Results 81 to 90 of about 9,476 (202)
Random Structures &Algorithms, Volume 68, Issue 1, January 2026.ABSTRACT We study a random walk on the Lie algebra sl2(Fp)$$ {\mathfrak{sl}}_2\left({\mathbf{F}}_p\right) $$ where new elements are produced by randomly applying adjoint operators of two generators. Focusing on the generic case where the generators are selected at random, we analyze the limiting distribution of the random walk and the speed at which it
Urban Jezernik, Matevž Miščič
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WIREs Cognitive Science, Volume 17, Issue 1, January/February 2026.The inverted U in Movement and Cognition ABSTRACT The “inverted U” relationship between movement and cognition throughout the human lifespan highlights the intricate interplay between physical activity and cognitive function. This relationship posits that an optimal level of physical activity maximizes cognitive function, while insufficient activity ...
Gerry Leisman +3 more
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Forum of Mathematics, SigmaThe study of Koszul binomial edge ideals was initiated by V. Ene, J. Herzog, and T. Hibi in 2014, who found necessary conditions for Koszulness. The binomial edge ideal $J_G$ associated to a finite simple graph G is always generated by quadrics ...
Adam LaClair +3 more
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F-theory models with U(1) × ℤ2 , ℤ4 and transitions in discrete gauge groups
Journal of High Energy Physics, 2020 We examine the proposal in the previous paper to resolve the puzzle in transitions in discrete gauge groups. We focus on a four-section geometry to test the proposal.
Yusuke Kimura
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IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.This paper presents TrinityNet, a cross‐modality generative reasoning framework for zero‐label railway fastener tightness evaluation, integrating RGB, depth, and 3D mesh data without manual annotation. Utilising a dual evaluator with adversarial streams and self‐supervised training, it achieves substantial gains in discriminator stability (99.64% loss ...
Wenjuan Wang +8 more
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Fitting quadrics with a Bayesian prior
Computational Visual Media, 2016 Quadrics are a compact mathematical formulation for a range of primitive surfaces. A problem arises when there are not enough data points to compute the model but knowledge of the shape is available.
D. Beale +4 more
semanticscholar +1 more source
Algebraic tori in the complement of quartic surfaces
Journal of the London Mathematical Society, Volume 113, Issue 1, January 2026.Abstract Let B⊂P3$B\subset \mathbb {P}^3$ be an slc quartic surface. The existence of an embedding Gm3↪P3∖B$\mathbb {G}_m^3\hookrightarrow \mathbb {P}^3\setminus B$ implies that B$B$ has coregularity zero. In this article, we initiate the classification of coregularity zero semi log canonical (slc) quartic surfaces B⊂P3$B\subset \mathbb {P}^3$ for ...
Eduardo Alves da Silva +2 more
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Shaping Single Offset Reflector Antennas Using Local Axis-Displaced Confocal Quadrics
International Journal of Antennas and Propagation, 2016 This work investigates a novel numerical procedure for the solution of an exact formulation for the Geometrical Optics synthesis of a single reflector antenna by simultaneously imposing Snell’s Law and Conservation of Energy in a tube of rays, yielding a
Rafael A. Penchel +2 more
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A new characterization of elliptic quadrics in PG(3, q), q odd
Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2018 We prove that a set O of points of PG(3,q), q odd, of line-type (0,m,n)_1, n ≠ q, with a point on which there are at most q+1 lines intersecting O in exactly m points is either an elliptic quadric or n = q + 1 and O is the complement of a line in PG(3,q).
Vito Napolitano
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Derived categories of quadric fibrations and intersections of quadrics
Advances in Mathematics, 2008 22 ...
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