Projective groups and line arrangements

L’Interdite, roman d’urgence, dans lequel Mokeddem décide d’aller plus loin dans la question de l’entre-deux, car elle a vécu un « inter », dans la mesure où

These characteristic varieties depend on the cohomology of the complement of the line arrangement twisted by characters of the fundamental group on C ∗.. For the characters which

We use cohomology with coefficients in rank 1 local systems on the complement to compute the ho- mology groups of the Milnor fiber, with coefficients in a field not dividing the number

In this section, we discuss relations of freeness of divisors (especially hyperplane arrangements) and splitting problems of vector bundles.. We emphasize parallelism and

Lehmer conjecture, Lehmer problem, Lehmer’s number, Schinzel-Zassenhaus conjecture, mapping class, stretch factor, coxeter system, Salem number, Perron number, Pisot number,

For a given parametric representation of a curve, PTOPO computes the special points on the curve, the characteristic box, the corresponding graph, and then it visualizes the

In particular, for every k 6= 0, we obtain an affine variety which is simultaneously the total space of non trivial torsors under complex vector bundles over P 1 with different

We prove that, under certain combinatorial conditions, the realization spaces of line arrangements on the complex projective plane are connected.. We also give several examples