Diploma Thesis from the year 2007 in the subject Business economics - General, grade: 1.3, European Business School - International University Schlo Reichartshausen Oestrich-Winkel, language: English, abstract: Despite its apparent economic importance and increasing scientific devotion, the field of entrepreneurship within the area of business sciences is quite young. However, in the last decades research in the respective areas has grown rapidly, meanwhile providing a considerable and presentable coverage of different topics and areas, having brought forward several theories and concepts....

These notes introduce a new class of algebraic curves on Hilbert modular surfaces. These curves are called twisted Teichmuller curves, because their construction is very reminiscent of Hirzebruch-Zagier cycles. These new objects are analyzed in detail and their main properties are described. In particular, the volume of twisted Teichmuller curves is calculated and their components are partially classified. The study of algebraic curves on Hilbert modular surfaces has been widely covered in the literature due to their arithmetic importance. Among these, twisted diagonals (Hirzebruch-Zagier...