RationalInterpolation[expr, {x, m, n}, {x_1, x_2, ..., x n + m + 1}] gives the rational interpolant to expr with numerator order m and denominator order n, where x_1, x_2, ...
SpearmanRankCorrelation[xlist, ylist] gives Spearman's rank correlation coefficient \[Rho] for the real-valued vectors xlist and ylist.
ButcherPhi
(Numerical Differential Equation Analysis Package Symbol) ButcherPhi[tree, s] gives the weight of tree in an s-stage Runge\[Dash]Kutta method. ButcherPhi[tree] gives the weight of tree in stage-independent tensor notation.
NewtonCotesError[n, f, a, b] gives the error in the elementary n-point Newton-Cotes quadrature formula for the function f on an interval from a to b.
LegendBorderSpace is an option for Legend which sets the space around the entire set of key boxes and text in the legend.
LegendSpacing is an option for Legend which specifies the amount of space around each key box on a scale where the box is 1.
LegendTextDirection is an option for Legend, which specifies the direction of text next to the key box.
PlotLegend is an option for Plot, ListPlot, and related functions that assigns text to lines in a 2D plot to create a legend for that plot.
Div
(Vector Analysis Package Symbol) Div[f] gives the divergence, \[Del]\[CenterDot]f, of the vector field f in the default coordinate system. Div[f, coordsys] gives the divergence of f in the coordinate system ...
ExpressionToSymbolicMathML[expr] converts the Mathematica expression, expr, into a MathML-flavored SymbolicXML structure.