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Projective geometry is a very classical part of mathematics and one might think that the subject is completely explored and that there is nothing new to be added. But it seems that there exists no book on projective geometry which provides a systematic treatment of morphisms. We intend to fill this gap. It is in this sense that the present monograph can be called modern. The reason why morphisms have not been studied much earlier is probably the fact that they are in general partial maps between the point sets G and G, noted ' 9: G -- G', i.e. maps 9: D -4 G' whose domain Dom 9: = D is a...

Bei der operativen Behandlung von Frakturen spielt der Fixateur externe eine grosse Rolle. Die genaue Kenntnis der topographischen Anatomie ist Voraussetzung fur eine erfolgreiche Fixateur externe Osteosynthese. Das Buch enthalt hervorragend illustrierte anatomische Querschnitte normaler Extremitaten mit gegenubergestellten Skizzen, in denen die zur externen Fixierung sicheren und gefahrlichen Bereiche angegeben sind. In einer kurzen Erlauterung zu jeder Skizze werden die zu schonenden Strukturen hervorgehoben und die Zonen genau beschrieben, von denen aus das Einbringen der Nagel ohne Risiko...

The past 25 years have seen a progressive improvement in external fixation techniques in terms of patient acceptability, ease of appli- cation and apparatus stability. The recent awareness in Europe of the method, application and excellent results of the technique pio- neered by G. A. I1izarov has caused a rapid increase here in the number of surgeons who have become banderilleros. In particu- lar, external fixators can be used in the treatment of difficult clini- cal conditions, such as severe fractures and their sequelae, as well as for the correction of congenital deformities of the...

Projective geometry is a very classical part of mathematics and one might think that the subject is completely explored and that there is nothing new to be added. But it seems that there exists no book on projective geometry which provides a systematic treatment of morphisms. We intend to fill this gap. It is in this sense that the present monograph can be called modern. The reason why morphisms have not been studied much earlier is probably the fact that they are in general partial maps between the point sets G and G, noted ' 9: G -- G', i.e. maps 9: D -4 G' whose domain Dom 9: = D is a...