noun
isolated singularity
In complex analysis, a point where a function is not analytic but is analytic in a punctured neighborhood around it.
関数 f(z) は z=0 に孤立特異点を持つ。
The function f(z) has an isolated singularity at z=0.
特異点 is a general term for any singularity, while 孤立特異点 specifically refers to an isolated one.
Compound of 孤立 (isolated) and 特異点 (singularity), a direct translation of the English mathematical term.