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1 vote
0 answers
17 views

Complexity of optimal cartesian matching

Question: what is known about the algorithmic aspects of optimally matching a set $\mathcal{P} = \prod\limits_{i=1}^n \left(1,\,\cdots,\,k_i\right)$ of grid-points to a set of $\prod\limits_{i=1}^...
3 votes
2 answers
336 views

Algorithm to evaluate "connectedness" of a binary matrix

I have the following problem: given an $m \times n$ binary matrix $A$ like e.g. the following $9 \times 39$ matrix: ...
2 votes
2 answers
112 views

Real-world datasets for testing the maximum edge bi-clique problem

We have proposed a new approach to solve the maximum edge bi-clique problem, however, we couldn't succeed to find real-world datasets (graph or bipartite graph datasets) to test our approach. Does ...
7 votes
1 answer
804 views

Combinatorial optimization problem for bipartite graphs

Let $G(V_1\cup V_2, E)$ be a simple bipartite graph having $n$ vertices and $m$ edges, such that $|V_1|=|V_2|$ (which implies that $n$ is an even number). Given any node $i \in V_1\cup V_2$, we denote ...
0 votes
1 answer
540 views

Best algorithm for meeting scheduling optimization so that total number of held meetings is minimized

Problem Description I want to hold meetings where some given number of people will participate. They have some vacant dates respectively but they don't have the same date on which all of them can ...
3 votes
1 answer
305 views

Partitioning vertex set to maximize weights of inter-class edges?

An interesting problem has come up in my work, and I haven't quite been able to find references to it so I thought I'd ask here. Suppose we have some complete, weighted graph with vertex set $V$. Is ...
1 vote
1 answer
163 views

An variation of an assignment problem in combinatorics: assign items to customers

Suppose we want to assign $n$ items to $m$ customers ($n \geq m$). Each assignment of an item $i$ to a customer $j$ has an associated cost $c(i,j)$. Find an assignment that maximizes the total cost. ...
0 votes
1 answer
140 views

Maximum partition of bipartite graph

Let $G = (U, V, E)$ be a bipartite graph. Let $w: E \to \mathbb{R}$ be a weight function on the edge set $E$. Given subsets $U_1,\ldots, U_k \subset U, U_i\cap U_j = \emptyset$ and a partition $V_1,\...
1 vote
0 answers
140 views

Is the partition of bipartite graphs NP-hard?

I wonder if the following problem is NP-hard. Is it? Given a bipartite graph $G = (U, V, E)$ with weights $w : E \to \mathbb{R}_+$, find a partition of $U$ into $U_1, U_2$ and nonempty disjoint ...