DedekindEta (Built-in Mathematica Symbol)

DedekindEta[\[Tau]] gives the Dedekind eta modular elliptic function \[Eta](\[Tau]).

DirectedEdge (Built-in Mathematica Symbol)

DirectedEdge[u, v] or u \[DirectedEdge] v represents a directed edge from u to v.

Element (Built-in Mathematica Symbol)

Element[x, dom] or x \[Element] dom asserts that x is an element of the domain dom. Element[{x_1, x_2, ...}, dom] asserts that all the x_i are elements of dom. Element[patt, ...

EllipticNomeQ (Built-in Mathematica Symbol)

EllipticNomeQ[m] gives the nome q corresponding to the parameter m in an elliptic function.

Equivalent (Built-in Mathematica Symbol)

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.

EulerGamma (Built-in Mathematica Symbol)

EulerGamma is Euler's constant \[Gamma], with numerical value \[TildeEqual] 0.577216.

GoldenRatio (Built-in Mathematica Symbol)

GoldenRatio is the golden ratio \[Phi] = 1/2 (Sqrt[5] + 1), with numerical value \[TildeEqual] 1.61803.

HankelH1 (Built-in Mathematica Symbol)

HankelH1[n, z] gives the Hankel function of the first kind H_n^(1)(z).

HankelH2 (Built-in Mathematica Symbol)

HankelH2[n, z] gives the Hankel function of the second kind H_n^(2)(z).

HurwitzLerchPhi (Built-in Mathematica Symbol)

HurwitzLerchPhi[z, s, a] gives the Hurwitz\[Dash]Lerch transcendent \[CapitalPhi](z, s, a).