  We consider the problem of finding repetitive structures and inherent
patterns in a given string $\s{s}$ of length $n$ over a finite totally ordered
alphabet. A border $\s{u}$ of a string $\s{s}$ is both a prefix and a suffix of
$\s{s}$ such that $\s{u} \not= \s{s}$. The computation of the border array of a
string $\s{s}$, namely the borders of each prefix of $\s{s}$, is strongly
related to the string matching problem: given a string $\s{w}$, find all of its
occurrences in $\s{s}$. A {\itshape Lyndon word} is a primitive word (i.e., it
is not a power of another word) which is minimal for the lexicographical order
of its conjugacy class (i.e., the set of words obtained by cyclic rotations of
the letters). In this paper we combine these concepts to introduce the
\emph{Lyndon Border Array} $\mathcal L \beta$ of $\s{s}$, whose $i$-th entry
$\mathcal L \beta(\s{s})[i]$ is the length of the longest border of $\s{s}[1
\dd i]$ which is also a Lyndon word. We propose linear-time and linear-space
algorithms for computing $\mathcal L \beta (\s{s})$. %in the case of both
binary and bounded alphabets. Further, we introduce the \emph{Lyndon Suffix
Array}, and by modifying the efficient suffix array technique of Ko and Aluru
\cite{KA03} outline a linear time and space algorithm for its construction.
