Homotopy types of orbit spaces and their self-equivalences for the periodic groups and .
Ia-Automorphisms and Permutational Wreath Products
Il gruppo degli automorfismi esterni di un -gruppo nilpotente infinito e suoi -sottogruppi normali
Infinite soluble groups with no outer automorphisms
Infinitesimal Morita homomorphisms and the tree-level of the LMO invariant
Let be a compact connected oriented surface with one boundary component, and let be the fundamental group of . The Johnson filtration is a decreasing sequence of subgroups of the Torelli group of , whose -th term consists of the self-homeomorphisms of that act trivially at the level of the -th nilpotent quotient of . Morita defined a homomorphism from the -th term of the Johnson filtration to the third homology group of the -th nilpotent quotient of . In this paper, we replace groups...
Intersections of automorphism fixed subgroups in the free group of rank three.
Linear representations of the group of conjugating automorphisms and the braid groups of some manifolds.
Matrix theoretic interpretation of the classical Markoff theory. (L'interprétation matricielle de la théorie de Markoff classique.)
Moduli of graphs and automorphisms of free groups.
Morita classes in the homology of automorphism groups of free groups.
On a free action of a group on an Abelian group.
On a group acting locally freely on an Abelian group.
On a question of Deaconescu about automorphisms
On a question of Deaconescu about automorphisms. - III
On automorphisms fixing subnormal subgroups of soluble groups
The group of all automorphisms leaving invariant every subnormal subgroup of the group is studied. In particular it is proved that is metabelian if is soluble, and that is either finite or abelian if is polycyclic.
On Certain Classes of rigid groups
On group automorphisms fixing subnormal subgroups setwise
In questo lavoro si studiano i gruppi , , degli automorfismi di un gruppo che fissano — come insiemi — tutti i sottogruppi di che risultano essere rispettivamente subnormali, subnormali di difetto al più , oppure che sono compresi tra un sottogruppo caratteristico ed il suo derivato. Si danno condizioni sufficienti affinché tali gruppi siano parasolubili di para-altezza al più 2 o 3. Si generalizzano così risultati da [4], [7], [8], [10].
On groups of automorphisms of nilpotent -groups of finite rank
On infinite Nielsen transformations.
On Outer Automorphism Groups of Coxeter Groups.