Open Access
April 2022 Edge ideals of squares of trees
Anda Olteanu
Author Affiliations +
Osaka J. Math. 59(2): 369-386 (April 2022).


We describe all the trees with the property that the corresponding edge ideal of the square of the tree has a linear resolution. As a consequence, we give a complete characterization of those trees $T$ for which the square is co-chordal, that is the complement of the square, $(T^2)^c$, is a chordal graph. For particular classes of trees such as paths and double brooms, we determine the Krull dimension and the projective dimension.


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Anda Olteanu. "Edge ideals of squares of trees." Osaka J. Math. 59 (2) 369 - 386, April 2022.


Received: 9 July 2020; Revised: 2 February 2021; Published: April 2022
First available in Project Euclid: 7 April 2022

MathSciNet: MR4405984
zbMATH: 1487.05280

Primary: 13A02
Secondary: 05E40

Rights: Copyright © 2022 Osaka University and Osaka City University, Departments of Mathematics

Vol.59 • No. 2 • April 2022
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