Over the last two decades the world economy has dramatically transformed, with strategic alliances and partnerships across industrial and global boundaries becoming an important means to maintaining and regaining competitive positioning. In spite of an increase in partnership activity, alliances continue to face problems fuelled by factors such as partner opportunism, and cultural incompatibili...

Information technology-based alliances are rapidly spreading in organizations, which calls upon researchers to develop an adequate theoretical lens to examine this phenomenon and its key associated outcomes, such as the business performance of alliance firms. However, strategic alliances are mostly examined from a transaction cost economics perspective, and the results on performance are inconc...

A set S of vertices a graph is defensive alliance if, for each element , the majority its neighbours are in . We study parameterised complexity Defensive Alliance where aim to find minimum size alliance. Our main results following: (1) has been studied extensively during last twenty years, but question whether it FPT when by feedback vertex still remained open. prove that problem W[1]-hard wide...

The odds of a current syndicate relationship between two lenders depend upon their previous alliances. The odds are significantly higher [lower] and strongest for a current lead–participant relationship with a continuation [reversal] of their previous roles. To illustrate, the odds are nearly four times higher when two lenders have allied in the previous 5 years. The strength of lead–participan...

We consider complexity issues and upper bounds for defensive alliances and strong global offensive alliances in graphs. We prove that it is NP-complete to decide for a given 6-regular graph G and a given integer a, whether G contains a defensive alliance of order at most a. Furthermore, we prove that determining the strong global offensive alliance number γô(G) of a graph G is APX-hard for cubi...

A molecular phylogenetic analysis of the tribe Malveae (subfamily Malvoideae, Malvaceae) was undertaken using the internal transcribed spacer region of the 18S-26S nuclear ribosomal repeat (ITS). This work represents the first exhaustive study to evaluate the infratribal circumscription and generic affinities using molecular sequence data. The ITS phylogeny indicates that the informal tribal al...