摘要: The bow-tie structure is frequently cited in the literature of World Wide Web and many other areas, such as metabolic networks, but it has never been precisely defined, so that to some extent concept being discussed remains vague. This paper first provides a formal definition relative given strongly connected components. That details distinctions which are not usually made, difference between intendrils outtendrils. Theorems algorithms then provided justify support definition. Finally decomposition algorithm developed illustrated. have also implemented tested on university domain.