Bell numbers: Difference between revisions
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: '''B<sub>0</sub> = 1''' trivially. There is only one way to partition a set with zero elements: '''{ }''' |
: '''B<sub>0</sub> = 1''' trivially. There is only one way to partition a set with zero elements: '''{ }''' |
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: '''B<sub>1</sub> = 1''' There is only one way to partition a set with one element: '''{a}''' |
: '''B<sub>1</sub> = 1''' There is only one way to partition a set with one element: '''{a}''' |