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arxiv: 1601.00943 · v2 · pith:MYABKTCAnew · submitted 2016-01-05 · 🧮 math.CO

Representation of large matchings in bipartite graphs

classification 🧮 math.CO
keywords bipartiteeveryfracmatchingsaharonibergerbrualdiclemens
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Let $f(n)$ be the smallest number such that every collection of $n$ matchings, each of size at least $f(n)$, in a bipartite graph, has a full rainbow matching. Generalizing famous conjectures of Ryser, Brualdi and Stein, Aharoni and Berger conjectured that $f(n)=n+1$ for every $n>1$. Clemens and Ehrenm{\"u}ller proved that $f(n) \le \frac{3}{2}n +o(n)$. We show that the $o(n)$ term can be reduced to a constant, namely $f(n) \le \lceil \frac{3}{2}n \rceil+1$.

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