Author

Sharareh Alipour

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Preprint Sep 2026

Remote Matching: Exact-Cardinality Approximation and Tight UGC Hardness

In the unrestricted max--min metric $T$-join problem, one seeks an even terminal set $T$ maximizing the cost of a minimum $T$-join. Iwata and Ravi gave a factor-$3/2$ approximation for this problem. We show that this guarantee is tight under the Unique Games Conjecture: no polynomial-time approximation with factor stri...

A. Ahadi, Morteza Alimi, Sharareh Alipour et al. · 0 citations

Preprint Sep 2026

Multiset Colorings of Random Graphs Across Density Regimes

We show that almost every graph admits a partition of its vertex set into three parts such that no two adjacent vertices have the same number of neighbors in each of the three parts. Equivalently, for $G\sim G(n,1/2)$, $\chi_m(G)\le3$ with high probability, improving the previously known bound of five. Here $\chi_m(G)$...

A. Ahadi, Sharareh Alipour · 0 citations