Min
(Built-in Mathematica Symbol) Min[x_1, x_2, ...] yields the numerically smallest of the x_i. Min[{x_1, x_2, ...}, {y_1, ...}, ...] yields the smallest element of any of the lists.
NullSpace[m] gives a list of vectors that forms a basis for the null space of the matrix m.
PolynomialGCD[poly_1, poly_2, ...] gives the greatest common divisor of the polynomials poly_i. PolynomialGCD[poly_1, poly_2, ..., Modulus -> p] evaluates the GCD modulo the ...
PositiveDefiniteMatrixQ[m] tests whether m is a positive definite matrix.
PrivateNotebookOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for notebooks that specifies various low-level notebook settings.
RamanujanTau[n] gives the Ramanujan \[Tau] function \[Tau](n).
RealExponent[x] gives log_10 (|x|).RealExponent[x, b] gives log_b (|x|).
Scan
(Built-in Mathematica Symbol) Scan[f, expr] evaluates f applied to each element of expr in turn. Scan[f, expr, levelspec] applies f to parts of expr specified by levelspec.
Series
(Built-in Mathematica Symbol) Series[f, {x, x_0, n}] generates a power series expansion for f about the point x = x_0 to order (x - x_0) n. Series[f, {x, x_0, n_x}, {y, y_0, n_y}, ...] successively finds ...
StirlingS2[n, m] gives the Stirling number of the second kind \[ScriptCapitalS]_n^(m).