EuDML | Browse

Les « groupes totaux » sont les groupes pour lesquels la dimension du centre l’algèbre des invariants d’une algèbre simple centrale $𝔄_{f}$ associée à un $2$ -cocycle $f \in Z^{2} (Gal (L / k), L^{*})$ sous l’action d’un relevé de l’action galoisienne à $𝔄_{f}$ est constante quels que soient $k$ et $f$ . Dans cet article, nous montrons que les groupes quasi-CC (qui sont les groupes de centre cyclique et dont les centralisateurs des éléments hors du centre sont cycliques) sont totaux. Les groupes de type CC qui sont les groupes quasi-CC à centre trivial...

Groups as the union of proper subgroups.

M.J. Tomkinson (1998)

Mathematica Scandinavica

Groups generated by k-transvections.

F.G. Timmesfeld (1990)

Inventiones mathematicae

Groups generated by two mutually Engel periodic elements

H. Heineken (2000)

Bollettino dell'Unione Matematica Italiana

Scriviamo $[x, y] = [x,_{1} y]$ ed $[[x,_{k} y], y] = [x,_{k + 1} y]$ . Cerchiamo gruppi $S L (2, q)$ con generatori $x, y$ tali che $[x,_{m} y] = x$ ed $[y,_{n} x] = y$ per alcuni numeri naturali $m$ , $n$ .

Groups in which $n$ -maximal subgroups are dualpronormal

Alma D'Aniello (1990)

Rendiconti del Seminario Matematico della Università di Padova

Groups in which the prime graph is a tree

Maria Silvia Lucido (2002)

Bollettino dell'Unione Matematica Italiana

The prime graph $Γ (G)$ of a finite group $G$ is defined as follows: the set of vertices is $π (G)$ , the set of primes dividing the order of $G$ , and two vertices $p$ , $q$ are joined by an edge (we write $p \sim q$ ) if and only if there exists an element in $G$ of order $p q$ . We study the groups $G$ such that the prime graph $Γ (G)$ is a tree, proving that, in this case, $|π (G)| \leq 8$ .

Groups of Prime-Power Order Having an Abelian Centralizer of Type (r, 1).

Norman Blackburn (1985)

Monatshefte für Mathematik

Groups satisfying the two-prime hypothesis with a composition factor isomorphic to PSL $_{2} (q)$ for $q \geq 7$

Mark L. Lewis, Yanjun Liu, Hung P. Tong-Viet (2018)

Czechoslovak Mathematical Journal

Let $G$ be a finite group and write $cd (G)$ for the degree set of the complex irreducible characters of $G$ . The group $G$ is said to satisfy the two-prime hypothesis if for any distinct degrees $a, b \in cd (G)$ , the total number of (not necessarily different) primes of the greatest common divisor $gcd (a, b)$ is at most $2$ . We prove an upper bound on the number of irreducible character degrees of a nonsolvable group that has a composition factor isomorphic to PSL $_{2} (q)$ for $q \geq 7$ .

A family of loops is studied, which arises with its binary operation in a natural way from some transversals possessing a ``normality condition''.

Currently displaying 361 – 380 of 1355

Previous Page 19 Next

Displaying 361 – 380 of 1355

Generic $2$ -coverings of finite groups of Lie type

Generic Fixed Point Free Action of Arbitrary Finite Groups.

Group actions on Cartesian powers with applications to represenation theory.

Group extensions and automorphism group rings.

Group representations and integrality.

Group Rings of Circle and Unit Groups.

Group Rings Whose Units Form an FC-Group.

Groupes dont le centralisateur d'un sous-groupe est d'ordre borné.

Groupes finis simples sporadiques

Groupes totaux