One of the most famous problems of classical geometry is the Apollonius' problem asks construction of a circle which is tangent to three given objects. These objects are usually taken as points, lines, and circles. This well known problem was posed by Apollonius of Perga ( about 262 - 190 B.C.) who was a Greek mathematician known as the great geometer of ancient times after Euclid and Archimede...

Expressing inside n-Opposition Theory the forkings and isolated points of the modal graphs 15.00 S. Salaet (Barcelona): An abstract algebraic logic view on Nelson's para-consistent logic N4 15.30 Coffee time in the Haus 15.45 K. Brünnler (Bern): Is there a proof theory of temporal logic? 16.15 A. Costa-Leite (Neuchâtel): Paraconsistentization of logics-the general theory of paraconsistent logic...

The dynamics of ‘‘vicious,’’ continuously growing civilizations ~domains!, which engage in ‘‘war’’ whenever two domains meet, is investigated. In the war event, the smaller domain is annihilated, while the larger domain is reduced in size by a fraction e of the casualties of the loser. Here e quantifies the fairness of the war, with e51 corresponding to a fair war with equal casualties on both ...