DiscreteLyapunovSolve[a, c] finds the numeric solution x of the discrete matrix equation a.x.a\[ConjugateTranspose] - x == c.DiscreteLyapunovSolve[a, b, c] solves a.x.b - x ...
Discriminant[poly, var] computes the discriminant of the polynomial poly with respect to the variable var.Discriminant[poly, var, Modulus -> p] computes the discriminant ...
Distribute[f[x_1, x_2, ...]] distributes f over Plus appearing in any of the x_i. Distribute[expr, g] distributes over g. Distribute[expr, g, f] performs the distribution ...
Dividers is an option for Grid and related constructs that specifies where and how to draw divider lines.
Do
(Built-in Mathematica Symbol) Do[expr, {i_max}] evaluates expr i_max times. Do[expr, {i, i_max}] evaluates expr with the variable i successively taking on the values 1 through i_max (in steps of 1). ...
EdgeLabels is an option and property for Graph and related functions that specifies what labels and label positions should be used for edges.
EdgeQ
(Built-in Mathematica Symbol) EdgeQ[g, e] yields True if e is an edge in the graph g and False otherwise.
EdgeShapeFunction is an option and property for Graph and related functions that specifies a function to use to generate primitives for rendering each edge.
EffectiveInterest[r, q] gives the effective interest rate corresponding to interest specification r, compounded at time intervals q.
EllipticThetaPrime[a, u, q] gives the derivative with respect to u of the theta function \[CurlyTheta]_a (u, q) (a = 1, ..., 4).