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Fungrim entry: 4b4816

B0=#{{{}}}=1B_{0} = \# \left\{\left\{\left\{\right\}\right\}\right\} = 1
Fungrim symbol Notation Short description
BellNumberBnB_{n} Bell number
Cardinality#S\# S Set cardinality
Source code for this entry:
    Equal(BellNumber(0), Cardinality(Set(Set(Set()))), 1))

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2021-03-15 19:12:00.328586 UTC