Re: Listing the partitions of a set
- To: mathgroup at smc.vnet.net
- Subject: [mg65313] Re: [mg65282] Listing the partitions of a set
- From: Pratik Desai <pratikd at wolfram.com>
- Date: Sat, 25 Mar 2006 05:17:52 -0500 (EST)
- References: <200603240559.AAA26153@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Richard Palmer wrote:
> Is there a simple way to list the partitions of a set? For example, there
> are 15 partitions on a set of 4 elements. {{{1, 2, 3, 4}}, {1, {2, 3, 4}},
> {{1, 3, 4}, 2}, {{1, 2, 4}, 3}, {{1, 2, 3}, 4}, {{1, 2}, {3, 4}}, {{1,
> 3}, {2, 4}}, {{1, 4}, {2, 3}}, {1, 2, {3, 4}}, {1, 3, {2, 4}}, {1, 4, {2,
> 3}}, {2, 3, {1, 4}}, {2, 4, {1, 3}}, {3, 4, {1, 2}}, {1, 2, 3, 4}} .
>
>
Here is a link for a site where there is an implementation of the Bell
List (which I hope does what you want)
http://mathforum.org/advanced/robertd/bell.html
Hope this helps
Pratik Desai
Wolfram Research
Tech Support
- References:
- Listing the partitions of a set
- From: Richard Palmer <mapsinc@bellatlantic.net>
- Listing the partitions of a set