Results 11 to 20 of about 188,835 (324)
Brillouin Klein bottle from artificial gauge fields
Nature 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
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Curvature tensor of connection in principal bundle of Cartan's projective connection space
Дифференциальная геометрия многообразий фигур, 2019 We considered Cartan's projective connection space with structure equations generalizing the structure equations of the projective space and the condition of local projectivity (this condition is an analogue to the equiprojectivity condition in the ...
K. Bashashina
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On the level of projective spaces
Commentarii 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.
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Cofinitely and co-countably projective spaces
Applied General Topology, 2002 We show that X is cofinitely projective if and only if it is a finite union of Alexandroff compactatifications of discrete spaces. We also prove that X is co-countably projective if and only if X admits no disjoint infinite family of uncountable cozero ...
Pablo Mendoza Iturralde +1 more
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Projective dimension in filtrated K-theory [PDF]
, 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
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On Projections In Spaces Of Pencils
Demonstratio Mathematica, 1998 The authors study an incidence structure where the points are \(k\)-dimensional subspaces of a given vector space, and each block is determined by a \((k-1)\)- and a \((k+1)\)-dimensional subspace (the former contained in the latter). They define projectivities and projective collineations, and show that projective collineations are determined by ...
Oryszczyszyn, Henryk +1 more
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Proceedings, 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
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ADHM construction of perverse instanton sheaves [PDF]
, 2012 We present a construction of framed torsion free instanton sheaves on a projective variety containing a fixed line which further generalizes the one on projective spaces. This is done by generalizing the so called ADHM variety.
ABDELMOUBINE AMAR HENNI +13 more
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On projective coordinate spaces
Filomat, 2015 In the present study, an (n+1)-dimensional module over the local ringK = Mmm(R) is constructed. Further, an n-dimensional projective coordinate space over this module is constructed with the help of equivalence classes. The points and lines of this space are determined and the points are classified.
Erdogan, FATMA, Ciftci, Suleyman
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Centered planes in the projective connection space
Дифференциальная геометрия многообразий фигур, 2020 The space of centered planes is considered in the Cartan projective connection space . The space is important because it has connection with the Grassmann manifold, which plays an important role in geometry and topology, since it is the basic space ...
O.O. Belova
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