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The Longest Path Problem Is Polynomial on Interval Graphs

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  1. Article

    Open Access

    Algorithms and Almost Tight Results for \(3\) -Colorability of Small Diameter Graphs

    The \(3\) 3 ...

    George B. Mertzios, Paul G. Spirakis in Algorithmica (2016)

  2. Article

    Open Access

    The Complexity of Optimal Design of Temporally Connected Graphs

    We study the design of small cost temporally connected graphs, under various constraints. We mainly consider undirected graphs of n vertices, where each edge has an associated set of discrete availability instanc...

    Eleni C. Akrida, Leszek Gąsieniec, George B. Mertzios in Theory of Computing Systems (2017)

  3. Article

    Open Access

    Temporal Network Optimization Subject to Connectivity Constraints

    In this work we consider temporal networks, i.e. networks defined by a labeling \(\lambda \) ...

    George B. Mertzios, Othon Michail, Paul G. Spirakis in Algorithmica (2019)

  4. Article

    Open Access

    Binary Search in Graphs Revisited

    In the classical binary search in a path the aim is to detect an unknown target by asking as few queries as possible, where each query reveals the direction to the target. This binary search algorithm has been...

    Argyrios Deligkas, George B. Mertzios, Paul G. Spirakis in Algorithmica (2019)

  5. Article

    Open Access

    The Power of Linear-Time Data Reduction for Maximum Matching

    Finding maximum-cardinality matchings in undirected graphs is arguably one of the most central graph primitives. For m-edge and n-vertex graphs, it is well-known to be solvable in \(O(m\sqrt{n})\) O ( m n )

    George B. Mertzios, André Nichterlein, Rolf Niedermeier in Algorithmica (2020)

  6. Article

    Open Access

    Approximate and Randomized Algorithms for Computing a Second Hamiltonian Cycle

    In this paper we consider the following problem: Given a Hamiltonian graph G, and a Hamiltonian cycle C of G, can we compute a second Hamiltonian cycle ...

    Argyrios Deligkas, George B. Mertzios, Paul G. Spirakis, Viktor Zamaraev in Algorithmica (2024)