Computing second cohomology of finite groups with trivial coefficients.
Computing the equvariant cohomology of group compactifications.
Computing the Ideal Structure of Finite Semigroups.
Computing the integral closure of an affine semigroup.
Comultiplication on monoids.
Concerning Abelian-Regular Transitive Triple Systems
Concerning almost divisible torsion free abelian groups
Concerning congruence relations on commutative semigroups (Preliminary communication)
Concerning congruences on symmetric inverse semigroups
Concerning functional equations of the generalized Bol-Moufang type.
Concerning restrictions of Green's H equivalence.
Conditions for p-supersolubility and p-nilpotency of finite soluble groups
Let ℨ be a complete set of Sylow subgroups of a group G. A subgroup H of G is called ℨ-permutably embedded in G if every Sylow subgroup of H is also a Sylow subgroup of some ℨ-permutable subgroup of G. By using this concept, we obtain some new criteria of p-supersolubility and p-nilpotency of a finite group.
Conditions for strong Morita equivalence of partially ordered semigroups
We investigate when a partially ordered semigroup (with various types of local units) is strongly Morita equivalent to a posemigroup from a given class of partially ordered semigroups. Necessary and sufficient conditions for such equivalence are obtained for a series of well-known classes of posemigroups. A number of sufficient conditions for several classes of naturally ordered posemigroups are also provided.
Conditions nécessaires et suffisantes de simplifiabilité des demi-groupes quotients d'un demi-groupe libre sur un ensemble fini par certaines congruences
Conditions of Finiteness on Sharply 2-Transitive Groups.
Cônes asymptotiques et invariants de quasi-isométrie pour les espaces métriques hyperboliques
On utilise l'équivalence due à M. Gromov entre l'hyperbolicité d'un espace métrique géodésique et le fait que ses cônes asymptotiques sont des arbres réels. Ce résultat permet tout d'abord de donner une nouvelle preuve du fait que l'inégalité isopérimétrique sous-quadratique implique l'hyperbolicité. Les avantages de cette preuve sont qu'elle est très courte et qu'elle utilise une seule propriété de la fonction aire de remplissage des courbes fermées, l'inégalité du quadrilatère....
Conference on Geometry and Mathematical Physics, Bulgaria, Zlatograd, 28.08-01.09.2005
List of ParticipantsOrganizing committee: Vasil Tsanov – Sofia University (Chairman), Harry Aleksiev – High School for Management and Laguages in Zlatograd (Local Organizer), Leon Farhy – Sofia University (Scientific Secretary), Emil Horozov – Sofia University, Ivailo Mladenov – Bulgarian Academy of Sciences, Angel Zhivkov – Sofia University.
Configuration conditions of small point rank in 3-nets
Conformal dimension and Gromov hyperbolic groups with 2-sphere boundary.
Conformally covariant field equations