Passions du/au corps : lecture sémiotique de Delikatessen de Théo Ananissoh

Extraction de la toxine de Clostridium chauvoei a partir des corps microibens

Groupe de Galois de certains corps de classes

Let K = k( √ −nε0 √ l) where ε0 is the fundamental unit of k = Q( √ l) with l a prime number congruent to 5 or 2 modulo 8, n is an integer prime to l, square free such that C2,K, the 2-class group of K, is isomorphic to Z/2Z × Z/2Z and the genus field K(∗) of K coincides with the first Hilbert 2-class field K 2 of K and let G2 be the Galois group of K 2 /K where K (2) 2 is the second Hilbert 2-...

Construction Géométrique De Représentations De Weil Sur Un Corps Fini

We construct, by contraction of a suitable complex vector bundle, the Weil representation of the finite symplectic group Sp(A). We give an explicit description of the space of all lagrangian subspaces, which we use to compute the cocycle of our representation in terms of a geometric Gauss sum. We recover in this way previously constructed generalized Weil representations (see [2, 3]) by restric...

Simulation dynamique de corps biologiques et changements de topologie interactifs

Algorithmes de calcul de logarithmes discrets dans les corps finis

Computing discrete logarithms is a fundamental task for public key cryptanalysis. Themere existence of a subexponential algorithm for this purpose is not sufficient to definitely ruleon the security level provided by some cryptosystem. Assessing state-of-the-art cryptanalysiscalls for a thorough evaluation process. This dissertation contributes to such an evaluation.In particula...