A new C*-enlargement of a C*-algebra A nested between the local multiplier algebra Mloc(A) of A and its injective envelope I(A) is introduced. Various aspects of this maximal C*-algebra of quotients,â€¦ (More)

A linear mapping T from a subspace E of a Banach algebra into another Banach algebra is called spectrally bounded if there is a constant M â‰¥ 0 such that r(Tx) â‰¤ M r(x) for all x âˆˆ E, where r( Â· )â€¦ (More)

The properties of a bounded derivation d on a complex Banach algebra A such that the spectrum Ïƒ([x, dx]) is finite for all x âˆˆ A are studied. In particular we show that, if Ïƒ([x, dx]) is a singletonâ€¦ (More)

Kadisonâ€™s theorem of 1951 describes the unital surjective isometries between unital C*-algebras as the Jordan *-isomorphisms. We propose a nonselfadjoint version of his theorem and discuss the casesâ€¦ (More)

The stability and the effect of pH and temperature on the activity of aspartate transcarbamylase from mantle of mussel were studied. The Km values for aspartic acid and carbamylphosphate at 35â€¦ (More)

Let A be a unital complex Banach algebra. A linear mapping T : E â†’ B from a subspace E âŠ† A into another unital complex Banach algebra B is called spectrally bounded if there is a constant M â‰¥ 0 suchâ€¦ (More)

We establish a description of the maximal C*-algebra of quotients of a unital C*-algebra A as a direct limit of spaces of completely bounded bimodule homomorphisms from certain operator submodules ofâ€¦ (More)

We prove that every Lie derivation on a C -algebra is in standard form, that is, it can be uniquely decomposed into the sum of a derivation and a centre-valued trace. r 2003 Elsevier Inc. All rightsâ€¦ (More)