%0 Journal Article %T Hidden Symmetries in Simple Graphs %A Allen D. Parks %J Symmetry %D 2012 %I MDPI AG %R 10.3390/sym4010219 %X It is shown that each element s in the normalizer of the automorphism group Aut(G) of a simple graph G with labeled vertex set V is an Aut(G) invariant isomorphism between G and the graph obtained from G by the s permutation of V¡ªi.e., s is a hidden permutation symmetry of G. A simple example illustrates the theory and the applied notion of system robustness for reconfiguration under symmetry constraint (RUSC) is introduced. %K graph theory %K automorphism group %K normalizer %K hidden symmetry %K symmetry measures %U http://www.mdpi.com/2073-8994/4/1/219