Results 71 to 80 of about 38,780 (317)

Decomposable approximations of nuclear C*-algebras [PDF]

open access: yes, 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
core   +1 more source

TRIM: Simultaneous Thermometry, Ranging, and Imaging via a Monolithic Metalens

open access: yesAdvanced Science, EarlyView.
ABSTRACT While metasurfaces offer a pathway beyond the discrete architectures of conventional LWIR systems, physically fusing high‐precision thermometry and passive ranging onto a single metalens remains a formidable challenge. Here, we demonstrate a monolithic, dual‐focus metalens capable of simultaneous multidimensional sensing.
Man Yuan   +10 more
wiley   +1 more source

A Refined Geometry of Logic

open access: yesPrincipia: An International Journal of Epistemology, 2009
In order to measure the degree of dissimilarity between elements of a Boolean algebra, the author’s (1984) proposed to use pseudometrics satisfying generalizations of the usual axioms for identity.
David Miller
doaj  

A note on homomorphisms of Hilbert algebras

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
We give a representation theorem for Hilbert algebras by means of ordered sets and characterize the homomorphisms of Hilbert algebras in terms of applications defined between the sets of all irreducible deductive systems of the associated algebras.
Sergio Celani
doaj   +1 more source

Fascinating Number Sequences from Fourth Order Difference Equation Via Quaternion Algebras

open access: yesDiscussiones Mathematicae - General Algebra and Applications, 2021
The balancing and Lucas-balancing numbers are solutions of second order recurrence relations. A linear combination of these numbers can also be obtained as solutions of a fourth order recurrence relation.
Patra Asim
doaj   +1 more source

The algebra ofG-relations

open access: yesProceedings Mathematical Sciences, 2000
After an introduction concerned with equivalence relations and the tower associated to them, the authors study some properties of \(G\)-relations (where \(G\) is a group) and connect them with the algebras \(A_n^G(d)\) (algebras that have a basis indexed by ``\(G\)-stable equivalence relations'').
Kodiyalam, Vijay   +2 more
openaire   +2 more sources

Levels and sublevels of composition algebras

open access: yes, 2007
Lewis' and Leep's bounds on the level and sublevel of quaternion algebras are extended to the class of composition algebras. Some simple constructions of composition algebras of known level values are given.
O'Shea, James
core   +1 more source

Beyond Percolation: Graphene‐Enabled Network Reinforcement Enhances Thermal Transport in Paraffin Phase‐Change Composites

open access: yesAdvanced Science, EarlyView.
Expanded‐graphite/graphene‐nanoplatelet hybrids deliver a near‐order‐of‐magnitude thermal‐conductivity enhancement in paraffin phase‐change materials. A microCT‐informed 3D modeling framework resolves the percolating EG backbone and captures sub‐voxel GNP enrichment, quantitatively linking microstructure to heat flow and revealing a graphene‐enabled ...
Thomas Hoke   +4 more
wiley   +1 more source

The characterization of Nelson algebras by Sheffer stroke

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
In this study, Sheffer stroke Nelson algebras (briefly, s-Nelson algebras), (ultra) ideals, quasi-subalgebras, quotient sets, and fuzzy structures on these algebraic structures are introduced.
Oner Tahsin   +2 more
doaj   +1 more source

Type A Hecke algebras and related algebras

open access: yesArchiv der Mathematik, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

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