不ふ定てい計けい量りょう空くう間かん

noun

indefinite metric space

A mathematical term from functional analysis and differential geometry. Refers to a space equipped with a metric that is not positive definite, allowing for null or negative distances.

• 不ふ定てい計けい量りょう空くう間かんは、一いっ般ぱん相そう対たい性せい理り論ろんの数すう学がく的てき基き礎そとしても重じゅう要ようである。

  Indefinite metric spaces are also important as a mathematical foundation for general relativity.