Results 31 to 40 of about 2,707 (220)

Rational points on singular intersections of quadrics

open access: yes, 2013
Given an intersection of two quadrics X ⊂ ℙm-1, with m ≥ 9, the quantitative arithmetic of the set X(ℚ) is investigated under the assumption that the singular locus of consists of a pair of conjugate singular points defined over &#
Browning, T. D., Munshi, R.
core   +1 more source

Topological Properties of the Intersection Curves Between a Torus and Families of Parabolic or Elliptical Cylinders

open access: yesAxioms
This paper reports the research work carried out with the goal of geometrically and algebraically describing, as well as topologically classifying, the curves resulting from the intersection of a torus with families of parabolic and elliptical cylinders ...
Ana Breda   +2 more
doaj   +1 more source

Non-existence of quasi-symmetric designs having certain pseudo-geometric block graphs

open access: yesAKCE International Journal of Graphs and Combinatorics
The block graph of a quasi-symmetric design is strongly regular. It is a challenging problem to decide which strongly regular graphs are block graphs of quasi-symmetric designs.
Kusum S. Rajbhar, Rajendra M. Pawale
doaj   +1 more source

Quadratic triangular Bezier patches on quadrics

open access: yesLietuvos Matematikos Rinkinys, 1997
There is not abstract.
Kęstutis Karčiauskas
doaj   +1 more source

Self‐supervised Learning of Fine‐to‐Coarse Cuboid Shape Abstraction

open access: yesComputer Graphics Forum, EarlyView.
Abstract The abstraction of 3D objects with simple geometric primitives like cuboids allows us to infer structural information from complex geometry. It is important for 3D shape understanding, structural analysis and geometric modeling. We introduce a novel fine‐to‐coarse self‐supervised learning approach to abstract collections of 3D shapes.
Gregor Kobsik   +6 more
wiley   +1 more source

Partitions of the Klein Quadric

open access: yesElectronic Notes in Discrete Mathematics, 2006
Abstract Remarkable intersection properties and the existence of some partitions of the Klein quadric are proved.
VINCENTI, Rita, H. J. KROLL
openaire   +3 more sources

The pencil of the 4th and 3rd order surfaces obtained as a harmonic equivalent of the pencil of quadrics through a 4th order space curve of the 1st category [PDF]

open access: yesFacta Universitatis. Series: Architecture and Civil Engineering, 2012
This paper shows the process of inverting the 4th ordered space curve of the first category with a self-intersecting point (with two planes of symmetry) and determining its harmonic equivalent.
Đukanović Gordana, Obradović Marija
doaj   +1 more source

Survey on differential estimators for 3d point clouds

open access: yesComputer Graphics Forum, EarlyView.
Abstract Recent advancements in 3D scanning technologies, including LiDAR and photogrammetry, have enabled the precise digital replication of real‐world objects. These methods are widely used in fields such as GIS, robotics, and cultural heritage. However, the point clouds generated by such scans are often noisy and unstructured, posing challenges for ...
Léo Arnal–Anger   +4 more
wiley   +1 more source

The Coble quadric

open access: yesForum of Mathematics, Sigma
Abstract Given a smooth genus three curve C, the moduli space of rank two stable vector bundles on C with trivial determinant embeds in ${\mathbb {P}}^8$ as a hypersurface whose singular locus is the Kummer threefold of C; this hypersurface is the Coble quartic. Gruson, Sam and Weyman realized that this quartic could be
Vladimiro Benedetti   +3 more
openaire   +4 more sources

BIHARMONIC CURVES INTO QUADRICS [PDF]

open access: yesGlasgow Mathematical Journal, 2014
AbstractWe develop an essentially algebraic method to study biharmonic curves into an implicit surface. Although our method is rather general, it is especially suitable to study curves in surfaces defined by a polynomial equation: In particular, we use it to give a complete classification of biharmonic curves in real quadrics of the three-dimensional ...
MONTALDO, STEFANO, RATTO, ANDREA
openaire   +2 more sources

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