Bernoulli polynomials of the second kind
The Bernoulli polynomials of the second kind ψn(x), also known as the Fontana-Bessel polynomials, are the polynomials defined by the following generating function:
The first five polynomials are:
Some authors define these polynomials slightly differently
so that
and may also use a different notation for them (the most used alternative notation is bn(x)).
The Bernoulli polynomials of the second kind were largely studied by the Hungarian mathematician Charles Jordan, but their history may also be traced back to the much earlier works.
Integral representations
The Bernoulli polynomials of the second kind may be represented via these integrals
as well as
These polynomials are, therefore, up to a constant, the antiderivative of the binomial coefficient and also that of the falling factorial.
Explicit formula
For an arbitrary n, these polynomials may be computed explicitly via the following summation formula
where s(n,l) are the signed Stirling numbers of the first kind and Gn are the Gregory coefficients.
Recurrence formula
The Bernoulli polynomials of the second kind satisfy the recurrence relation
or equivalently
The repeated difference produces
Symmetry property
The main property of the symmetry reads
Some further properties and particular values
Some properties and particular values of these polynomials include
where Cn are the Cauchy numbers of the second kind and Mn are the central difference coefficients.
Expansion into a Newton series
The expansion of the Bernoulli polynomials of the second kind into a Newton series reads
Some series involving the Bernoulli polynomials of the second kind
The digamma function Ψ(x) may be expanded into a series with the Bernoulli polynomials of the second kind in the following way
and hence
and
where γ is Euler's constant.
Furthermore, we also have
where Γ(x) is the gamma function.
The Hurwitz and Riemann zeta functions may be expanded into these polynomials as follows
and
and also
The Bernoulli polynomials of the second kind are also involved in the following relationship
between the zeta functions, as well as in various formulas for the Stieltjes constants, e.g.
and
See also
- Bernoulli polynomials
- Stirling polynomials
- Gregory coefficients
- Bernoulli numbers
- Difference polynomials
- Poly-Bernoulli number
- Mittag-Leffler polynomials
Credits to the contents of this page go to the authors of the corresponding Wikipedia page: en.wikipedia.org/wiki/Bernoulli polynomials of the second kind.