CyclicGroup[n] represents the cyclic group of degree n.
DamerauLevenshteinDistance[u, v] gives the Damerau\[Dash]Levenshtein distance between strings or vectors u and v.
DihedralGroup[n] represents the dihedral group of order 2 n.
E
(Built-in Mathematica Symbol) E is the exponential constant E (base of natural logarithms), with numerical value \[TildeEqual] 2.71828.
EulerGamma is Euler's constant \[Gamma], with numerical value \[TildeEqual] 0.577216.
ExportString[expr, " format"] generates a string corresponding to expr exported in the specified format. ExportString[rules, {"format", "Rules"}] gives explicit rules for ...
FindGraphIsomorphism[g_1, g_2] finds an isomorphism that maps the graph g_1 to g_2 by renaming vertices.
ImageKeypoints[image] finds key features in image and returns their coordinates.ImageKeypoints[image, prop] gives the specified property prop for each keypoint.
ItemSize is an option for Grid, Column, and related constructs that specifies the sizes to allow for items.
JaccardDissimilarity[u, v] gives the Jaccard dissimilarity between Boolean vectors u and v.