Bifalgorithm post · Brisk · Chapter 1

What is a power set?

What is a power set? (Brisk · Chapter 1) — "Power set is a curious name for a simple concept. We talk about the power set “of” another set, which is the set of…

Ideas in this flowchart

  • La puissance d’un ensemble est l’ensemble de tous ses sous-ensembles.
  • La puissance de A contient tous les sous-ensembles de A.
  • La puissance de A se note P(A).
  • On considère l’ensemble A = { Dad, Lizzy }.
  • La puissance de A est P(A) = { { Dad, Lizzy }, { Dad }, { Lizzy }, ∅ }.
  • La puissance de A contient quatre éléments.
  • Chacun de ces quatre éléments est l’un des sous-ensembles possibles de A.
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What is a power set?

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Brisk

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"Power set is a curious name for a simple concept. We talk about the power set “of” another set, which is the set of all subsets of that other set. Example: suppose A = { Dad, Lizzy }. Then the power set of A, which is written as “P(A)” is: { { Dad, Lizzy }, { Dad }, { Lizzy }, ∅ }. There are four elements to the power set of A, each of which is one of the possible subsets."

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