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Papers by Dan Lu

Research paper thumbnail of The Zero-divisor Graphs of Posets and an Application to Semigroups

Graphs and Combinatorics, 2010

In this paper, we introduce the notion of a compact graph. We show that a simple graph is a compa... more In this paper, we introduce the notion of a compact graph. We show that a simple graph is a compact graph if and only if G is the zero-divisor graph of a poset, and give a new proof of the main result in Halaš and Jukl (Discrete Math 309:4584–4589, 2009) stating that if G is the zero-divisor graph of a

Research paper thumbnail of The Zero-divisor Graphs of Posets and an Application to Semigroups

Graphs and Combinatorics, 2010

In this paper, we introduce the notion of a compact graph. We show that a simple graph is a compa... more In this paper, we introduce the notion of a compact graph. We show that a simple graph is a compact graph if and only if G is the zero-divisor graph of a poset, and give a new proof of the main result in Halaš and Jukl (Discrete Math 309:4584–4589, 2009) stating that if G is the zero-divisor graph of a

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