palindromePalindrome2002-08-18 14:50:032006-10-23 17:02:10Definition\usepackage{amssymb}
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%\usepackage{xypic}A \emph{palindrome} is a number which yields itself when its digits are reversed. Some palindromes (in base 10) are :
\begin{itemize}
\item 121
\item 2002
\item 314159951413
\end{itemize}
Clearly one can construct palindromes of arbitrary length by taking any number and appending to it a reversed copy of itself or of all but the last digit.
The concept of palindromes can also be extended to sequences and strings.