The concept of geometric-arithmetic indices was introduced in the chemical graph theory. These indices are defined by the following general formula:     ( ) 2 ( ) uv E G u v u v Q Q Q Q GA G , where Qu is some quantity that in a unique manner can be associated with the vertex u of graph G. In this paper the exact formula for two types of geometric-arithmetic index of Vphenylenic nanotube ar...

understanding cattle metabolism and its relationship with milk products is important in bovine breeding. a systemic view could lead to consequences that will result in a better understanding of existing concepts. topological indices and quantitative characterizations mostly result from the application of graph theory on biological data. in the present work, the enzyme network involved in cattle...

The first geometric-arithmetic index was introduced in the chemical theory as the summation of 2 du dv /(du  dv ) overall edges of the graph, where du stand for the degree of the vertex u. In this paper we give the expressions for computing the first geometric-arithmetic index of hexagonal systems and phenylenes and present new method for describing hexagonal system by corresponding a simple g...

Test case prioritization (TCP) techniques have been proven to be beneficial for improving testing activities. Prioritized test suites are found using different techniques of prioritization. While code coverage based prioritization techniques are found to be used by most scholars, test case prioritization based on UML behavioral models has not been given much attention so far. We propose a novel...

Prioritized logic programming has illustrated its rich expres-siveness and exibility in knowledge representation and reasoning. However , some important aspects of prioritized logic programs have yet to be thoroughly explored. In this paper, we investigate several properties of prioritized logic programs in the context of answer set semantics. Specifically , we propose a characterization on the...