The paper investigates the nonlinear self-adjointness of the nonlinear inviscid barotropic
nondivergent vorticity equation in a beta-plane. It is a particular form of Rossby equation …

The generalized conditional symmetry (GCS) method is applied to a specific case of the
Grad–Shafranov (GS) equation, in cylindrical geometry assuming the existence of an axial …

The paper presents a connection between Lie symmetries and conservation laws for the 2D
Ricci flow model. The procedure starts by obtaining a set of multipliers which generates …

The paper proposes a general procedure to find the form of the gauge fixing term in the
extended BRST quantization of the gauge theories, a difficult problem in the standard …

The construction of a multidifferential complex, ie a differential complex with many
differential operators, is presented. By a suitable choice of generators, the differentials …

An extended BRST symmetry allows to obtain many non-minimal terms, which are very
useful in the gauge-fixing procedure of the extended Hamiltonian. By structuring the …

The possibility of the extension of the BRST symmetry to the symplectic group sp (3) for the
dynamical systems with first class independent constraints is proved in the Hamiltonian …

We investigate a generalized form of the Boussinesq equation, relevant for nerve pulse
propagation in biological membranes. The generalized conditional symmetry (GCS) method …

The paper offers the complete form of the BRST charges and of the extended Hamiltonian
for the first-rank theories in the context of the sp (3) BRST symmetry. A theorem is proposed …

This letter focuses on the matter of the Hamiltonian description of reducible dynamical
systems using the BRST technique. We will have in mind important examples as the …