LatticeReduce[{v_1, v_2, ...}] gives a reduced basis for the set of vectors v_i.

NSolve[expr, vars] attempts to find numerical approximations to the solutions of the system expr of equations or inequalities for the variables vars. NSolve[expr, vars, ...

CylindricalDecomposition[ineqs, {x_1, x_2, ...}] finds a decomposition of the region represented by the inequalities ineqs into cylindrical parts whose directions correspond ...

GroupPageBreakWithin is an option for Cell that specifies whether a page break should be allowed within the group of cells if the notebook that contains the group is printed.

PartitionsP[n] gives the number p (n) of unrestricted partitions of the integer n.

Prime[n] gives the n\[Null]^th prime number.

Most of the documentation provided for Mathematica is concerned with explaining what Mathematica does, not how it does it. But the purpose of this is to say at least a little ...

RSolve[eqn, a[n], n] solves a recurrence equation for a[n]. RSolve[{eqn_1, eqn_2, ...}, {a_1[n], a_2[n], ...}, n] solves a system of recurrence equations. RSolve[eqn, a[n_1, ...

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

NeedlemanWunschSimilarity[u, v] gives a number representing the Needleman\[Dash]Wunsch similarity between strings or vectors u and v.