# can someone identify this

• December 22nd 2008, 12:11 PM
william
can someone identify this
$R_n(x)=\frac{1}{2\pi i} \int_C \frac{f(z)}{(z-a)^{n-1}(z-x)} dz$

What is this and what is it used for?
• December 24th 2008, 03:11 PM
Jameson
It's a formula dealing with the remainder term in a complex Taylor Series.

Look at this Wikipedia entry - Taylor's theorem - Wikipedia, the free encyclopedia