1. Trivial topologyIn topology, a topological space with the trivial topology is one where the only open sets are the empty set and the entire space. Such a space is sometimes called an indiscrete space, and its topology sometimes called an indiscrete topology. Intuitively, this has the consequence that all points of the space are "lumped together" and cannot be distinguished by topological means; it belongs to a pseudometric space in which the distance between any two points is zero.
Read “Trivial topology” on English Wikipedia
Read “密着空間” on Japanese Wikipedia
Read “Trivial topology” on DBpedia
Read “Trivial topology” on English Wikipedia
Read “密着空間” on Japanese Wikipedia
Read “Trivial topology” on DBpedia
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