孤こ立りつ特とく異い点てん

noun

isolated singularity

In complex analysis, a point where a function is not analytic but is analytic in a punctured neighborhood around it.

• この関かん数すうは原げん点てんに孤こ立りつ特とく異い点てんを持もつ。

  This function has an isolated singularity at the origin.