on a regular tetrahedron in the spherical space Sukhorebska DD. Necessary condition for the existence of a simple closed geodesic on a regular tetrahedron in the spherical space. 2020 ;(10):9-14.
On groups, whose non-normal subgroups are either contranormal or core-free Kurdachenko LA, Pypka AA, Subbotin IYa. On groups, whose non-normal subgroups are either contranormal or core-free. 2020 ;(10):3-8.
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The generalized Hermite polynomials, their properties, and the differential equation which they satisfy Makarov VL. The generalized Hermite polynomials, their properties, and the differential equation which they satisfy. 2020 ;(9):3-9.
