A geometric invariant of discrete groups.
A geometric study of Fibonacci groups.
A geometric version of the Kerov-Kirillov-Reshetikhin construction. (Une version géométrique de la construction de Kerov-Kirilov-Reshetikhin.)
A Geometrical Construction for the Polynomial Invariants of some Reflection Groups
2000 Mathematics Subject Classification: Primary 20F55, 13F20; Secondary 14L30.We construct invariant polynomials for the reflection groups [3, 4, 3] and [3, 3, 5] by using some special sets of lines on the quadric P1 × P1 in P3. Then we give a simple proof of the well known fact that the ring of invariants are rationally generated in degree 2,6,8,12 and 2,12,20,30.
A graphical representation for the free product of E-unitary inverse semigroups.
A group theoretic approach to generalized harmonic vibrations in a one dimensional lattice.
A Group Theoretic Proof of Burnside's pa qb-Theorem.
A group theoretical model for mass-splitting
A Group with Torsion-Free 2-Divisible Homology and Cappell's Result on the Novikov Conjecture.
A group-free characterization of the -geometry for .
A groupoid characterization of Boolean algebras
We present a groupoid which can be converted into a Boolean algebra with respect to term operations. Also conversely, every Boolean algebra can be reached in this way.
A groupoid characterization of orthomodular lattices
We prove that an orthomodular lattice can be considered as a groupoid with a distinguished element satisfying simple identities.
A Guichard theorems on connected monothetic groups
A Hahn-Banach theorem for separation of semigroups and its application.
A Hajós type result on factoring finite abelian groups by subsets. II
It is proved that if a finite abelian group is factored into a direct product of lacunary cyclic subsets, then at least one of the factors must be periodic. This result generalizes Hajós's factorization theorem.
A Hajós-type result on factoring finite Abelian groups by subsets.
A half-commutative IP Roth theorem.
A higher dimensional homotopy sequence.
A homological algebra for valuated groups
A homological exact sequence associated with a family of normal subgroups