桁けた落おち

noun

cancellation of significant digits

Technical term in numerical analysis: loss of precision when subtracting two nearly equal numbers.

• 浮ふ動どう小しょう数すう点てん演えん算ざんでは、桁けた落おちに注ちゅう意いする必ひつ要ようがある。

  In floating-point arithmetic, one must be careful about cancellation of significant digits.