Re: Combination List
- To: mathgroup at smc.vnet.net
- Subject: [mg77993] Re: Combination List
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Thu, 21 Jun 2007 05:37:16 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <f55qci$k58$1@smc.vnet.net> <f58bk7$6ve$1@smc.vnet.net> <f5arsg$9aq$1@smc.vnet.net>
Bruno Campanini wrote: > "Jean-Marc Gulliet" <jeanmarc.gulliet at gmail.com> wrote in message > news:f58bk7$6ve$1 at smc.vnet.net... > >> I believe the last line is a typo (otherwise your request does not make >> any sense). > > Yes it is. > Thank you Jean-Marc and thanks to the other fellows. > I got a number of good solutions to my question. > > May I go on... > What if I can have one or more repeated elements in subsets? > That is the number of combinations of 3 elements out of 4 > - with one or more duplicated elements - is Binomial[4+3-1,3] = 20 > > How can I get the list? > > Bruno > You should investigate the package Combinatorica. For instance, from the documentation center Combinatorica/tutorial/Combinatorica or from the web http://reference.wolfram.com/mathematica/Combinatorica/tutorial/Combinatorica.html is a good place to start with it. Regards, Jean-Marc