# Cuyrious sum

1. Feb 15, 2004

### eljose79

Let be the expresion

[x]=integer part of x =L**-1R(s) with:

R(s)=2/s**2-1/1-exp(-s) then let,s put x=f(t) so

[f(t)]=1/2Pi*iInt(c+i8,c-i8)R(s)exp(sf(t)) is that correct?...

then for the sum for t=1 to t=N we would have:

Sum(1,N)[f(t)]=1/2Pi*iInt(c+i8,c-i8)R(s)Sum(1,N)exp(sf(t)) where the sum is for t..

with that i have given an expresion to get the sums of the form

Sumn(1,N)[f(t)]

2. Feb 15, 2004

### matt grime

Serveral things spring to mind, such as, what does ** mean, can you put some brackets in to make it clear what's going on, please tex if possible, where have those limits for the integral come from, in fact where's the integral come from (it's wrong to say that a function equals its fourier exapansion if that's where it comes from). In short, how about some more details?