About: Appert topology

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In general topology, a branch of mathematics, the Appert topology, named for Antoine Appert, is a topology on the set X = {1, 2, 3, ...} of positive integers.In the Appert topology, the open sets are those that do not contain 1, and those that asymptotically contain almost every positive integer. The space X with the Appert topology is called the Appert space.

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  • In general topology, a branch of mathematics, the Appert topology, named for Antoine Appert, is a topology on the set X = {1, 2, 3, ...} of positive integers.In the Appert topology, the open sets are those that do not contain 1, and those that asymptotically contain almost every positive integer. The space X with the Appert topology is called the Appert space. (en)
  • Przestrzeń Apperta – kontrprzykład w topologii ogólnej, przykład przeliczalnej przestrzeni topologicznej, która jest całkowicie normalna, ale nie jest przeliczalnie zwarta, nie spełnia pierwszego aksjomatu przeliczalności ani nie jest lokalnie zwarta. (pl)
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  • In general topology, a branch of mathematics, the Appert topology, named for Antoine Appert, is a topology on the set X = {1, 2, 3, ...} of positive integers.In the Appert topology, the open sets are those that do not contain 1, and those that asymptotically contain almost every positive integer. The space X with the Appert topology is called the Appert space. (en)
  • Przestrzeń Apperta – kontrprzykład w topologii ogólnej, przykład przeliczalnej przestrzeni topologicznej, która jest całkowicie normalna, ale nie jest przeliczalnie zwarta, nie spełnia pierwszego aksjomatu przeliczalności ani nie jest lokalnie zwarta. (pl)
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  • Appert topology (en)
  • Przestrzeń Apperta (pl)
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