AppellF1[a, b_1, b_2, c, x, y] is the Appell hypergeometric function of two variables F_1 (a; b_1, b_2; c; x, y).
ArcCsc
(Built-in Mathematica Symbol) ArcCsc[z] gives the arc cosecant csc -1 (z) of the complex number z.
ArcSec
(Built-in Mathematica Symbol) ArcSec[z] gives the arc secant sec -1 (z) of the complex number z.
ArcSinh
(Built-in Mathematica Symbol) ArcSinh[z] gives the inverse hyperbolic sine sinh -1 (z) of the complex number z.
BellB
(Built-in Mathematica Symbol) BellB[n] gives the Bell number B_n. BellB[n, x] gives the Bell polynomial B_n (x).
BesselJ
(Built-in Mathematica Symbol) BesselJ[n, z] gives the Bessel function of the first kind J_n (z).
BSplineBasis[d, x] gives the zeroth uniform B-spline basis function of degree d at x.BSplineBasis[d, n, x] gives the n\[Null]^th uniform B-spline basis function of degree ...
CoshIntegral[z] gives the hyperbolic cosine integral Chi(z).
DivisorSigma[k, n] gives the divisor function \[Sigma]_k (n).
GCD
(Built-in Mathematica Symbol) GCD[n_1, n_2, ...] gives the greatest common divisor of the n_i.