EllipticNomeQ[m] gives the nome q corresponding to the parameter m in an elliptic function.
E
(Built-in Mathematica Symbol) E is the exponential constant E (base of natural logarithms), with numerical value \[TildeEqual] 2.71828.
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 is Euler's constant \[Gamma], with numerical value \[TildeEqual] 0.577216.
ExactNumberQ[expr] returns True if expr is an exact real or complex number, and returns False otherwise.
Exclusions is an option that specifies where to exclude in regions used by functions like Plot, Plot3D, and NIntegrate.
ExpressionCell[expr] gives an expression cell that can appear in a Mathematica notebook. ExpressionCell[expr, " style"] gives an expression cell with the specified style.
FactorSquareFree[poly] pulls out any multiple factors in a polynomial.
FactorTermsList[poly] gives a list in which the first element is the overall numerical factor in poly, and the second element is the polynomial with the overall factor ...
FactorTerms[poly] pulls out any overall numerical factor in poly. FactorTerms[poly, x] pulls out any overall factor in poly that does not depend on x. FactorTerms[poly, {x_1, ...