Bifalgorithm post · Brisk · Chapter 1

How is cardinality written using mathematical notation?

How is cardinality written using mathematical notation? (Brisk · Chapter 1) — "The notation we use for cardinality is vertical bars, like with absolute value.…

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  • Cardinality is represented using vertical bars.
  • The notation resembles absolute value notation.
  • For a set M, cardinality is written as |M| = 3.
  • The empty set has cardinality |∅| = 0.
  • The cardinality of the set containing the empty set is written |{∅}| =
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How is cardinality written using mathematical notation?

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Brisk

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"The notation we use for cardinality is vertical bars, like with absolute value. So we write: | M | = 3. To restate the example immediately above, | ∅ | = 0, but |{ ∅ }| ="

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