Results 31 to 40 of about 8,504,062 (361)

Chow transformation of coherent sheaves

open access: yesComplex Manifolds, 2023
We define a dual of the Chow transformation of currents on any complex projective manifold. This integral transformation is a factor of a left inverse of the Chow transformation and its composition with the Chow transformation is a right inverse of a ...
Méo Michel
doaj   +1 more source

Topology and geometry of the canonical action of $T^4$ on the complex Grassmannian $G_{4,2}$ and the complex projective space $CP^{5}$ [PDF]

open access: yes, 2014
We consider the canonical action of the compact torus $T^4$ on the Grassmann manifold $G_{4,2}$ and prove that the orbit space $G_{4,2}/T^4$ is homeomorphic to the sphere $S^5$.
V. Buchstaber, S. Terzić
semanticscholar   +1 more source

Categories of projective spaces

open access: yesJournal of Pure and Applied Algebra, 1996
Starting with an abelian category \({\mathcal A}\), a natural construction [the second author, ``Transfer functors and projective spaces'', Math. Nachr. 118, 147-165 (1984; Zbl 0556.18005)] produces a category \(\mathbb{P} {\mathcal A}\) such that if \({\mathcal A}\) is a category of vector spaces, then \(\mathbb{P} {\mathcal A}\) is the corresponding ...
Marco Grandis, A. Carboni
openaire   +3 more sources

Extensions of maps to the projective plane [PDF]

open access: yes, 2005
It is proved that for a 3-dimensional compact metrizable space X the infinite real projective space is an absolute extensor of X if and only if the real projective plane is an absolute extensor of X.Comment: Published by Algebraic and Geometric Topology ...
Dydak, Jerzy, Levin, Michael
core   +1 more source

On the level of projective spaces

open access: yesCommentarii Mathematici Helvetici, 1987
By definition [see \textit{Z. D. Dai} and \textit{T. Y. Lam}, ibid. 59, 376--424 (1984; Zbl 0546.10017)] the level of a topological space \(X\) with a fixed point free involution \(i\) is the number \(s(X,i)=\min \{n:\) there is a \(\mathbb Z/2\)-equivariant map \(f: X\to S^{n-1}\}\). Here \(S^{n-1}\) has a \(\mathbb Z/2\)-action given by the antipodal
PFISTER, A., Stolz, S.
openaire   +2 more sources

Images of the Scenic Space between Reality and Illusion. Projective Transformations of the Scene in the Renaissance Theatre

open access: yesProceedings, 2017
This study focuses on an analysis of perceiving the infinite “solid images” derived from the projective transformations of space in a relief perspective, with particular reference to Renaissance theatre scenery.
Leonardo Baglioni, Marta Salvatore
doaj   +1 more source

Brillouin Klein bottle from artificial gauge fields

open access: yesNature Communications, 2022
Topological states are exploited based on crystalline symmetry, but under artificial gauge fields, symmetries may satisfy projective algebras, which remains less studied.
Z. Y. Chen   +2 more
doaj   +1 more source

Projective dimension in filtrated K-theory [PDF]

open access: yes, 2013
Under mild assumptions, we characterise modules with projective resolutions of length n in the target category of filtrated K-theory over a finite topological space in terms of two conditions involving certain Tor-groups.
Bentmann, Rasmus
core   +1 more source

Cycles in projective spaces [PDF]

open access: yesJournal of Geometry, 2013
6 ...
David Heywood   +3 more
openaire   +3 more sources

Hyperbolicity of generic high-degree hypersurfaces in complex projective space [PDF]

open access: yes, 2012
We use two ingredients to prove the hyperbolicity of generic hypersurfaces of sufficiently high degree and of their complements in the complex projective space.
Y. Siu
semanticscholar   +1 more source

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