Results 111 to 120 of about 140,780 (247)

Chordal Graphs, Even‐Hole‐Free Graphs and Sparse Obstructions to Bounded Treewidth

open access: yesJournal of Graph Theory, Volume 110, Issue 3, Page 351-365, November 2025.
ABSTRACT Even‐hole‐free graphs pose a central challenge in identifying hereditary classes of bounded treewidth. We investigate this matter by presenting and studying the following conjecture: for an integer t ≥ 4 and a graph H, every even‐hole‐free graph of large enough treewidth has an induced subgraph isomorphic to either K t or H, if (and only if) H
Sepehr Hajebi
wiley   +1 more source

Saprotrophic Arachnopeziza Species as New Resources to Study the Obligate Biotrophic Lifestyle of Powdery Mildew Fungi

open access: yesMolecular Ecology Resources, Volume 25, Issue 8, November 2025.
ABSTRACT Obligate biotrophic plant pathogens like the powdery mildew fungi commit to a closely dependent relationship with their plant hosts and have lost the ability to grow and reproduce independently. Thus, at present, these organisms are not amenable to in vitro cultivation, which is a prerequisite for effective genetic modification and functional ...
Anne Loos   +7 more
wiley   +1 more source

Impact of Self-Loops on the Determinant of Graphs

open access: yesJournal of Mathematics
The current theoretical study intends to analyze the determinant of a certain class of graphs with self-loops. This study focuses on a vast unexplored area of adjacency matrices with nonzero diagonal entities.
Deekshitha V. A.   +3 more
doaj   +1 more source

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