Equations that contain quadratic or higher terms, and functional equations, differential equations, and integral equations for unknown functions. It is usually difficult to obtain an exact solution. In some cases, it is possible to convert them to linear equations and find the solution by performing appropriate variable transformations or variable separation. Source: About Shogakukan Digital Daijisen Information | Legend |
2次以上の項を含む方程式、および未知関数についての関数方程式・微分方程式・積分方程式。通常、厳密解を得ることが困難な場合が多い。一部、適切な変数変換や変数分離を行うことによって線形方程式に移行し、解を求めることができる。
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