Results 31 to 40 of about 15,345 (314)

Packings in Real Projective Spaces [PDF]

open access: yesSIAM Journal on Applied Algebra and Geometry, 2018
31 pages, 2 ...
Matthew Fickus   +2 more
openaire   +2 more sources

Calabi–Yau threefolds and moduli of abelian surfaces I [PDF]

open access: yes, 2001
We describe birational models and decide the rationality/unirationality of moduli spaces $\cal A$d (and $\cal A$levd) of (1, d)-polarized Abelian surfaces (with canonical level structure, respectively) for small values of d.
Sorin Popescu   +3 more
core   +1 more source

The projective space

open access: yesDuke Mathematical Journal, 1950
The most striking feature of projective geometry is the principle of duality: If in a proposition about the projective space (the projective plane) we interchange points and planes (points and lines) we obtain a valid proposition. It thus seems natural to ask for a self-dual foundation of the theories in the sense that for every postulate the above ...
openaire   +2 more sources

Harmonic measures for distributions with finite support on the mapping class group are singular [PDF]

open access: yes, 2014
Kaimanovich and Masur showed that a random walk on the mapping class group for an initial distribution whose support generates a nonelementary subgroup when projected into Teichmüller space converges almost surely to a point in the space PMF of ...
Gadre, Vaibhav
core   +1 more source

On the Projective Algebra of Randers Metrics of Constant Flag Curvature

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2011
The collection of all projective vector fields on a Finsler space (M,F) is a finite-dimensional Lie algebra with respect to the usual Lie bracket, called the projective algebra denoted by p(M,F) and is the Lie algebra of the projective group P(M,F).
Mehdi Rafie-Rad, Bahman Rezaei
doaj   +1 more source

Generalized transversely projective structure on a transversely holomorphic foliation

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
The results of Biswas (2000) are extended to the situation of transversely projective foliations. In particular, it is shown that a transversely holomorphic foliation defined using everywhere locally nondegenerate maps to a projective space ℂℙn, and ...
Indranil Biswas
doaj   +1 more source

On projections of metric spaces

open access: yesJ. Comput. Geom., 2011
Journal of Computational Geometry, Vol. 5 No. 1 (2014)
openaire   +3 more sources

Projections of a learning space. [PDF]

open access: yes, 2013
Any subset Q' of the domain Q of a learning space defines a projection of that learning space on Q' which is itself a learning space consistent with the original one. Moreover, such a construction defines a partition of Q having each of its classes defining a learning space also consistent with the original learning space.
openaire   +3 more sources

On the relative projective space

open access: yesTheory and Applications of Categories, 2019
Let $(\mathcal C,\otimes,\mathbb 1)$ be an abelian symmetric monoidal category satisfying certain exactness conditions. In this paper we define a presheaf $\mathbb P^{n}_{\mathcal C}$ on the category of commutative algebras in $\mathcal C$ and we prove that this functor is a $\mathcal C$-scheme in the sense of Toen and Vaquié.
Data, Matias Ignacio   +1 more
openaire   +4 more sources

A Simple Approach to Achieve Modified Projective Synchronization between Two Different Chaotic Systems

open access: yesThe Scientific World Journal, 2013
A new approach, the projective system approach, is proposed to realize modified projective synchronization between two different chaotic systems. By simple analysis of trajectories in the phase space, a projective system of the original chaotic systems ...
Lei Wang, Bin Zhen, Jian Xu
doaj   +1 more source

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