What is Hypergeometric function: Definition and 31 Discussions
In mathematics, the Gaussian or ordinary hypergeometric function 2F1(a,b;c;z) is a special function represented by the hypergeometric series, that includes many other special functions as specific or limiting cases. It is a solution of a second-order linear ordinary differential equation (ODE). Every second-order linear ODE with three regular singular points can be transformed into this equation.
For systematic lists of some of the many thousands of published identities involving the hypergeometric function, see the reference works by Erdélyi et al. (1953) and Olde Daalhuis (2010). There is no known system for organizing all of the identities; indeed, there is no known algorithm that can generate all identities; a number of different algorithms are known that generate different series of identities. The theory of the algorithmic discovery of identities remains an active research topic.
I believe it is the case that any linear second order ode with at most 3 regular singular points can be transformed into a hypergeometric function. I am trying to solve the following equation for a(x):
where E, m, v, k_{y} are all constants and I believe turning it into hypergeometric form will...
I also don't understand how to get the descending factorials for this hypergeometric series, I also know that there is another way to write it with gamma functions, but in any case how am I supposed to do this?
If I write it as a general term, wolfram will give me the result
which leaves me...
I struggle to find an appropriate inverse Laplace transform of the following
$$F(p)= 2^n a^n \frac{p^{n-1}}{(p+a)^{2n}}, \quad a>0.$$
WolframAlpha gives as an answer
$$f(t)= 2^n a^n t^n \frac{_1F_1 (2n;n+1;-at)}{\Gamma(n+1)}, \quad (_1F_1 - \text{confluent hypergeometric function})$$
which...
The associated Legendre Function of Second kind is related to the Legendre Function of Second kind as such:
$$
Q_{n}^m(z)= (-1)^m (1-z^2)^{m/2} \frac{d^m}{dz^m}(Q_{n}(z))
$$
The recurrence relations for the former are the same as those of the first kind, for which one of the relations is:
$$...
I am looking for the expectation of a fraction of Gauss hypergeometric functions.
$$E_X\left[\frac{{}_2F_1\left(\begin{matrix}x+a+1\\x+a+1\end{matrix},a+1,c\right)}{{}_2F_1\left(\begin{matrix}x+a\\x+a\end{matrix},a,c\right)}\right]=?$$
Are there any identities that could be used to simplify or...
Homework Statement
_2F_1(a,b;c;x)=\sum^{\infty}_{n=0}\frac{(a)_n(b)_n}{(c)_nn!}x^n
Show that Legendre polynomial of degree ##n## is defined by
P_n(x)=\,_2F_1(-n,n+1;1;\frac{1-x}{2})
Homework Equations
Definition of Pochamer symbol[/B]
(a)_n=\frac{\Gamma(a+n)}{\Gamma(a)}
The Attempt at a...
Hello everyone
I am trying to write code in ROOT.I want to plot generalized hypergeometric function pFq with p=0 and q=3 i.e I want to plot 0F3(;4/3,5/3,2;x) as a function of x using TF1 class.I am not getting how to plot this function in ROOT.Kindly help me out.
Thanks in Advance
Homework Statement
Hello, I've recently encountered this double integral
$$\int_0^1 dv \int_0^1 dw \frac{(vw)^n(1-v)^m}{(1-vw)^\alpha} $$
with ## \Re(n),\Re(m) \geq 0## and ##\alpha = 1,2,3##.
Homework Equations
I use Table of Integrals, Series and Products by Gradshteyn & Ryzhik as a...
Hello all,
I have this integral, and currently I'm evaluating it using Mathematica numerically, which takes time to be evaluated. Can I write it in a way that the integral has a formula in the Table of Integrals?
\int_0^{\infty} F\left(a_1,a_2;a_3;a_4-a_5x\right) e^{-x}\,dx
where...
I am looking to write the hypergeometric function $${}_2F_1\left(1,1,2+\epsilon, -\frac{\alpha}{\beta}\right) = \int_0^1\,dt\,\frac{(1-t)^{\epsilon}}{1-tz + i\delta},$$ where ##z=-\alpha/\beta## and ##0< \beta < - \alpha##, in terms of its real and imaginary part. The ##i\delta## prescription...
Homework Statement
It is very well known that ## \sum^{\infty}_{n=0}x^n=\frac{1}{1-x}##. How to show that
## \sum^{\infty}_{n=0}\frac{(a)_n}{n!}x^n=\frac{1}{(1-x)^a}##
Where ##(a)_n=\frac{\Gamma(a+n)}{\Gamma(a)}##
[/B]Homework Equations
## \Gamma(x)=\int^{\infty}_0 e^{-t}t^{x-1}dt##
The...
i want to write a hypergeometric function (2F1(a,b;c,x)) as function of n that generate polynomials below
n=0 → 1
n=1 → y
n=2 → 4(ω+1)y^2-1
n=3 → y(2(2ω+3)y^2-3)
n=4 → 8(ω+2)(2ω+3)y^4-6(6+4ω)y^2+3
... → ...
2F1(a,b;c,x)=1+(ab)/(c)x+(a(a+1)b(b+1))/(c(c+1))x^2/2!+...
the...
How to integrate:
_{2}F_{1}(B;C;D;Ex^{2})\,Ax
where _{2}F_{1}(...) is the hypergeometric function, x is the independent variable and A, B, C, D, and E are constants.
How can I perform this integral
\begin{equation}
\int^∞_a dq \frac{1}{(q+b)} (q^2-a^2)^n (q-c)^n ?
\end{equation}
all parameters are positive (a, b, and c) and n>0.
I tried using Mathemtica..but it doesn't work!
if we set b to zero, above integral leads to the hypergeometric...
I'm having difficulty in solving an exercise.
http://imageshack.us/a/img542/484/765z.jpg
They ask to reduce it to
http://imageshack.us/a/img203/3986/lwqb.jpg
making the change of variables x=r^2/(r^2+1)
and then to reduce it to a hypergeometric , using...
Hi,
I would like to show directly,
\int \frac{e^{at}}{e^{it}+e^{-it}}dt=\frac{e^{(i+a) t} \text{Hypergeometric2F1}\left[1,\frac{1}{2}-\frac{i a}{2},\frac{3}{2}-\frac{i a}{2},-e^{2 i t}\right]}{i+a}
I realize I can differentiate the antiderivative to show the relation but was wondering...
Homework Statement
Calculate
_2F_1(\frac{1}{2},\frac{1}{2},\frac{3}{2};x)
Homework Equations
_2F_1(a,b,c;x)=\sum^{\infty}_{n=0}\frac{(a)_n(b)_n}{n!(c)_n}x^n
(a)_n=a(a+1)...(a+n-1)
The Attempt at a Solution
(\frac{1}{2})_n=\frac{1}{2}\frac{3}{2}\frac{5}{2}...\frac{2n-1}{2}...
Hypergeometric function is defined by:
_2F_1(a,b,c,x)=\sum^{\infty}_{n=0}\frac{(a)_n(b)_n}{n!(c)_n}x^n
where ##(a)_n=a(a+1)...(a+n-1)##...
I'm confused about this notation in case, for example, ##_2F_1(-n,b,b,1-x)##.
Is that
_2F_1(-n,b,b,1-x)=\sum^{\infty}_{n=0}\frac{(-n)_n}{n!}(1-x)^n
or...
Homework Statement Find the general solution in terms of Hypergeometric functions near x = -1 :
(1-x2)y'' - (5x2 - 9)/5x y' + 8y = 0 The Attempt at a Solution
Here the coefficient of y' contains 9/5x which causes problem. The general form contains the coefficient of y' as A+Bx
How do I solve this?
Now, i am getting the problem with this type of function. Giving z belongs to C(field of complex numbers), f(z)=hypergeometric(1,n/2,(3+n)/2,1/z).
Do you know how we can obtain a simple performance of f(z) which allows us to take the integral of f(z)/sqrt(1-z) from 1 to Y(an particular...
Homework Statement
Hermite differential equation: y"(x) -2xy'(x)+2ny(x)=0Homework Equations: y(x)=C_{n}(x)H_{n}(x) though it won't have to do with my 1st question directly & change of variable: z=x^{2}
The Attempt at a Solution: procedure: dy/dx=2\sqrt{z}dy/dz
1st Question: I want to find now...
Homework Statement
I want to differentiate the Gauss hypergeometric function:
_2F_1[a,b;c;\frac{k-x}{z-x}]
with respect to z
Homework Equations
The derivative of
_2F_1[a,b;c;z]
with respect to z is:
\frac{ab}{c} _2F_1[1+a,1+b;1+c;z]
The Attempt at a Solution
Can I treat this as...
I'm looking for any kind of reference on a multivariable generalization of a (confluent) hypergeometric function.
In particular, Horns list is a list of 34 two-variable hypergeometric functions, 20 of which are confluent. Then one of these has the following series expansion:
\Phi_2(\beta...
I posted this in the Advanced Physics forum as well, but it occurred to me that this might be a more appropriate place. I'd delete it in Advanced Physics, but I can't see where to do that.
Homework Statement
I'm need to integrate the function
\frac{A}{(1+B^2x^2)^{\frac{C+1}{2}}}
which...
I am trying to calculate the following integral
I=\int_0^\infty\frac{x}{(x+ia)^2} {\mbox{$_2$F$_1\!$}}\left(\frac{1}{2},b,\frac{3}{2},-\frac{x^2}{c^2}\right) dx.
I tried several different ways but drew a complete blank. Is there a way of converting this nasty hypergeometric function into...
Homework Statement
I have seen some hypergeometric function in the form:
2F1=(a,b;c;d),
Is there such thing as:
2F1=(a,b,c;d)
Homework Equations
The Attempt at a Solution
I don't understand why sometimes we have a comma and sometimes we have a semi-colon.
thank you
Hello,
for some calculation I need the behaviour of the hypergeometric function 2F1 near z=\tfrac{1}{2}. Specifically I need
_2 F_1(\mu,1-\mu,k,\tfrac{1}{2}+i x)
with x\in \mathbb{R} near 0, and 1/2\leq\mu\leq 2, 1\leq k \in \mathbb{N}.
Differentiating around x=0 and writing the...
Homework Statement
write the following serie in the form of hypergeometric function:
f(x)=\sum\frac{(-1*(x^2))^n}{(2^n)(2n-1)(2n+1)(2n+3)}
n changes from 0 to \infty
Homework Equations
hypergeometric function:
The Attempt at a Solution
guys i have thought about this for 2...
How would i go about showing the special case F(1, b, b; x) of the hypergeometic function is the geometric series and also how the geometric series is = 1/ (1 -x)
Cheers,
Dave
I am having trouble with a problem that asks me to show that if I change the variable of integration of the following equation from t to t-1 the following
http://mathworld.wolfram.com/images/equations/EulersHypergeometricTransformations/equation1.gif
(disregard that z in the denominator, that...