Mon, 19 Jan 2009 17:39:25 +0900, David Cournapeau wrote: [clip] > norm=None): > N-1 > y[k] = x[0] + (-1)**k x[N-1] + 2 * sum x[n]*cos(pi*k*n/(N-1)) > n=0 This seems to be an use case for the math:: directive. Please use it, or make the previous line end with :: so that the text renders as preformatted text. Thanks, -- Pauli Virtanen