🌐日本語EnglishEspañolPortuguêsРусский中文日本語EntityQ844451· pop 12· linked from 87 articles孤立点 (特異点)thumb|right|An acnode at the origin (curve described in text)Available in 12 languagesEspañol中文РусскийPortuguêsBosnianEsperantoIrishRomanianSerbian (Latin)SlovenianUkrainianConnectionsalgebraic curveEntityRiemann surfaceEntityCategoriesAlgebraic curvesCurvesSingularity theory