The theory of exterior differential systems provides a framework for systematically addressing the typically non-linear, and frequently overdetermined, partial differential equations that arise in differential geometry. Adaptation of the techniques of microlocalization to differential systems have led to recent activity on the foundations of the theory; in particular, the fundamental role of the characteristic variety in geometric problems is now clearly established. In this book the general theory is explained in a relatively quick and concrete manner, and then this general theory is applied to the recent developments in the classical problem of isometric embeddings of Riemannian manifolds.

This ever popular handbook is aimed at students and others who wish to learn the techniques of artefact illustration, regardless of ability or previous experience. It includes comprehensive advice on many aspects of archaeological artefact illustration from equipment and materials to the preparation of finished artwork for printing.

Ricerca seria e rigorosa delle possibilitą di reciproco arricchimento fra fede cristiana e la tradizione pił ortodossa degli indł.

At the turn of the century gynecology had achieved independence from surgery in most medical schools; although gynecologists were surgeons, their interests were turning toward nonsurgical aspects of their specialty. In 1900, merely two years after the Curies' discovery, radium was first used as a treatment for carcinoma of the cervix. In that day cervical cancer claimed more women's lives than any other malignancy and was described by Wil­ liam P. Graves, the second professor of gynecology at Harvard as follows: 'Cancer of the cervix may rightly be termed of all tumors one of the most deadly and most ghastly. It kills by slow torture, causing in later stages months of agonizing pain and producing a discharge of such a foul and nauseating character as to repel proper medical assistance. Nurses declined to care for these cases, while many public hospitals closed their wards to them as patients. ' In late twentieth century parlance the dramatic results of radium therapy would indeed have been called a 'breakthrough'? and radium techniques, later combined with external irradiation, were devel­ oped by gynecologists, no longer just surgeons. Pathology was the basic science of gynecology and gynecologists with a special interest in pathology served as pathologist to the departments of gynecology. As late as 1970 six months of the three-year residency program in obstetrics and gynecology at Harvard were devoted to formal training in pathology.

Per un quarto di secolo, Bede Griffiths č vissuto in India. Nel volume offre il risultato di anni di meditazione, descrivendo quelli che egli chiama i 'miti' religiosi - indł, ebraici, cristiani - ossia quei testi sacri antichi che attraverso il linguaggio dei simboli comunicano una sapienza intuitiva circa i valori di ogni umana realtą. Ed essi portano alla comune consapevolezza che Dio č presente nell'uomo e nella natura: 'Quando un uomo incontra Dio, la realtą, la veritą, l'amore, anche se č formalmente un ateo o un agnostico, egli incontra la grazia di Dio in Cristo'.

Presents a new version of the Greek classic drama as adapted for a modern theatrical performance