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In the mathematical field of topology, a hyperconnected space or irreducible space is a topological space X that cannot be written as the union of two proper closed sets (whether disjoint or non-disjoint). The name irreducible space is preferred in algebraic geometry. For a topological space X the following conditions are equivalent: A space which satisfies any one of these conditions is called hyperconnected or irreducible. Due to the condition about neighborhoods of distinct points being in a sense the opposite of the Hausdorff property, some authors call such spaces anti-Hausdorff.

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  • Der Begriff des irreduziblen topologischen Raumes gehört zum mathematischen Teilgebiet der mengentheoretischen Topologie, findet jedoch hauptsächlich in der algebraischen Geometrie Anwendung. (de)
  • In the mathematical field of topology, a hyperconnected space or irreducible space is a topological space X that cannot be written as the union of two proper closed sets (whether disjoint or non-disjoint). The name irreducible space is preferred in algebraic geometry. For a topological space X the following conditions are equivalent: * No two nonempty open sets are disjoint. * X cannot be written as the union of two proper closed sets. * Every nonempty open set is dense in X. * The interior of every proper closed set is empty. * Every subset is dense or nowhere dense in X. * No two points can be separated by disjoint neighbourhoods. A space which satisfies any one of these conditions is called hyperconnected or irreducible. Due to the condition about neighborhoods of distinct points being in a sense the opposite of the Hausdorff property, some authors call such spaces anti-Hausdorff. An irreducible set is a subset of a topological space for which the subspace topology is irreducible. Some authors do not consider the empty set to be irreducible (even though it vacuously satisfies the above conditions). (en)
  • En Topología (rama de la Matemática), un espacio topológico es hiperconexo si no es unión de dos subconjuntos cerrados propios. (es)
  • En topologie, un espace irréductible est un espace topologique non vide qui ne peut pas se décomposer en (c'est-à-dire s'écrire comme réunion de) deux parties fermées strictement plus petites. Ce type d'espaces apparaît (et est utilisé) surtout en géométrie algébrique, où l'irréductibilité est une des propriétés topologiques basiques. (fr)
  • 대수기하학과 일반위상수학에서 기약 공간(旣約空間, 영어: irreducible space) 또는 초연결 공간(超連結空間, 영어: hyperconnected space)은 대수다양체의 자리스키 위상과 같이, 두 닫힌 진부분 집합의 합집합으로 나타낼 수 없는 위상 공간이다. (ko)
  • 位相幾何学において、既約空間(きやくくうかん、英: irreducible space, hyperconnected space)とは、空でない位相空間であって、2つの真閉部分集合に分解されない(すなわち和集合として書けない)ようなものである。この空間はとりわけ既約性が基本的な位相的性質の1つである代数幾何学において現れて役に立つ。 (ja)
  • Przestrzeń nieprzywiedlna – niepusta przestrzeń topologiczna w której każda para niepustych zbiorów otwartych ma niepustą część wspólną. (pl)
  • Na topologia, um espaço topológico é hiperconectado se não é a união de dois subconjuntos propriamente entrelaçados. (pt)
  • Гіперзв'я́зний про́стір — топологічний простір, який не містить дві непорожні неперетинні відкриті множини. (uk)
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  • Hyperconnected space (en)
dbp:urlname
  • HyperconnectedSpace (en)
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  • Der Begriff des irreduziblen topologischen Raumes gehört zum mathematischen Teilgebiet der mengentheoretischen Topologie, findet jedoch hauptsächlich in der algebraischen Geometrie Anwendung. (de)
  • En Topología (rama de la Matemática), un espacio topológico es hiperconexo si no es unión de dos subconjuntos cerrados propios. (es)
  • En topologie, un espace irréductible est un espace topologique non vide qui ne peut pas se décomposer en (c'est-à-dire s'écrire comme réunion de) deux parties fermées strictement plus petites. Ce type d'espaces apparaît (et est utilisé) surtout en géométrie algébrique, où l'irréductibilité est une des propriétés topologiques basiques. (fr)
  • 대수기하학과 일반위상수학에서 기약 공간(旣約空間, 영어: irreducible space) 또는 초연결 공간(超連結空間, 영어: hyperconnected space)은 대수다양체의 자리스키 위상과 같이, 두 닫힌 진부분 집합의 합집합으로 나타낼 수 없는 위상 공간이다. (ko)
  • 位相幾何学において、既約空間(きやくくうかん、英: irreducible space, hyperconnected space)とは、空でない位相空間であって、2つの真閉部分集合に分解されない(すなわち和集合として書けない)ようなものである。この空間はとりわけ既約性が基本的な位相的性質の1つである代数幾何学において現れて役に立つ。 (ja)
  • Przestrzeń nieprzywiedlna – niepusta przestrzeń topologiczna w której każda para niepustych zbiorów otwartych ma niepustą część wspólną. (pl)
  • Na topologia, um espaço topológico é hiperconectado se não é a união de dois subconjuntos propriamente entrelaçados. (pt)
  • Гіперзв'я́зний про́стір — топологічний простір, який не містить дві непорожні неперетинні відкриті множини. (uk)
  • In the mathematical field of topology, a hyperconnected space or irreducible space is a topological space X that cannot be written as the union of two proper closed sets (whether disjoint or non-disjoint). The name irreducible space is preferred in algebraic geometry. For a topological space X the following conditions are equivalent: A space which satisfies any one of these conditions is called hyperconnected or irreducible. Due to the condition about neighborhoods of distinct points being in a sense the opposite of the Hausdorff property, some authors call such spaces anti-Hausdorff. (en)
rdfs:label
  • Irreduzibler topologischer Raum (de)
  • Espacio hiperconexo (es)
  • Hyperconnected space (en)
  • Espace topologique irréductible (fr)
  • 기약 공간 (ko)
  • 既約位相空間 (ja)
  • Przestrzeń nieprzywiedlna (pl)
  • Espaço hiperconectado (pt)
  • Гіперзв'язний простір (uk)
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