Results 21 to 30 of about 56,593 (121)

Shape operator of an $ (n-1) $-dimensional distribution on an $ n $-dimensional manifold and their classification [PDF]

open access: yesریاضی و جامعه
This paper aims to study of shape operator of an $ (n-1) $-dimensional distribution on an $ n $-dimensional smooth manifold. In this study firstly we state formulae for the shape operator and its symmetric and anti-symmetric components and in ...
Mehran Aminian, Mehran Namjoo
doaj   +1 more source

Groups acting on quasi-median graphs. An introduction [PDF]

open access: yes, 2017
Quasi-median graphs have been introduced by Mulder in 1980 as a generalisation of median graphs, known in geometric group theory to naturally coincide with the class of CAT(0) cube complexes.
Genevois, Anthony
core   +3 more sources

Weak hyperbolicity of cube complexes and quasi-arboreal groups [PDF]

open access: yes, 2013
We examine a graph $\Gamma$ encoding the intersection of hyperplane carriers in a CAT(0) cube complex $\widetilde X$. The main result is that $\Gamma$ is quasi-isometric to a tree.
Hagen, Mark F.
core   +3 more sources

On special quadratic birational transformations of a projective space into a hypersurface

open access: yes, 2012
We study transformations as in the title with emphasis on those having smooth connected base locus, called "special". In particular, we classify all special quadratic birational maps into a quadric hypersurface whose inverse is given by quadratic forms ...
A Alzati   +28 more
core   +1 more source

On the homotopy Lie algebra of an arrangement

open access: yes, 2005
Let A be a graded-commutative, connected k-algebra generated in degree 1. The homotopy Lie algebra g_A is defined to be the Lie algebra of primitives of the Yoneda algebra, Ext_A(k,k). Under certain homological assumptions on A and its quadratic closure,
Denham, Graham, Suciu, Alexander I.
core   +3 more sources

Homotopy Lie algebras, lower central series and the Koszul property

open access: yes, 2004
Let X and Y be finite-type CW-complexes (X connected, Y simply connected), such that the rational cohomology ring of Y is a k-rescaling of the rational cohomology ring of X. Assume H^*(X,Q) is a Koszul algebra. Then, the homotopy Lie algebra pi_*(Omega Y)
Alexander I Suciu   +24 more
core   +4 more sources

Gauß-Manin Connection arising from arrangements of hyperplanes

open access: yesIllinois Journal of Mathematics, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

The hyperplane string, RCFTs, and the swampland

open access: yesJournal of High Energy Physics
Six dimensional N $$ \mathcal{N} $$ = (1, 0) supergravity features BPS strings whose properties encode highly nontrivial information about the parent 6d theory.
Guglielmo Lockhart, Luca Novelli
doaj   +1 more source

Application of the particle swarm optimization algorithm-back propagation neural network algorithm introducing new parameter terms in the application field of industrial design

open access: yesResults in Engineering
With the development of the modern industry, to continuously use large precision instruments, the circuits protecting method through circuit design has gradually been promoted.
Yuan Tian, Yu Chang
doaj   +1 more source

Discrete traveling waves in a Toda’s relay chain

open access: yesPartial Differential Equations in Applied Mathematics
A relay version of the Toda’s chain is considered. For a system of m+1 identical oscillators connected in a ring, the applicability of the method of constructing periodic solutions in the form of discrete traveling waves is investigated.
A.A. Kutuzova   +2 more
doaj   +1 more source

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