Weak Integer Additive Set-Indexers of Certain Graph Products
Sudev Naduvath, K. A. Germina
Abstract
Sudev Naduvath, K. A. Germina
Abstract
Let N0 be the set of all non-negative integers and P(N0) be its power set. An integer additive set-indexer (IASI) is defined as an injective function f: V (G) → P(N0) such that the induced function f+: E(G) → P(N0) defined by f+(uv) = f(u) + f(v) is also injective, where f(u) + f(v) is the sumset of f(u) and f(v). An IASI f is said to be a weak IASI if |f+(uv) | = max(|f(u)|, |f(v)|) ∀ uv ∈ E(G). In this paper, we study the admissibility of weak IASI by certain graph products of two weak IASI graphs. Key Words: Integer additive set-indexers, mono-indexed elements of a graph, weak integer additive set-indexers, sparing number of a graph. AMS Subject Classification: 05C78 1
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Let N0 be the set of all non-negative integers and P(N0) be its power set. An integer additive set-indexer (IASI) is defined as an injective function f: V (G) → P(N0) such that the induced function f+: E(G) → P(N0) defined by f+(uv) = f(u) + f(v) is also injective, where f(u) + f(v) is the sumset of f(u) and f(v). An IASI f is said to be a weak IASI if |f+(uv) | = max(|f(u)|, |f(v)|) ∀ uv ∈ E(G). In this paper, we study the admissibility of weak IASI by certain graph products of two weak IASI graphs. Key Words: Integer additive set-indexers, mono-indexed elements of a graph, weak integer additive set-indexers, sparing number of a graph. AMS Subject Classification: 05C78 1
Key concepts: Injective function, Graph, Combinatorics, Integer (computer science), Power set, Mathematics, Function (biology), Set (abstract data type)