Results 141 to 150 of about 385 (167)

Other Commutation Theorems

1985
In order to clarify this Chapter, we will be concerned first with an ultraweakly closed space A with condition II, of the form A = Un≥ M Δn × Δn (where Δ ≥ Id is a self-adjoint operator affiliated to a given von Neumann algebra M). This will enable us to deal more simply with an ultraweakly closed space A with condition II and cofinal abelian sequence.
openaire   +1 more source

Möbius' theorem and commutativity

Journal of Geometry, 1997
Let \(A_0A_1A_2A_3\) and \(B_0B_1B_2B_3\) be any two nondegenerate tetrahedra in the three-dimensional projective space \(P_3(F)\) over a field \(F\), which are situated in such a way that \(B_i\in\alpha_i\), \(B_i\not\in\alpha_j\) for \(i\neq j\) \((i,j= 0,1,2,3)\) and \(A_i\in\beta_i\) for \(i= 0,1,2\), where \(\alpha_i(\beta_i)\) is the plane ...
openaire   +2 more sources

A Theorem on Commutative Matrices

Journal of the London Mathematical Society, 1949
openaire   +2 more sources

A commutativity theorem for rings

Mathematical Journal of Okayama University, 1984
The aim of this short paper is to prove the following theorem: ''Let m,n be fixed non-negative integers. Suppose that R satisfies the polynomial identity: \(x^ n[x,y]-[x,y^ m]=0\), R being a ring. (i) If R is left s- unital (that is for every \(x\in R\), \(x\in Rx)\), then R is commutative except the case \(m=1\) and \(n=0\).
openaire   +3 more sources

Some Theorems on Commutative Matrices

Journal of the London Mathematical Society, 1951
Drazin, M. P., Dungey, J. W., Gruenberg, K. W.   +2 more
openaire   +2 more sources

On some commutativity theorems of Herstein

Archiv Der Mathematik, 1973
Bell Howard E, Howard E Bell
exaly  

Commutativity theorems in rings with involution

Communications in Algebra, 2017
Abdellah Mamouni, Lahcen Oukhtite
exaly  

Two elementary commutativity theorems for rings

Acta Mathematica Hungarica, 1977
Abdullah Harmanci
exaly  

The 3-centre and commutativity theorems

Acta Mathematica Hungarica, 1979
H E Bell, Bell H E
exaly  

Commutativity Theorems for Rings with Constraints Involving a Commutative Subset

Resultate Der Mathematik, 2013
Yaqub Adil, Hisao Tominaga
exaly