不ふ定てい形けい

noun

indeterminate form

Technical term in mathematics and logic for an expression whose value is not determined, such as 0/0 or ∞−∞.

• この極きょく限げんは不ふ定てい形けいなので、ロピタルの定てい理りを使つかう必ひつ要ようがある。

  This limit is an indeterminate form, so we need to use L'Hôpital's rule.

noun which may take the genitive case particle 'no'

undefined; indefinite; unstructured; amorphous

Describes something lacking a fixed shape, clear definition, or stable structure; can apply to abstract concepts, plans, or physical forms.

• プロジェクトの計けい画かくはまだ不ふ定てい形けいで、具ぐ体たい的てきなスケジュールは決きまっていない。

  The project plan is still undefined, and no concrete schedule has been set.

• 不ふ定てい形けいな粘ねん土どをこねて、好すきな形かたちを作つくった。

  I kneaded the amorphous clay and made a shape I liked.