# Rim data

In a linear program, the data values are $LaTeX: (A, b, c)$ plus (possibly) bounds, say $LaTeX: \textstyle L \le x \le U.$ The $LaTeX: A$ matrix pertains to row-column information, whereas all bounds $LaTeX: (L, U),$ right-hand sides $LaTeX: (b),$ and cost coefficients $LaTeX: (c)$ pertain to a column or a row. The latter are called rim data elements because of their position in the following schematic:
$LaTeX: \begin{array}{l|c|l} & column name & \\ \hline \hline \mbox{obj name} & c & \dots\mbox{Min or Max} \\ \hline \hline \mbox{row name} & A & = b \\ \hline \hline \mbox{Lower bound} & L & \\ \mbox{Upper bound} & U & \\ \hline \hline \end{array}$