In this paper we present several proofs on the extension of M. Riesz fractional integration and di¤erentiation to the contexts of spaces of homogeneous type and measure metric spaces with non-doubling measures. 1. Introduction, some de…nitions, and a basic lemma Professor M. Ash asked me to write a survey article on some of the results that Stephen Vági and I obtained in the nineties on fractio...

learner autonomy has become the area of interest by many researchers of foreign language learning in the recent years. however, few studies have been done concerning the case of kurdish learners` autonomy in learning languages. for this reason, the current study addresses this gap. it intends to investigate to what extent kurdish learners are autonomous in learning english language. the study i...

As the number of systems which offer annotations on digital documents increases, robust anchoring of annotations is a key challenge. It is especially important if the annotator lacks write-access to the document being annotated. For example, if someone makes an annotation on a web page today and the web page changes tomorrow, what happens to the annotation? One approach is simply to “orphan” th...