Results 61 to 70 of about 210,779 (252)

Super Time‐Resolved Tomography

open access: yesAdvanced Science, EarlyView.
A super time‐resolved tomography (STRT) approach is presented to reconstruct 4D X‐ray movies with an order‐of‐magnitude improvement in temporal resolution without sacrificing spatial resolution. By leveraging a physics‐informed deep learning algorithm that shares spatiotemporal features, STRT achieves high‐fidelity 3D reconstructions from sparse‐view ...
Zhe Hu   +6 more
wiley   +1 more source

On the Hilbert series of vertex cover algebras of Cohen-Macaulay bipartite graphs

open access: yesLe Matematiche, 2010
We study the Hilbert function and the Hilbert series of the vertex cover algebra A(G), where G is a Cohen-Macaulay bipartite graph.
Cristian Ion
doaj  

R Libraries for Remote Sensing Data Classification by K-Means Clustering and NDVI Computation in Congo River Basin, DRC

open access: yesApplied Sciences, 2022
In this paper, an image analysis framework is formulated for Landsat-8 Operational Land Imager and Thermal Infrared Sensor (OLI/TIRS) scenes using the R programming language.
Polina Lemenkova, Olivier Debeir
doaj   +1 more source

On Coverings and Hyperalgebras of Affine Algebraic Groups, III [PDF]

open access: yesAmerican Journal of Mathematics, 1975
Over an algebraically closed field of characteristic zero, the universal group covering of a connected affine algebraic group, if such exists, can be constructed canonically from its Lie algebra only. In particular the isomorphism classes of simply connected affine algebraic groups are in 1-1 correspondence with the isomorphism classes of finite ...
openaire   +3 more sources

Covering Morphisms in Categories of Relational Algebras [PDF]

open access: yesApplied Categorical Structures, 2013
Professor George Janelidze posed the problem whether the study of classical topological coverings via categorical Galois Theory could be extended to the setting of relational algebras (see, e.g., [\textit{G. Dzhanelidze}, J. Algebra 132, No. 2, 270--286 (1990; Zbl 0702.18006)].
M. M. Clementino, D. Hofmann, A. Montoli
openaire   +3 more sources

A Perspective on Interactive Theorem Provers in Physics

open access: yesAdvanced Science, EarlyView.
Into an interactive theorem provers (ITPs), one can write mathematical definitions, theorems and proofs, and the correctness of those results is automatically checked. This perspective goes over the best usage of ITPs within physics and motivates the open‐source community run project PhysLean, the aim of which is to be a library for digitalized physics
Joseph Tooby‐Smith
wiley   +1 more source

The projectable hull of an archimedean $ell$-group with weak unit [PDF]

open access: yesCategories and General Algebraic Structures with Applications, 2017
The much-studied projectable hull of an $ell$-group $Gleq pG$ is an essential extension, so that, in the case that $G$ is  archimedean with weak unit, ``$Gin {bf W}$", we have for the Yosida representation spaces a ``covering map" $YG leftarrow YpG$.
Anthony W. Hager, Warren Wm. McGovern
doaj  

Results on the Wess-Zumino consistency condition for arbitrary Lie algebras

open access: yes, 2002
The so-called covariant Poincare lemma on the induced cohomology of the spacetime exterior derivative in the cohomology of the gauge part of the BRST differential is extended to cover the case of arbitrary, non reductive Lie algebras.
A. Barkallil   +15 more
core   +1 more source

Physical Origin of Temperature Induced Activation Energy Switching in Electrically Conductive Cement

open access: yesAdvanced Science, EarlyView.
The temperature‐induced Arrhenius activation energy switching phenomenon of electrical conduction in electrically conductive cement originates from structural degradation within the biphasic ionic‐electronic conduction architecture and shows percolation‐governed characteristics: pore network opening dominates the low‐percolation regime with downward ...
Jiacheng Zhang   +7 more
wiley   +1 more source

The geometry of uniserial representations of algebras II. Alternate viewpoints and uniqueness [PDF]

open access: yes, 2014
We provide two alternate settings for a family of varieties modeling the uniserial representations with fixed sequence of composition factors over a finite dimensional algebra.
Bongartz, Klaus   +1 more
core  

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