In this paper, we unfold balanced and totally balanced neighborhood hypergraphs to discover new classes of normally torsion-free monomial ideals. As a consequence, we establish that the closed neighborhood ideals and the dominating ideals of strongly chordal graphs are normally torsion-free. We discuss the stable sets of associated primes of the dominating ideals of cycles and characterize all the cycles with normally torsion-free dominating ideals.
机构:
Northwest Normal Univ, Coll Math & Stat, Lanzhou 730070, Gansu, Peoples R China
Northwest Minzu Univ, Coll Math & Comp Sci, Lanzhou 730030, Gansu, Peoples R ChinaNorthwest Normal Univ, Coll Math & Stat, Lanzhou 730070, Gansu, Peoples R China
Wang, Qian
Gong, Zengtai
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机构:
Northwest Normal Univ, Coll Math & Stat, Lanzhou 730070, Gansu, Peoples R ChinaNorthwest Normal Univ, Coll Math & Stat, Lanzhou 730070, Gansu, Peoples R China