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Sep 15, 2015 at 17:27 comment added მამუკა ჯიბლაძე Related question here on MO with an answer by Richard Stanley
Aug 16, 2015 at 15:02 answer added Chip Eastham timeline score: 2
Aug 1, 2010 at 8:20 history edited Harun Šiljak CC BY-SA 2.5
clearing up the statement
Jul 25, 2010 at 21:26 comment added Harun Šiljak @András: looking it right now - but I don't see how a formula for combinations I'm looking for could directly follow from a formula for partitions given there?
Jul 25, 2010 at 20:22 comment added András Salamon Have you looked at Knuth's Volume 4 fascicle 3, in particular exercise 39 in section 7.2.1.4?
Jul 25, 2010 at 16:59 comment added Harun Šiljak Oh, sorry for not making it clear: a $k$-combination means simply picking k terms from the multiset (order not important). $k$-permutation is basically the same, but order is important. In the example above, the multiset is $\{m_1\cdot a_1, m_2\cdot a_2,\ldots,m_n\cdot a_n\}$, $a_i$ being the elements, $m_i$ being the multiplicities.
Jul 25, 2010 at 16:39 comment added Qiaochu Yuan I am not sure I understand what a k-combination or a k-permutation is.
Jul 25, 2010 at 12:32 history asked Harun Šiljak CC BY-SA 2.5