One of the simplest such replacements was proposed by L F Richardson in 1910. Richardson 's method yielded a numerical solution which was very easy to compute, but alas was numerically unstable and thus useless.
Isa sa mga pinakamadaling tulad ng replacements ay iminungkahi ng LF Richardson sa 1910. Richardson 's paraan yielded ng isang de-numerong solusyon na kung saan ay tunay madali sa compute, ngunit Alas ay ayon sa bilang mahina at kaya walang kasaysayan.