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Re: power set (Re: Modified keypad keys)
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From: |
Christopher Monsanto |
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Subject: |
Re: power set (Re: Modified keypad keys) |
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Date: |
Mon, 1 Oct 2012 04:35:42 -0400 |
The powerset is a set of sets. The empty set is always a member of the
powerset, as the empty set is a subset of any other set. Or in other
words, if (length (powerset ...)) is ever zero, you have a bug. Using
'() or nil is incorrect.
Christopher Monsanto
address@hidden -- http://monsan.to/