pith. sign in

arxiv: 1702.03472 · v1 · pith:CTCSABFMnew · submitted 2017-02-12 · 🧮 math.CO

Fully-projected subsets

classification 🧮 math.CO
keywords fully-projectedldotssubsetstimesalternatingaxesballballs
0
0 comments X
read the original abstract

Let $k$ and $i_1,\ldots,i_n$ be natural numbers. Place $k$ balls into a multidimensional box of $i_1\times\cdots \times i_n$ cells, no more than one ball to each cell, such that the projections to each of the coordinate axes have cardinalities $i_1,\ldots,i_n$, respectively. We generalize earlier work of Wang, Lee, and Tan to find a formula for the alternating sum of the number of these fully-projected subsets.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.