A Bound for the Regularity of Powers of Edge Ideals

A Bound for the Regularity of Powers of Edge Ideals Let G be a graph which has no odd cycle of length at most $$2k-1$$ 2 k - 1 ( $$k\ge 2$$ k ≥ 2 ). Assume that I(G) is the edge ideal of G. We prove $$\mathrm{reg}(I(G)^s) \le 2s+$$ reg ( I ( G ) s ) ≤ 2 s + co-chord $$(G)-1$$ ( G ) - 1 , for every integer s with $$1\le s\le k-1$$ 1 ≤ s ≤ k - 1 . Moreover, we show that if G has no odd cycle of lengths 3 and 5, then I(G) has a linear presentation if and only if $$G^c$$ G c is a chordal graph. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the Iranian Mathematical Society Springer Journals

A Bound for the Regularity of Powers of Edge Ideals

, Volume 44 (3) – Jun 4, 2018
5 pages

/lp/springer_journal/a-bound-for-the-regularity-of-powers-of-edge-ideals-FEf9V0ZMQf
Publisher
Springer Journals
Subject
Mathematics; Mathematics, general
ISSN
1017-060X
eISSN
1735-8515
D.O.I.
10.1007/s41980-018-0038-5
Publisher site
See Article on Publisher Site

Abstract

Let G be a graph which has no odd cycle of length at most $$2k-1$$ 2 k - 1 ( $$k\ge 2$$ k ≥ 2 ). Assume that I(G) is the edge ideal of G. We prove $$\mathrm{reg}(I(G)^s) \le 2s+$$ reg ( I ( G ) s ) ≤ 2 s + co-chord $$(G)-1$$ ( G ) - 1 , for every integer s with $$1\le s\le k-1$$ 1 ≤ s ≤ k - 1 . Moreover, we show that if G has no odd cycle of lengths 3 and 5, then I(G) has a linear presentation if and only if $$G^c$$ G c is a chordal graph.

Journal

Bulletin of the Iranian Mathematical SocietySpringer Journals

Published: Jun 4, 2018

DeepDyve is your personal research library

It’s your single place to instantly
that matters to you.

over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month Explore the DeepDyve Library Search Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly Organize Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place. Access Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals. Your journals are on DeepDyve Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more. All the latest content is available, no embargo periods. DeepDyve Freelancer DeepDyve Pro Price FREE$49/month
\$360/year

Save searches from
PubMed

Create lists to

Export lists, citations