C*–algebras Nearly Contained in Type I Algebras

On Type I C-algebras

Type I Planet Migration in Nearly Laminar Disks

We describe 2D hydrodynamic simulations of the migration of low-mass planets (≤ 30M⊕) in nearly laminar disks (viscosity parameter α < 10 ) over timescales of several thousand orbit periods. We consider disk masses of 1, 2, and 5 times the minimum mass solar nebula, disk thickness parameters of H/r = 0.035 and 0.05, and a variety of α values and planet masses. Disk selfgravity is fully included...

Characterizing Type I C-algebras via Entropy

Let A be a separable unital C-algebra. It is shown that A is type I if and only if the CNT-entropy of every inner automorphism of A is zero.

Nearly higher ternary derivations in Banach ternary algebras :An alternative fixed point approach

We say a functional equation () is stable if any function g satisfying the equation () approximatelyis near to true solution of (). Using xed point methods, we investigate approximately higherternary derivations in Banach ternary algebras via the Cauchy functional equationf(1x + 2y + 3z) = 1f(x) + 2f(y) + 3f(z) :

Graded Radical W Type Lie Algebras I