HilbertMatrix[n] gives the n*n Hilbert matrix with elements of the form 1/(i + j - 1).HilbertMatrix[{m, n}] gives the m*n Hilbert matrix.
Median
(Built-in Mathematica Symbol) Median[list] gives the median of the elements in list. Median[dist] gives the median of the symbolic distribution dist.
Ordering[list] gives the positions in list at which each successive element of Sort[list] appears. Ordering[list, n] gives the positions in list at which the first n elements ...
Quotient[m, n] gives the integer quotient of m and n. Quotient[m, n, d] uses an offset d.
Real
(Built-in Mathematica Symbol) Real is the head used for real (floating-point) numbers.
Successor[e] gives the next element in a canonical ordering of the field elements.
ExpressionTree[e] plots the expression tree of e.ExpressionTreePlot[e, pos] plots the expression tree of e with its root placed at position pos.ExpressionTreePlot[e, pos, ...
CoefficientArrays[polys, vars] gives the arrays of coefficients of the variables vars in the polynomials polys.
GraphDistance[g, s, t] gives the distance from source vertex s to target vertex t in the graph g.GraphDistance[g, s] gives the distance from s to all vertices of the graph g.
JacobiZeta[\[Phi], m] gives the Jacobi zeta function Z(\[Phi] \[VerticalSeparator] m).