Introduction - If you have any usage issues, please Google them yourself
error analysis by a number of means, for example, Granville point Morrison (J. H. Wilkison), referring to a computer's floating-point operations "backward error analysis," This is a priori estimation error method, compared to the previous "Forward Error Analysis" in the matrix computation Rounding error a better estimate on the results of a matrix so the error analysis of a breakthrough in the progress, many with forward error analysis difficult to determine the reliability of numerical methods to achieve new progress.