TY - JOUR AU - Jimenez Trejo, G. AU - Negro Vadillo, Francisco Javier AU - Nieto Calzada, Luis Miguel AU - Cruz y Cruz, Sara PY - 2026 SN - 0003-4916 UR - https://uvadoc.uva.es/handle/10324/83943 AB - We analyze two-dimensional systems related to the Helmholtz equation that allow separation of variables in both polar and parabolic coordinates. We pay special attention to the symmetry algebras involved in the separation of variables. We show how the... LA - eng PB - Elsevier KW - Helmholtz equation KW - Geometric symmetries KW - Dynamical symmetries KW - Separation of variables KW - Polar and parabolic coordinates KW - Makarov potential TI - Polar and parabolic separable extensions of the two dimensional Helmholtz equation in free space: From geometric to dynamical symmetries DO - 10.1016/j.aop.2026.170460 ER -