OwenT (Built-in Mathematica Symbol)

OwenT[x, a] gives Owen's T function T(x, a).

SquaresR (Built-in Mathematica Symbol)

SquaresR[d, n] gives the number of ways r_d (n) to represent the integer n as a sum of d squares.

Together (Built-in Mathematica Symbol)

Together[expr] puts terms in a sum over a common denominator, and cancels factors in the result.

WeierstrassP (Built-in Mathematica Symbol)

WeierstrassP[u, {g_2, g_3}] gives the Weierstrass elliptic function \[WeierstrassP](u; g_2, g_3).

CarmichaelLambda (Built-in Mathematica Symbol)

CarmichaelLambda[n] gives the Carmichael function \[Lambda](n), defined as the smallest integer m such that k^m \[Congruent] 1 mod n for all k relatively prime to n.

WeierstrassPPrime (Built-in Mathematica Symbol)

WeierstrassPPrime[u, {g_2, g_3}] gives the derivative of the Weierstrass elliptic function \[WeierstrassP](u; g_2, g_3).

JacobiDS (Built-in Mathematica Symbol)

JacobiDS[u, m] gives the Jacobi elliptic function ds(u | m).

JacobiND (Built-in Mathematica Symbol)

JacobiND[u, m] gives the Jacobi elliptic function nd(u | m).

JacobiSD (Built-in Mathematica Symbol)

JacobiSD[u, m] gives the Jacobi elliptic function sd(u | m).

IntegerExponent (Built-in Mathematica Symbol)

IntegerExponent[n, b] gives the highest power of b that divides n.