Protein ComparisonIndex Sets and Their Members The following index sets and their members are used in this example: g element-of StartSet 1 comma 2 EndSet i element-of NODES left-bracket g right-bracket left-parenthesis i comma k right-parenthesis comma left-parenthesis j comma l right-parenthesis element-of EDGES left-bracket g right-bracket left-parenthesis i comma j right-parenthesis comma left-parenthesis k comma l right-parenthesis element-of IJ equals NODES left-bracket 1 right-bracket times NODES left-bracket 2 right-bracket left-parenthesis i comma j comma k comma l right-parenthesis element-of EDGE normal bar PAIRS : pairs of edges that can possibly correspond to each other Copyright © SAS Institute Inc. All rights reserved.Last updated: August 10, 2020