Results 81 to 90 of about 2,710 (220)
On Quadrirational Yang-Baxter Maps
Symmetry, Integrability and Geometry: Methods and Applications, 2010 We use the classification of the quadrirational maps given by Adler, Bobenko and Suris to describe when such maps satisfy the Yang-Baxter relation. We show that the corresponding maps can be characterized by certain singularity invariance condition. This
V.G. Papageorgiou +3 more
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Free Vibration Analysis of Bulkhead-Stiffened Functionally Graded Open Shell Using a Meshless Method
Shock and Vibration, 2022 This paper focuses on the free vibration analysis of bulkhead-stiffened functionally graded open shell (FGOS) by means of the first-order shear deformation theory (FSDT) and the meshless strong form method.
Songhun Kwak +4 more
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h$h$‐Function, Hilbert–Kunz density function and Frobenius–Poincaré function
Journal of the London Mathematical Society, Volume 114, Issue 3, September 2026.Abstract Given ideals I,J$I,J$ of a noetherian local ring (R,m)$(R, \mathfrak {m})$ such that I+J$I+J$ is m$\mathfrak {m}$‐primary and a finitely generated R$R$‐module M$M$, we associate an invariant of (M,R,I,J)$(M,R,I,J)$ called the h$h$‐function.
Cheng Meng, Alapan Mukhopadhyay
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A QUADRIC WITH ARITHMETIC PAUCITY
The Quarterly Journal of Mathematics, 2008 The quadric given by the equations x12 + x22 + x32 = y12 + y22 + y32, x1 + x2 + x3 = y1 + y2 + y3 has almost all its solutions with prime coordinates on the diagonals. This is shown in quantitative form. A similar statement holds for integral solutions whose coordinates can be written as the sum of two squares.
Blomer, V., Brüdern, J.
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Pinwheels in symplectic rational and ruled surfaces and non‐squeezing of rational homology balls
Journal of Topology, Volume 19, Issue 3, September 2026.Abstract We use almost toric fibrations and the symplectic rational blow‐up to determine when certain Lagrangian pinwheels, which we call liminal, embed in symplectic rational and ruled surfaces. The case of L2,1$L_{2,1}$‐pinwheels, namely Lagrangian RP2s$\mathbb {R}P^2{\rm s}$, answers a question of Kronheimer in the negative, exhibiting a symplectic ...
Nikolas Adaloglou, Johannes Hauber
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European Journal of Pain, Volume 30, Issue 7, August 2026.ABSTRACT Background Investigating trajectories in older people with back pain (BP) is informative for estimating prognosis and initiating personalized treatment. We aimed to identify 5‐year trajectories of BP‐related disability in older adults, and baseline factors associated with trajectory membership.
Yanyan Fu +3 more
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Shape Analysis and Recognition Method of Artworks Based on Computational Geometry
Engineering Reports, Volume 8, Issue 8, August 2026.Traditional methods for shape analysis and recognition of artworks have many shortcomings in terms of precision, efficiency, and complex shape processing. Especially when faced with complex or abstract artworks, it is often difficult to provide accurate classification and recognition results.
Xiaohan Wang, Zhe Zhang
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Model-Based Hand Tracking by Chamfer Distance and Adaptive Color Learning Using Particle Filter
EURASIP Journal on Image and Video Processing, 2009 We propose a new model-based hand tracking method for recovering of three-dimensional hand motion from an image sequence. We first build a three-dimensional hand model using truncated quadrics.
Kerdvibulvech Chutisant, Saito Hideo
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Finite Fields and Their Applications, 1995 A \(k\)-cap in \(\mathrm{PG}(n,q)\) is a set of \(k\) points, no three of which are collinear. The maximum size of a \(k\)-cap is only known for a few values of \(n\) and \(q\). In [Can. J. Math. 33, 1299--1305 (1980; Zbl 0449.51002)] \textit{B. E. Kestenband} constructed \((q^{2n + 1} + 1)/(q + 1)\)-caps in \(\mathrm{PG}(2n, q^2)\) which were the ...
COSSIDENTE, Antonio, L. STORME
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Gröbner bases for spaces of quadrics of codimension 3 [PDF]
, 2008 Let R=⊕i≥0Ri be an Artinian standard graded K-algebra defined by quadrics. Assume that dimR2≤3 and that K is algebraically closed, of characteristic ≠2. We show that R is defined by a Gröbner basis of quadrics with, essentially, one exception.
Conca, Aldo, Aldo Conca
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