Hi everyone,
concerning serie representation of psi function.
In te solution of bessel function of the second kind we have the following expressions for the psi functions
psi(m+1) and psi(n+m+1) then they give the series for the two psi functions ie(or digamma function)
sum
k from 1 to m of...
Hi members,
I have a problem with the computation of residues involve the gamma functions.
(see attached Pdf file)
Can you show me for the first residue with the arrows, or give a hint or a link.
Thank you
Hi members,
Laplace transform using differential equations.(see attached PDF file)
My question d/ds(s^2 y- s Y(0)-Y'(0).).......
Y(t)=sin(sqrt(t)) Y(o)=0
Now Y'= cos(sqrt(t)/2sqrt(t) Y'(0)=infinity
d/ds (Y'(0)=?? can it be treated as a constant or can we change limit and...
Hi members,
see attached Pdf file.
For a<0,write b=-a and let x=bt.Then
My question:
how becomes the denominator x+a to 1-t??? I don't see it
Thank you
Hi dear members,
I have a problem with the following integral:
Integral 1/sinh^2(x/2) from -inf to +inf =-2 coth(x/2)
must I consider it as a principal value integral???
Thank you
Hi members,
I have a problem with fourier transforms.
There are two attached Pdf files.
My questions are on the Pdf files.Give me a little help.
Thank you
Belgium 12
Hi
I have a little problem with the integrals of the following functions.
integral from 0to 2pi ∫sin^2(nθ+ψ)dθ=∫cos^2(nθ+ψ)dθ=pi
ψ=the phase angle.They occur in the theory of vibrations.
Is it appropriate to set ψ=0
Thank you
Hi,
Below is a fortran program to calculate the roots of an equation by newton's method.
I compile the program with the free compiler g95:
g95 -c newton.f95 then g95 newton.f95 -o newton.exe
When I run the program newton.exe I get the error can't assign value INTENT(IN)::x to...
Hi,
I use scilab 5.2.2
Ik have a problem to find the zeros or roots of the bessel functions J0,J1...
Whel I write besselj(0,3) I get the value of the bessel function Jo(3)=0,2600520.
Can someone help me how to find the zeros of these bessel functions in scilab.
Thank you
kind...
Hi,
I need two simple proofs of complex inequalities.
1) |1-z|/|z|<2
2)|1+z|/|z|>1/2
Ik need them for a bound of a complex integral.It's not homework
Thank you
Hi,
problrm with complex integral.Consider the integral
\int_{0}^{\infty}\frac{(x^a-1)}{x^3-1}\,dx
use the branch 0<phi<3pi/2 and an idented contour at z=0 and z=1.(circular contour in the
upper half plane)
a)show that the integral can be written in terms of the integral...
Use of "Latex"
Hi,
I want to use Latex.I never heard about latex before.
If it runs on my computer:
1)Where can I download the files I need.
2)How to install
3)Where can I find the source code for writing the mathematical expressions.
My computer:
O.S/:Windows...
Hi,
can someone help me on a website for the classification of quadrics(ellipsoids,paraboloids,....) starting from the general second order equation.
Thanks
Hi,
I have a problem with the following complex integral.
Integral from 0 to+infinty sin²(a.lnz)/(x - 1)² = pi.a coth(2.pi.a) - 1/2 a>0
I tried different contours and methods,but without result.
Can you help me to find out the complex contour integration.
Thanks