# Talk:Richardson extrapolation

Sure there's a countable sequence there. Though the theoretical underpinnings may look at limits as a real-valued parameter changes, Richardson extrapolation is a computational method, and it looks at sequences. Typically one looks at the value of the limiting expression at a sequence of parameter values such as $h_0, h_0/2, h_0/4, h_0/8, \ldots$. Lunch (talk) 20:33, 11 June 2008 (UTC)