オイラーの等とう式しきMeanings1expression, nounEuler's identity; Euler's equationmathematics›Mathematical term referring to the equation e^(iπ) + 1 = 0, often celebrated for its beauty.オイラーの等とう式しきは数すう学がくで最もっとも美うつくしい式しきの一ひとつと言いわれる。Euler's identity is said to be one of the most beautiful equations in mathematics.