Abstract In the present work, composites of SnO2 and biocarbon from cashew residue were applied and reported for the first time as anode materials of Li-ion batteries. The composites were developed via a two-step synthesis route consisting of pretreating the cashew residue to create biocarbon, followed by compositing the biocarbon with SnO2. The calcination temperatures were set at 400 °C and 500 °C, and the synthesized samples were denoted as SOC400 and SOC500, respectively. These temperature points were chosen to be significantly lower than those used in previous studies to reduce production costs and enhance commercial competitiveness. The properties and morphologies of the...

Abstract Let D be a division ring with center F, and let n > 1 be an integer. A known result due to Kursov asserts that if D is finite-dimensional over F, then the commutator width of the general linear group GLn(D) is at most one greater than that of GLn(D). In the absence of the finite-dimensionality assumption, recent research has made significant progress, though the developments typically cease once F is infinite or D is algebraic over F. The purpose of this paper is to show that these restrictions are, in fact, unnecessary. Tran, N.S. (2026) Linear Algebra and its Applications, 728, pp. 376–382. DOI: https://doi.org/10.1016/j.laa.2025.09.015