\documentclass[12pt]{article}
\usepackage{amsmath,amssymb,amsfonts}
\begin{document}
The binary and ternary codes spanned by the rows of
the point by block, pair by block, block by point
incidence matrices of some 2-designs of small orders
and their orthogonal complements are studied. Among
some results, it is shown that if the code is
properly chosen, then the weight distribution of the
code serves as an appropriate design isomorphism
invariant. The automorphism groups of the codes and
the design are computed.
\end{document}