Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: complicated equation including bessel functions
Replies: 22   Last Post: May 8, 2013 2:43 PM

 Messages: [ Previous | Next ]
 ghasem Posts: 118 Registered: 4/13/13
Re: complicated equation including bessel functions
Posted: May 8, 2013 10:39 AM

> I give you a simple example
>
> instead of solving z complex for
> z^2 = 5 + 12i,
>
> Try to solve (x,y) in R^2 so that
> real((x+1i*y)^2) = 5
> imag((x+1i*y)^2) = 12;
> using FSOLVE().
>
> Then your complex solution is z = x + 1i*y.
>
> Bruno

==========================
I know Bruno,But where of this example,is related to my question?
I tell again,when you use from real and imag commands for y=bessel(x) functions with complex argument,only matlab return:
real(y) = y+conj(y)
imag(y) = y-conj(y)
But,the problem is same,and you can not separate complex argument in bessel function.
for other example:
syms a b
c = a+1j*b;
d = besseli(1,c)
d =
besseli(1, a + b*i)
% now:
real(d)
ans=
conj(besseli(1, a + b*i))/2 + besseli(1, a + b*i)/2
imag(d)
ans =
(conj(besseli(1, a + b*i))*i)/2 - (besseli(1, a + b*i)*i)/2

you can see the problem is same,and only become longer.
ghasem

Date Subject Author
5/7/13 ghasem
5/8/13 ghasem
5/8/13 Torsten
5/8/13 Bruno Luong
5/8/13 Torsten
5/8/13 ghasem
5/8/13 Bruno Luong
5/8/13 ghasem
5/8/13 Nasser Abbasi
5/8/13 Bruno Luong
5/8/13 ghasem
5/8/13 Torsten
5/8/13 ghasem
5/8/13 Torsten
5/8/13 Bruno Luong
5/8/13 ghasem
5/8/13 Bruno Luong
5/8/13 ghasem
5/8/13 Steven Lord
5/8/13 ghasem
5/8/13 Steven Lord
5/8/13 ghasem
5/8/13 ghasem