Browsing Научные публикации в Scopus by Subject "symmetry"

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Differences of Idempotents In C*-Algebras and the Quantum Hall Effect

Unknown author (2018)

© 2018, Pleiades Publishing, Ltd. Let ϕ be a trace on the unital C*-algebra A and Mϕbe the ideal of the definition of the trace ϕ. We obtain a C*analogue of the quantum Hall effect: if P,Q ∈ A are idempotents and P − Q ∈ ...
Tripotents in algebras: Invertibility and hyponormality

Bikchentaev A. (2014)

© 2014, Pleiades Publishing, Ltd. Let A be a unital algebra over complex field ℂ, I be the unit of A. An element A ∈ A is called tripotent if A3 = A. Let Atri = {A ∈ A: A3 = A}. We show that A ∈ Atri if and only if I ± A ...

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