The result from the title is shown. Let L(H) denote the algebra of all bounded linear operators on a complex Hilbert space H. If M⊂ L(H), then we denote by M′ the commutant of M, M′ = {S ∈ L(H) : T S = S T for every T ∈ M}. The second commutant is denoted by M′′ = (M′)′. Denote further by W(M) the smallest weakly closed subalgebra of L(H) containing M and by AlgLatM the algebra of all operators...

In his paper mentioned in the title, which appears in the same issue of this journal, Mehdi Radjabalipour derives the cyclic decomposition of an algebraic linear transformation. A more general structure theory for linear transformations appears in Irving Kaplansky's lovely 1954 book on infinite abelian groups. We present a translation of Kaplansky's results for abelian groups into the terminolo...

in his paper mentioned in the title, which appears in the same issue of this journal, mehdi radjabalipour derives the cyclic decomposition of an algebraic linear transformation. a more general structure theory for linear transformations appears in irving kaplansky's lovely 1954 book on infinite abelian groups. we present a translation of kaplansky's results for abelian groups into the...

Case Reports Case 1. A 61-year-old female, without prior neurologic history, had a resection due to colon cancer classified as Dukes stage-B2. Adjuvant chemotherapy with 5-FU (450 mg/m i.v. daily for 5 days) and levamisole (150 mg orally for 6 days) was initiated 1 month after surgery. Cycles were repeated at 4-week intervals. Ten days after the third course the patient was admitted because of ...

Patients with severe lung injury due to COVID-19 are often in need of mechanical ventilation. Due the predicted length invasive respiratory support, tracheostomy is commonly indicated improve patient comfort, reduce for sedation and allow safer airway care [7] [8] [15]. In this article we report two clinical cases patients COVID-19, who suffered cardiac arrest problems canula placement. The fir...