[HTML][HTML] Treewidth versus clique number. III. Tree-independence number of graphs with a forbidden structure

C Dallard, M Milanič, K Štorgel - Journal of Combinatorial Theory, Series B, 2024 - Elsevier
We continue the study of (tw, ω)-bounded graph classes, that is, hereditary graph classes in
which the treewidth can only be large due to the presence of a large clique, with the goal of …

Finding large induced sparse subgraphs in c>t -free graphs in quasipolynomial time

P Gartland, D Lokshtanov, M Pilipczuk… - Proceedings of the 53rd …, 2021 - dl.acm.org
For an integer t, a graph G is called C> t-free if G does not contain any induced cycle on
more than t vertices. We prove the following statement: for every pair of integers d and t and …

Maximum weight independent set in graphs with no long claws in quasi-polynomial time

P Gartland, D Lokshtanov, T Masařík… - Proceedings of the 56th …, 2024 - dl.acm.org
We show that the Maximum Weight Independent Set problem (MWIS) can be solved in quasi-
polynomial time on H-free graphs (graphs excluding a fixed graph H as an induced …

Induced subgraphs of bounded treewidth and the container method

T Abrishami, M Chudnovsky, M Pilipczuk… - SIAM Journal on …, 2024 - SIAM
A hole in a graph is an induced cycle of length at least 4. A hole is long if its length is at least
5. By, we denote a path on vertices. In this paper, we give polynomial-time algorithms for the …

Polynomial-time algorithm for maximum independent set in bounded-degree graphs with no long induced claws

T Abrishami, M Chudnovsky, C Dibek… - Proceedings of the 2022 …, 2022 - SIAM
For graphs G and H, we say that G is H-free if it does not contain H as an induced subgraph.
Already in the early 1980s Alekseev observed that if H is connected, then the Max Weight …

Quasi-polynomial time approximation schemes for the maximum weight independent set problem in H-free graphs

M Chudnovsky, M Pilipczuk, M Pilipczuk… - arXiv preprint arXiv …, 2019 - arxiv.org
In the Maximum Independent Set problem we are asked to find a set of pairwise
nonadjacent vertices in a given graph with the maximum possible cardinality. In general …

[HTML][HTML] Treewidth versus clique number. II. Tree-independence number

C Dallard, M Milanič, K Štorgel - Journal of Combinatorial Theory, Series B, 2024 - Elsevier
In 2020, we initiated a systematic study of graph classes in which the treewidth can only be
large due to the presence of a large clique, which we call (tw, ω)-bounded. The family of (tw …

Sparse induced subgraphs in P6-free graphs

M Chudnovsky, R McCarty, M Pilipczuk… - Proceedings of the 2024 …, 2024 - SIAM
We prove that a number of computational problems that ask for the largest sparse induced
subgraph satisfying some property definable in CMSO2 logic, most notably Feedback Vertex …

Max weight independent set in sparse graphs with no long claws

T Abrishami, M Chudnovsky, C Dibek… - arXiv preprint arXiv …, 2023 - arxiv.org
We revisit the recent polynomial-time algorithm for the MAX WEIGHT INDEPENDENT SET
(MWIS) problem in bounded-degree graphs that do not contain a fixed graph whose every …

Max weight independent set in graphs with no long claws: An analog of the gyárfás' path argument

K Majewski, T Masařík, J Masaříková… - ACM Transactions on …, 2024 - dl.acm.org
We revisit recent developments for the Maximum Weight Independent Set problem in graphs
excluding a subdivided claw S t, t, t as an induced subgraph and provide a subexponential …