\documentclass[12pt]{article}
\usepackage{amsmath,amssymb,amsfonts}
\begin{document}
The eigenstates and their degeneracy for parasupersymmetric
Hamiltonian of arbitrary order p, corresponding to the motion of a
charged particle with spin $\frac{P}{2}$ on the flat surface in
the presence of a constant magnetic field along z-axis, are
calculated. The eigenstates are expressed in terms of Landau
levels quantum states with dynamical symmetry group $H_{4}$.
Furthermore, parasupersymmetric coherent states with multiplicity
degeneracy are derived for an ad hoc lowering operator of the
eigenstates in terms of ordinary coherent states of Landau
Hamiltonian.
\end{document}