\documentclass[12pt]{article}
\usepackage{amsmath,amssymb,amsfonts}
\begin{document}
We introduce the notion of Lagrangian and Hamiltonian constraint structure
coefficients. These coefficients appear in the process of investigating
the consistency condition on constraints in both formulations. Then we show
that for a first-class Hamiltonian constrained system one can find all the
Lagrangian coefficients in terms of Hamiltonian ones.
\end{document}