gives rise to a well-defined propagator, which is a semigroup of linear operators, and the theory of semigroups of linear operators on Banach spaces has developed quite rapidly since the discovery of the generation theorem byHille and Yosida in 1948. By now, it is a rich theory with substantial applications to many fields cf., e.g., 1–6 . In this paper, we pay attention to some basic problems o...

DEFINITION Text documents often contain a mixture of structured and unstructured content. One way to format this mixed content is according to the adopted W3C standard for information repositories and exchanges, the eXtensible Mark-up Language (XML). In contrast to HTML, which is mainly layout-oriented, XML follows the fundamental concept of separating the logical structure of a document from i...

Securing electronic documents is an important task. It secures the identity of a document. In this sense, methods (mainly cryptographic methods) have been put in place to guarantee secrecy meaning messages as well signing from certificates. The digital document only defined by its textual content. With rise OCRs, alteration and fraudulent use has increased. work we propose algorithm based on co...