23 Mar
2000
23 Mar
'00
9:07 p.m.
On Wed, 22 Mar 2000, Jean-Bernard Addor wrote:
Hey Numpy people!
I have to integrate functions like:
Int_0^1 (t*(t-1))**-(H/2) dt
This is a beta function with arguments (1-H/2,1-H/2) and is related to gamma functions. B(x,y) = Gamma(x)Gamma(y)/Gamma(x+y)
or
Int_-1^1 1/abs(t)**(1-H) dt, with H around .3
This can be can done analytically = 2 Int_0^1 t**(H-1) dt = 2 [ t**(H)/H ]_0^1 = 2/H
I just tried quadrature on the 1st one: it needs very order of quadrature to be precise and is in that case slow.
HTH Peter