Bifalgorithm post · Brisk · Chapter 1

What is the difference between ∅ and {∅}?

What is the difference between ∅ and {∅}? (Brisk · Chapter 1) — "As a corollary to this, there’s a difference between ∅ and { ∅ } . The former is a set with no…

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Difference between ∅ and {∅}
∅ is a set with no elements.
The set contains nothing.
{∅} is a set with one element.
Its single element is ∅.
That element is itself a set with nothing in it.

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What is the difference between ∅ and {∅}?

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"As a corollary to this, there’s a difference between ∅ and { ∅ } . The former is a set with no elements. The latter is a set with one element: and that element just happens to be a set with nothing in it."

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