Semigroups and Groups
Semigroups with certain finiteness conditions and Chernikov groups
... of semigroups under consideration or exact interre- lations between classes of such semigroups required either references to known results about groups or obtaining new group-theoretic results or, if ...
8
Permutation groups and transformation semigroups : results and problems
... This paper surveys some recent results on the transformation semigroup gener- ated by a permutation group G and a single non-permutation a. Our particular concern is the influence that properties of G (related to ...
15
FINITELY PRESENTED EXPANSIONS OF GROUPS, SEMIGROUPS, AND ALGEBRAS
... c.e. semigroups, groups, and algebras that fail to possess finitely presented expansions, thus answering the question of Bergstra- Tucker and Goncharov for the classes of semigroups, groups and ...
20
Some L2 properties of semigroups of measures on Lie groups
... We investigate the induced action of convolution semigroups of probability measures on Lie groups on the L 2 -space of Haar measure. Necessary and sufficient conditions are given for the infinitesimal gen- ...
17
Some L2 properties of semigroups of measures on Lie groups
... We investigate the induced action of convolution semigroups of probability measures on Lie groups on the L 2 -space of Haar measure. Necessary and sufficient conditions are given for the infinitesimal gen- ...
17
Pseudo Differential Operators and Markov Semigroups on Compact Lie Groups
... The organisation of the paper is as follows. In section 2 we collect together some useful results about Feller semigroups in general locally compact spaces. As discussed above section 3 contains the definition and ...
33
Potentially right simple π-regular semigroups are right groups
... simple groups, rings, the simple and congruence-free semigroups) attracted the attention of algebraists ...the semigroups without non-trivial right (or left) congruences are exactly either ...
6
THE PARTIAL-ISOMETRIC CROSSED PRODUCTS BY SEMIGROUPS OF ENDOMORPHISMS ARE MORITA EQUIVALENT TO CROSSED PRODUCTS BY GROUPS
... [1] S. Adji, Invariant ideals of crossed products by semigroups of endomorphisms, from Proc. Conference in Functional Analysis and Global Analysis in Manila, October 1996, Springer, Singapore, 1996. [2] S. Adji, ...
19
Transformation Semigroups Over Groups
... The following theorem, which gives a formula for de- termining the number of conjugacy classes in GwrT n , is analogous to the formula for the number of conjugacy classes in GwrS n.. So,[r] ...
99
Differentiable semigroups are Lie groups
... The first appearance of the power series representation of the group multiplication, a particular series given in terms of the associated Lie algebra multiplication, is attributed to Cam[r] ...
22
Remarks on embeddable semigroups in groups and a generalization of some Cuthbert's results
... We can quote, for example, compact operators, weakly compact operators, strictly singular operators, strictly cosingular operators, upper semi-Fredholm perturbations, and Fredholm pertur[r] ...
11
Banach algebras on groups and semigroups
... discrete semigroups that we consider will be monoids, in order to ensure that we are in this setting (note, however, that ` 1 pSq can be unital without S being a monoid; see for instance [24, Example ...
171
Finite groups are big as semigroups
... In the next section, we gather the necessary semigroup-theoretical pre- liminaries and formulate our main result, Theorem B below, which is slightly more general than the above statement; the backward implication in ...
10
Automorphism groups of superextensions of finite monogenic semigroups
... monogenic semigroups and charac- teristic ideals in such ...automorphism groups of the superextensions of finite monogenic semigroups of cardinality 6 ...
26
Groups and semigroups with a one counter word problem
... with groups, if F is closed under inverse homomorphism, then membership of the word problem in F is independent of the choice of finite generating set for the ...from groups to semigroups since the ...
14
Finitely generated left ideals in Banach algebras on groups and semigroups
... discrete semigroups that we consider will be monoids, in order to ensure that we are in this setting (note, however, that ` 1 (S) can be unital without S being a monoid; see for instance [5, Example ...
36
Orbits of primitive k homogenous groups on (n k) partitions with applications to semigroups
... primitive groups, and we also give estimates on the number of orbits of primitive groups on (n − k)-partitions, for k ≥ ...permutation groups in which all orbits on (n − k)-partitions are invariant ...
40
Free semigroups in wreath powers of transformation semigroups
... permutation groups are rich of free subgroups ([1], ...transformation semigroups is not true in general as this inverse limit do not certainly contain such ...topological semigroups most finitely ...
11
Class semigroups and t-class semigroups of integral domains
... Theorem 2.16 ([8, Theorem 4.5]). An integrally closed domain is Clifford regular if and only if it is a Pr¨ufer domain of finite character. We wish to talk a little about the conjecture mentioned above. It attracted the ...
30
Ends of semigroups
... cancellative semigroups and that the cardinality of the set of ends is invariant in subsemi- groups and extension of finite Green index in left cancellative ...
206