DegreeGraphDistribution[dlist] represents a degree graph distribution with vertex degree dlist.
DihedralGroup[n] represents the dihedral group of order 2 n.
DistributionParameterAssumptions[dist] gives a logical expression for assumptions on parameters in the symbolic distribution dist.
DivisorSum[n, form] represents the sum of form[i] for all i that divide n.DivisorSum[n, form, cond] includes only those divisors for which cond[i] gives True.
DualSystemsModel[ss] gives the dual of the StateSpaceModel object ss.
EdgeStyle is an option and property for Graph and related functions that specifies what style to use for edges.
Equivalent[e_1, e_2, ...] represents the logical equivalence e_1 \[DoubleLeftRightArrow] e_2 \[DoubleLeftRightArrow] ..., giving True when all of the e_i are the same.
EventLabels is an option to CandlestickChart, KagiChart, and similar functions that specifies events to labels.
Exponent[expr, form] gives the maximum power with which form appears in the expanded form of expr. Exponent[expr, form, h] applies h to the set of exponents with which form ...
ExtentSize is an option to DiscretePlot and DiscretePlot3D that specifies how far to extend out from each plot point.