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 Jul29 awarded Nice Question Jun21 comment Resource allocation with minimal differences Thank you for the answer. I suspected this might be an issue, hence the subquestion with the additional constraint. Any idea on a general construction in that case? Jun18 revised Resource allocation with minimal differences edited tags Jun17 asked Resource allocation with minimal differences Apr5 comment Cartesian products represented as disjoint unions Thanks for your answer. It got me thinking a little more, and I wonder now if I cannot get to $k{\cdot}n$, by representing $S$ as $((S_1 \setminus \{ s^1 \}) \times \ldots \times S_k) \cup (\{ s^1 \} \times \ldots \times S_k)$, then splitting $S_2$ in that second member, etc. In fact, I now suspect this could work for $S \setminus X$, where $X$ is an arbitrary Cartesian product from subsets of $S_1, \ldots, S_k$... Maybe someone can work a full answer, or I'll try myself. Apr4 asked Cartesian products represented as disjoint unions Oct3 comment Simplify a factorial @LuigiPlinge OK.. My colleague's whiteboard has the same sequence written all over it, complete with lots of little hand-drawn trees, that's why I was asking :) Also, for such things the On-Line Encyclopedia of Integer Sequences is a great resource. Oct2 comment Simplify a factorial Were you computing the possible arrangements of a commutative, non-associative, operator over n terms, by any chance? Sep26 comment Multiplications by unimodular matrices Simple as that. Thanks. Sep26 accepted Multiplications by unimodular matrices Sep26 asked Multiplications by unimodular matrices Sep8 revised How many $n\times m$ binary matrices are there, up to row and column permutations? deleted 19 characters in body Sep8 awarded Citizen Patrol Feb21 awarded Editor Feb21 revised Examples of apparent patterns that eventually fail formatting Feb21 suggested approved edit on Examples of apparent patterns that eventually fail Sep18 awarded Autobiographer Feb16 awarded Scholar Feb16 awarded Supporter Feb16 accepted How many $n\times m$ binary matrices are there, up to row and column permutations?