Let's say you solve an equation and get the answer x = . This is fine in mathematics, but when you use the result to make a workpiece, you may need to cut the material to this length. In this case, it would be more realistic to get the answer 1.4142 m. In this way, even if the answer is given as a mathematical formula, the technique of trying to get the solution numerically is called numerical calculation. Also, for example, there is no way to solve an algebraic equation of degree 5 or higher if the coefficients are given arbitrarily, but by using numerical calculation, you can get an approximate solution that is close to the true solution. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
方程式を解いてx=という解を得たとしよう。数学ではこれでよいが,その結果を用いて何か工作物を作るとき,この長さに材料を切り取らなければならないことがある。このときはむしろ1.4142mという答を得るほうが現実的である。このように,たとえ数式として得られる場合でも,解を数値で得ようとする技法を数値計算という。また,たとえば5次以上の代数方程式は,係数が勝手に与えられる場合には解法がないが,数値計算を用いれば真の解に近い近似解が得られる。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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