BeniniDistribution[\[Alpha], \[Beta], \[Sigma]] represents a Benini distribution with shape parameters \[Alpha] and \[Beta] and scale parameter \[Sigma].
BenktanderGibratDistribution[a, b] represents a Benktander distribution of type I with parameters a and b.
BenktanderWeibullDistribution[a, b] represents a Benktander distribution of type II with parameters a and b.
BernoulliB[n] gives the Bernoulli number B_n. BernoulliB[n, x] gives the Bernoulli polynomial B_n (x).
BernoulliDistribution[p] represents a Bernoulli distribution with probability parameter p.
BernoulliGraphDistribution[n, p] represents a Bernoulli graph distribution for n-vertex graphs with edge probability p.
BernsteinBasis[d, n, x] represents the n\[Null]^th Bernstein basis function of degree d at x.
BesselI
(Built-in Mathematica Symbol) BesselI[n, z] gives the modified Bessel function of the first kind I_n (z).
BesselJ
(Built-in Mathematica Symbol) BesselJ[n, z] gives the Bessel function of the first kind J_n (z).
BesselJZero[n, k] represents the k\[Null]^th zero of the Bessel function J_n (x).BesselJZero[n, k, x_0] represents the k\[Null]^th zero greater than x_0.