Results 41 to 50 of about 3,064 (175)

BOUNDARY REPRESENTATION FOR LOBACHEVSKY SPACES

open access: yesTambov University Reports. Series: Natural and Technical Sciences, 2016
For canonical representations on a Lobachevsky space, a description of distributions concentrated at the boundary is given.
openaire   +2 more sources

On Analogues of the Fuhrmann'S Theorem on the Lobachevsky Plane

open access: yesВладикавказский математический журнал, 2023
Summary: According to Ptolemy's theorem, for a quadrilateral inscribed in a circle on the Euclidean plane, the product of the lengths of the diagonals is equal to the sum of the products of the lengths of opposite sides. This theorem has various generalizations.
openaire   +1 more source

Asymptotics of quantum 6j$6j$‐symbols and generalized hyperbolic tetrahedra

open access: yesJournal of Topology, Volume 18, Issue 3, September 2025.
Abstract We establish the geometry behind the quantum 6j$6j$‐symbols under only the admissibility conditions as in the definition of the Turaev–Viro invariants of 3‐manifolds. As a classification, we show that the 6‐tuples in the quantum 6j$6j$‐symbols give in a precise way to the dihedral angles of (1) a spherical tetrahedron, (2) a generalized ...
Giulio Belletti, Tian Yang
wiley   +1 more source

UnnMindFlex: A prototype mobile application and case study on HRV-guided cognitive enhancement

open access: yesJournal on Interactive Systems
In today’s demanding world, cognitive fitness plays a vital role in academic success and overall well-being, particularly for students facing academic challenges.
Samuel Olawuwo   +5 more
doaj   +1 more source

Transforming Lindblad Equations into Systems of Real-Valued Linear Equations: Performance Optimization and Parallelization of an Algorithm

open access: yesEntropy, 2020
With their constantly increasing peak performance and memory capacity, modern supercomputers offer new perspectives on numerical studies of open many-body quantum systems.
Iosif Meyerov   +6 more
doaj   +1 more source

Symmetric monochromatic subsets in colorings of the Lobachevsky plane [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2010
Combinatorics
Taras Banakh, Artem Dudko, Dusan Repovs
doaj   +1 more source

High‐Entropy Halides for Intercalation Battery Electrode Materials

open access: yesChemElectroChem, Volume 12, Issue 9, May 5, 2025.
The introduction of the high‐entropy concept to oxides has resulted in improvements in electrochemical properties, which have also been recently applied to fluorides. This concept is a perspective of the fundamentals of high‐entropy concept applying to halides in general.
Sebastian Schumacher   +4 more
wiley   +1 more source

IT-education using intelligent learning environments

open access: yesСовременные информационные технологии и IT-образование, 2017
A new systematic approach for structuring of content, methodology and didactics for IT courses is proposed. A mixture of frame-based and production systems is used to represent the knowledge and organize the interactive learning.
Pavel D. Basalin   +5 more
doaj   +1 more source

Deep learning for electrocardiogram interpretation: Bench to bedside

open access: yesEuropean Journal of Clinical Investigation, Volume 55, Issue S1, April 2025.
Schematic overview of applications of DL‐enabled ECG analysis and the barriers to implementation of DL tools to clinical practice. Abstract Background Recent advancements in deep learning (DL), a subset of artificial intelligence, have shown the potential to automate and improve disease recognition, phenotyping and prediction of disease onset and ...
Bas B. S. Schots   +6 more
wiley   +1 more source

Lobachevsky University: On the Way to Be a Research Leader

open access: yesВысшее образование в России, 2016
Lobachevsky State University of Nizhni Novgorod celebrates centenary. In his interview with the Editor, the Rector of the University E.V. Chuprunov sums up its main achievements.
Editorial Article
doaj  

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