一いち意い的てき

na-adjective

unique; one-to-one; unambiguous

Used in mathematics, logic, and formal contexts to describe a mapping, solution, or interpretation that is uniquely determined. Not a general-purpose word for 'unique' in the sense of 'special' or 'unusual'.

• この方ほう程てい式しきには一いち意い的てきな解かいが存そん在ざいする。

  This equation has a unique solution.

• 写しゃ像ぞうが一いち意い的てきであることを証しょう明めいせよ。

  Prove that the mapping is one-to-one.