Results 41 to 50 of about 2,111,624 (316)

Object-Image Correspondence for Algebraic Curves under Projections

Symmetry, Integrability and Geometry: Methods and Applications, 2013
We present a novel algorithm for deciding whether a given planar curve is an image of a given spatial curve, obtained by a central or a parallel projection with unknown parameters.
Joseph M. Burdis, Irina A. Kogan, Hoon Hong   +2 more
doaj   +1 more source

Rank of divisors on tropical curves [PDF]

, 2013
We investigate, using purely combinatorial methods, structural and algorithmic properties of linear equivalence classes of divisors on tropical curves.
Králʼ, Daniel, Hladký, Jan, Norine, Serguei   +2 more
core   +1 more source

Venous Thromboembolism in Pediatric Bone Sarcoma Patients: A 10‐Year, Single‐Institution Experience Encompassing the COVID‐19 Pandemic

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Osteosarcoma (OS) and Ewing sarcoma (EWS) are the most common primary bone cancers in children, but acute thrombosis is poorly characterized in this population. Our study evaluated the rates of venous thromboembolism (VTE) and associated risk factors in pediatric patients with bone sarcomas treated over a 10‐year period encompassing
Sarah Kappa, Shou Xu, Mark Zobeck, Sarah E. Sartain, Nino Rainusso, Lisa Wang, Nicole Montgomery, Paige Wheaton, Sarah Whittle   +8 more
wiley   +1 more source

Quaternion-Based Representation of Rotation Minimizing Motions in Euclidean 3-space

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
This paper presents a quaternion-based framework for constructing rotation-minimizing motions in Euclidean 3-space, formulated via quaternion operator. By introducing a novel quaternion operator, we derive angular velocity representations directly from ...
Aksar Murat, Yaylı Yusuf
doaj   +1 more source

Contact Geometry of Curves

Symmetry, Integrability and Geometry: Methods and Applications, 2009
Cartan's method of moving frames is briefly recalled in the context of immersed curves in the homogeneous space of a Lie group $G$. The contact geometry of curves in low dimensional equi-affine geometry is then made explicit.
Peter J. Vassiliou
doaj   +1 more source

ON ARITHMETIC CURVES IN THE MODULI SPACES OF CURVES [PDF]

Journal of the Institute of Mathematics of Jussieu, 2005
The author studies several types of curves and higher-dimensional objects, such as origamis and eigencurves (or eigenloci in general), inside the moduli spaces of curves, paying attention specially to arithmetic properties. He considers, in particular, certain curves which were associated by W. Veech with rational polygonal billiards.
openaire   +2 more sources

TORSION OF ELLIPTIC CURVES OVER QUADRATIC CYCLOTOMIC FIELDS

, 2010
In this paper we study the possible torsions of elliptic curves over ℚ(i) and ℚ(√−3)
Najman, Filip, Filip Najman
core   +1 more source

Serological Benefit of SARS‐CoV‐2 Vaccination Relative to Infection in Children With Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with acute lymphoblastic leukemia (ALL) are at risk of severe outcomes from SARS‐CoV‐2 (SCV2). In the post‐pandemic context, where most children have been infected with SCV2, there are limited data on whether vaccination remains beneficial in children with ALL.
Janna R. Shapiro, Freda Qi, Karen Colwill, Alina D. Dorogy, Ying Liu, Michelle Science, Anne‐Claude Gingras, James M. Rini, Sumit Gupta, Sarah Alexander, Shelly Bolotin, Tania H. Watts   +11 more
wiley   +1 more source

A metric graph satisfying w41=1$w_4^1 = 1$ that cannot be lifted to a curve satisfying dim⁡ (W41)=1$\dim \;(W_4^1 ) = 1$

Open Mathematics, 2016
For all integers g ≥ 6 we prove the existence of a metric graph G with w41=1$w_4^1 = 1$ such that G has Clifford index 2 and there is no tropical modification G′ of G such that there exists a finite harmonic morphism of degree 2 from G′ to a metric ...
Coppens Marc
doaj   +1 more source

R^2 de Bir n-li Eğri Ailesinin Afin Diferansiyel İnvaryantları

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2018
Bu çalışmada tane eğrinin üreteç diferansiyel invaryantlarıbelirlenmiş olup, bu üreteç kümesinin fonksiyonel bağımsız olduğugösterilmiştir. Ayrıca bu diferansiyel invaryantlar kullanılarak de iki tane lieğri ailesinin denklik problemi araştırılmıştır.
Uğur Gözütok, Yasemin Sağıroğlu
doaj   +1 more source