InverseBetaRegularized[s, a, b] gives the inverse of the regularized incomplete beta function.
InverseGammaRegularized[a, s] gives the inverse of the regularized incomplete gamma function.
KelvinBei[z] gives the Kelvin function bei(z).KelvinBei[n, z] gives the Kelvin function bei_n (z).
KelvinBer[z] gives the Kelvin function ber(z).KelvinBer[n, z] gives the Kelvin function ber_n (z).
KelvinKei[z] gives the Kelvin function kei(z).KelvinKei[n, z] gives the Kelvin function kei_n (z).
KelvinKer[z] gives the Kelvin function ker(z).KelvinKer[n, z] gives the Kelvin function ker_n (z).
KroneckerDelta[n_1, n_2, ...] gives the Kronecker delta \[Delta] Subscript[n, 1] Subscript[n, 2] ..., equal to 1 if all the n_i are equal, and 0 otherwise.
Log2
(Built-in Mathematica Symbol) Log2[x] gives the base-2 logarithm of x.
MachinePrecision is a symbol used to indicate machine-number precision.
Method
(Built-in Mathematica Symbol) Method is an option for various algorithm-intensive functions that specifies what internal methods they should use.