Business all around the world uses different approaches to know their customers, segment them and formulate suitable strategies for them. One of these approaches is calculating the value of each customer for the company. In this paper by calculating Customer Lifetime Value (CLV) for individual customers of an online toy store named Alakdolak, three customer segments are extracted. The level of ...

Based on the observation that graphs play an important role in the representation of databases, an algebra is presented for the manipulation of binary relations, i.e., of directed unlabeled graphs. This so-called Tarski algebra is based on early work by Tarski. The key notion that has been added to it here is tagging , which is needed for providing both enough modeling power and enough querying...