Results 41 to 50 of about 5,088,496 (354)

On the continuity of Weil-Petersson volumes of the moduli space weighted points on the projective line

open access: yesComplex Manifolds, 2022
In this work we show that the Weil-Petersson volume (which coincides with the CM degree) in the case of weighted points in the projective line is continuous when approaching the Calabi-Yau geometry from the Fano geometry. More specifically, the CM volume
Tambasco Salvatore
doaj   +1 more source

On the explicit geometry of a certain blowing-up of a smooth quadric

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2023
Using the high symmetry in the geometry of a smooth projective quadric, we construct effectively new families of smooth projective rational surfaces whose nef divisors are regular, and whose effective monoids are finitely generated by smooth projective ...
De La Rosa-Navarro B. L.   +4 more
doaj   +1 more source

One dimensional metrical geometry [PDF]

open access: yes, 2007
One dimensional metrical geometry may be developed in either an affine or projective setting over a general field using only algebraic ideas and quadratic forms.
Wildberger, N J
core   +2 more sources

On the projective geometry of sprays

open access: yesDifferential Geometry and its Applications, 2000
AbstractAfter a careful study of the mixed curvatures of the Berwald-type (in particular, Berwald) connections, we present an axiomatic description of the so-called Yano-type Finsler connections. Using the Yano connection, we derive an intrinsic expression of Douglas' famous projective curvature tensor and we also represent it in terms of the Berwald ...
József Szilasi, Sz. Vattamány
openaire   +2 more sources

Automorphism groupoids in noncommutative projective geometry [PDF]

open access: yes, 2018
We address a natural question in noncommutative geometry, namely the rigidity observed in many examples, whereby noncommutative spaces (or equivalently their coordinate algebras) have very few automorphisms by comparison with their commutative ...
Cooney, Nicholas, Grabowski, Jan E.
core   +3 more sources

Pairwise transitive 2-designs [PDF]

open access: yes, 2015
We classify the pairwise transitive 2-designs, that is, 2-designs such that a group of automorphisms is transitive on the following five sets of ordered pairs: point-pairs, incident point-block pairs, non-incident point-block pairs, intersecting block ...
Devillers, Alice, Praeger, Cheryl E.
core   +1 more source

Bundles over Quantum RealWeighted Projective Spaces

open access: yesAxioms, 2012
The algebraic approach to bundles in non-commutative geometry and the definition of quantum real weighted projective spaces are reviewed. Principal U(1)-bundles over quantum real weighted projective spaces are constructed.
Tomasz Brzeziński, Simon A. Fairfax
doaj   +1 more source

Arnold's Projective Plane and 𝑟-Matrices

open access: yesAdvances in Mathematical Physics, 2010
We will explain Arnold's 2-dimensional (shortly, 2D) projective geometry (Arnold, 2005) by means of lattice theory. It will be shown that the projection of the set of nontrivial triangular 𝑟-matrices is the pencil of tangent lines of a quadratic curve on
K. Uchino
doaj   +1 more source

Projective Texturing Uncertain Geometry: silhouette-aware box-filtered blending using integral radial images [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
Projective texturing is a commonly used image based rendering technique that enables the synthesis of novel views from the blended reprojection of nearby views on a coarse geometry proxy approximating the scene.
M. Brédif
doaj   +1 more source

Projective Cross-Ratio on Hypercomplex Numbers

open access: yes, 2012
The paper presents a new cross-ratio of hypercomplex numbers based on projective geometry. We discuss the essential properties of the projective cross-ratio, notably its invariance under Mobius transformations.
Brewer, Sky
core   +1 more source

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