Results 51 to 60 of about 327,876 (275)

Equiangular Vectors Approach to Mutually Unbiased Bases

open access: yesEntropy, 2013
Two orthonormal bases in the d-dimensional Hilbert space are said to be unbiased if the square modulus of the inner product of any vector of one basis with any vector of the other equals 1 d.
Maurice R. Kibler
doaj   +1 more source

Characterizations of inner product structures involving the radius of the inscribed or circumscribed circumference [PDF]

open access: yes, 1996
summary:We define the radius of the inscribed and circumscribed circumferences in a triangle located in a real normed space and we obtain new characterizations of inner product ...
Tomás, M. S., Alsina, C., Guijarro, P.
core  

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

open access: yesAdvanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira   +4 more
wiley   +1 more source

Quantitative relations between different measurement contexts [PDF]

open access: yesQuantum
In quantum theory, a measurement context is defined by an orthogonal basis in a Hilbert space, where each basis vector represents a specific measurement outcome.
Ming Ji, Holger F. Hofmann
doaj   +1 more source

Bombieri-Type Inequalities and Their Applications in Semi-Hilbert Spaces

open access: yesAxioms, 2023
This paper presents new results related to Bombieri’s generalization of Bessel’s inequality in a semi-inner product space induced by a positive semidefinite operator A.
Najla Altwaijry   +2 more
doaj   +1 more source

Only 'free' measures are admissable on F(S) when the inner product space S is incomplete

open access: yes, 2007
Using elementary arguments and without having to recall the Gleason Theorem, we prove that the existence of a nonsingular measure on the lattice of orthogonally closed subspaces of an inner product space S is a sufficient (and of course, a necessary ...
D. Buhagiar, E. Chetcuti
semanticscholar   +1 more source

Characterization of group homomorphisms having values in an inner product space

open access: yesPublicationes mathematicae (Debrecen), 2000
In this note we prove that for functions f : G → E from a group G to an inner product space E, the inequality ‖f(xy)‖ ≥ ‖f(x) + f(y)‖ (x, y ∈ G) implies f(xy) = f(x) + f(y) (x, y ∈ G), and ask the open question: Is this statement true also for strictly ...
Gyula Maksa, P. Volkmann
semanticscholar   +1 more source

A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection

open access: yesAdvanced Engineering Materials, EarlyView.
A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan   +9 more
wiley   +1 more source

Near‐Field Electrospinning Micro‐Printhead Achieves Precise Control of Nanofiber Deposition

open access: yesAdvanced Engineering Materials, EarlyView.
A micro‐printhead for near‐field electrospinning enables reproducible deposition of polymer nanofibers with diameters below 50 nm. Systematic parameter studies uncover the mechanisms linking operating conditions to fiber morphology, paving the way for precise and low‐cost nanoscale 3D manufacturing.As a high‐resolution, cost‐effective, and rapid ...
Han Xu, Dario Mager, Jan G. Korvink
wiley   +1 more source

Exploring novel semi-inner product reproducing Kernels in Banach space for robust Kernel methods.

open access: yesPLoS ONE
Kernel methods are widely applied across various domains; however, structural limitations of reproducing kernels in Hilbert spaces pose significant challenges.
Yi Ding, Ying Zhao, Yan Pei
doaj   +1 more source

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