Zobrazeno 1 - 10
of 221
pro vyhledávání: '"Howard A, Bell"'
Autor:
Howard E. Bell
Publikováno v:
Publicationes Mathematicae Debrecen. 31:77-80
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62666dc58a601466d628352dd655c08f
https://doi.org/10.5486/pmd.1984.31.1-2.10
https://doi.org/10.5486/pmd.1984.31.1-2.10
Publikováno v:
Insects, Vol 5, Iss 2, Pp 488-498 (2014)
The first recording of Drosophila suzukii in the UK occurred in the south of England during August 2012. Since then sticky traps have continued to record the presence of individuals. Several products (both chemical and biological) were investigated f
Externí odkaz:
https://doaj.org/article/5a3c5054284c4e62958f37760b60977d
Publikováno v:
Aequationes mathematicae. 95:589-598
Let R be a prime ring. In this paper it’s proved that certain subsets of R defined by conditions involving derivations and endomorphisms coincide with the center of R. In fact, our results generalize and improve several results obtained earlier on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f736769e3d1de0ed82b86a96fc9008f1
https://doi.org/10.1007/s00010-021-00789-8
https://doi.org/10.1007/s00010-021-00789-8
Publikováno v:
European Journal of Entomology, Vol 102, Iss 2, Pp 139-145 (2005)
Proteinase activity in the midgut of the pentatomid stinkbug Podisus maculiventris was investigated. The optimal pH for adult and nymph proteolysis was pH 6.0 and pH 6.5, respectively. Proteinase activity was characterised using a range of diagnostic
Externí odkaz:
https://doaj.org/article/ba1e16fa141641c29cb0134ce532f5eb
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 2005, Iss 9, Pp 1387-1391 (2005)
A ring is called semi-weakly periodic if each element which is not in the center or the Jacobson radical can be written as the sum of a potent element and a nilpotent element. After discussing some basic properties of such rings, we investigate their
Externí odkaz:
https://doaj.org/article/e26ea76c0e53487fa95a6fd7a805b09d
Publikováno v:
European Journal of Entomology, Vol 101, Iss 1, Pp 75-81 (2004)
The comparative biology of the solitary endoparasitoid Meteorus gyrator (Thun.) was investigated in five noctuid pest species. Meteorus gyrator parasitized all larval stages of the noctuid pests Lacanobia oleracea, Mamestra brassicae, Spodoptera exig
Externí odkaz:
https://doaj.org/article/afe7ebb8d03048a4b676ead3550b8750
Autor:
Abraham A. Klein, Howard E. Bell
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 2003, Iss 41, Pp 2583-2586 (2003)
We study the properties of certain center-like subsets of groups, which are obtained by localizing setwise commutativity conditions.
Externí odkaz:
https://doaj.org/article/09422c6281664ed7a46a36be4cd1c948
Autor:
Howard E. Bell, Abraham A. Klein
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 29, Iss 9, Pp 525-530 (2002)
We study commutativity in rings R with the property that for a fixed positive integer n, xS=Sx for all x∈R and all n-subsets S of R.
Externí odkaz:
https://doaj.org/article/6ca57c18bd00481c93a4f3f78ed12c97
Autor:
Howard E. Bell
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 28, Iss 7, Pp 413-417 (2001)
We give new proofs of two theorems on rings in which every zero subring is finite; and we apply these theorems to obtain a necessary and sufficient condition for an infinite ring with periodic additive group to have an infinite periodic subring.
Externí odkaz:
https://doaj.org/article/39bea4afc88f45359b089366b4c7ee51
Autor:
Howard E. Bell, Adil Yaqub
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 26, Iss 8, Pp 457-465 (2001)
We prove that a generalized periodic, as well as a generalized Boolean, ring is either commutative or periodic. We also prove that a generalized Boolean ring with central idempotents must be nil or commutative. We further consider conditions which im
Externí odkaz:
https://doaj.org/article/355407dec91a45b78e0454bc3c389666