Results 71 to 80 of about 14,642,230 (161)
MATHEMATICA SCANDINAVICA, 1993 We show that if \(A\) and \(B\) are \(\sigma\)-unital, projective \(C^*\)- algebras (star-homomorphisms into \(C^*\)-algebras quotients lift to star-homomorphisms) then \(A\oplus B\) and \(M_ n(A)\) are projective. Corresponding results are proven for semiprojectivity. A corollary is that elements \(h_ 1,\dots, h_ n\) in a quotient \(C/I\) satisfying \[
openaire +2 more sources
Traces on the uniform tracial completion of Z$\mathcal {Z}$‐stable C∗${\rm C}^*$‐algebras
Journal of the London Mathematical Society, Volume 111, Issue 6, June 2025.Abstract The uniform tracial completion of a C∗${\rm C}^*$‐algebra A$A$ with compact trace space T(A)≠∅$T(A) \ne \emptyset$ is obtained by completing the unit ball with respect to the uniform 2‐seminorm ∥a∥2,T(A)=supτ∈T(A)τ(a∗a)1/2$\Vert a\Vert _{2,T(A)}=\sup _{\tau \in T(A)} \tau (a^*a)^{1/2}$. The trace problem asks whether every trace on the uniform
Samuel Evington
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, 2012 This Saylor course is an extension of abstract algebra I and revisits structures like groups, rings and fields as well as mappings like homomorphisms and isomorphisms.
algebra, The Saylor Foundation
core
Decomposable approximations of nuclear C*-algebras [PDF]
, 2012 We show that nuclear <i>C</i><sup>*</sup>-algebras have a refined version of the completely positive approximation property, in which the maps that approximately factorize through finite dimensional algebras are convex ...
Kirchberg, Eberhard +5 more
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Journal of New Theory, 2017 This paper deals the notion of Ω −N -structured subalgebras and Ω−N -structured Filters on CI-algebra.
Prakasam Muralikrishna +1 more
doaj
Journal of Applied Crystallography, Volume 58, Issue 2, Page 564-572, April 2025.Small‐angle X‐ray scattering was applied to polyether polyurethane to investigate the effects of solvent vapor annealing on the microphase separation. Among the solvents studied, methyl ethyl ketone induced the greatest degree of phase separation in polyurethane compared with the thermally annealed state.This study investigated the effects of solvent ...
Shanshan Wang +5 more
wiley +1 more source
The composition algebra of a cyclic quiver
, 1993 Ringel CM. The composition algebra of a cyclic quiver. Proceedings of the London Mathematical Society : Ser. 3.
Ringel, Claus Michael
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InstaMap: instant‐NGP for cryo‐EM density maps
Acta Crystallographica Section D, Volume 81, Issue 4, Page 147-169, April 2025.Cryo‐EM density‐map inference, with fixed pose and contrast transfer function, using a multi‐resolution hash‐encoding framework called instant‐NGP, is described, together with its extension to heterogeneity inference by bending space with a per‐image vector field.Despite the parallels between problems in computer vision and cryo‐electron microscopy ...
Geoffrey Woollard +7 more
wiley +1 more source
Журнал Белорусского государственного университета: Математика, информатика, 2018 Before showed in 1961 that every n-homogeneous C*-algebra is isomorphic to the algebra of all continuous sections for the appropriate algebraic bundle. The base space for the bundle is homeomorphic to the space of primitive ideals for the algebra in the ...
Mikhail V. Shchukin
doaj
Quantum automorphism groups of lexicographic products of graphs
Journal of the London Mathematical Society, Volume 111, Issue 4, April 2025.Abstract Sabidussi's theorem [Duke Math. J. 28 (1961), 573–578] gives necessary and sufficient conditions under which the automorphism group of a lexicographic product of two graphs is a wreath product of the respective automorphism groups. We prove a quantum version of Sabidussi's theorem for finite graphs, with the automorphism groups replaced by ...
Arnbjörg Soffía Árnadóttir +4 more
wiley +1 more source