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accumulation point

point d’accumulation

accumulation point noun

  • (topology, "of" a subset of a topological space) Given a subset S of a topological space X, a point x whose every neighborhood contains at least one point distinct from x that belongs to S.
  • (analysis, "of" a sequence) Given a sequence si, a point x whose every neighborhood contains at least one element of the sequence distinct from x.
 point d'accumulation
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