1. The problem statement, all variables and given/known data Hi. I don't understand my results when I deconvolve two non-negative peaks. I also get a peak but it is fallowed by a negative "valley". Can devonvolution of two positive graphs give graphs with negative parts? 2. Relevant equations In this case I deconvole two gamma variates: f(t) = a(t-to)^b exp[ -(t-to)/c ] step(t-t0) g(t) = d(t-t1)^k exp[ -(t-t1)/m ] step(t-t1) 3. The attempt at a solution I use MATLAB's discrete fourier tranformation function and simply divide without filtering (what filter would I use? Is there noise in a sampled analytical function?) I've also tried changing sampling frequency and the window of the function = the negative dip stays there! I've also used Singular value decomposition to do the deconvolution- also I get a negative valley. Where does this come from? Does deconvoluion have a unique solution? thanks.