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Mostrando ítems 191-200 de 671
Artículo
An algorithm computing homotopy groups
(Elsevier, 1996)
An algorithm computing homotopy groups of a reduced simplicial set with effective homology is described, using the Whitehead tower method.
Artículo
On the isodiametric and isominwidth inequalities for planar bisections
(Cornell University, 2019)
For a given planar convex compact set K, consider a bisection {A,B} of K (i.e., A [ B = K and whose common boundary A \ B is an injective continuous curve connecting two boundary points of K) minimizing the corresponding ...
Artículo
On the influence of the thickness of the sediment moving layer in the definition of the bedload transport formula in Exner systems
(Elsevier, 2014)
In this paper we study Exner system and introduce a modified general definition for bedload transport flux. The new formulation has the advantage of taking into account the thickness of the sediment layer which avoids mass ...
Artículo
Connectivity calculus of fractal polyhedrons
(2015)
The paper analyzes the connectivity information (more precisely, numbers of tunnels and their homological (co)cycle classification) of fractal polyhedra. Homology chain contractions and its combinatorial counterparts, ...
Artículo
Homomorphisms between graphs embedded in surfaces
(Elsevier, 2024-05)
We extend the notion of graph homomorphism to cellularly embedded graphs (maps) by designing operations on vertices and edges that respect the surface topology; we thus obtain the first definition of map homomorphism that ...
Artículo
Lorentz spaces of vector measures and real interpolation of operators
(Taylor and Francis, 2020)
Using the representation of the real interpolation of spaces of p-integrable functions with respect to a vector measure, we show new factorization theorems for p th power factorable operators acting in interpolation couples ...
Artículo
Compact set of invariants characterizing graph states of up to eight qubits
(American Physical Society, 2009)
The set of entanglement measures proposed by Hein, Eisert, and Briegel for n-qubit graph states [Phys. Rev. A 69, 062311 (2004)] fails to distinguish between inequivalent classes under local Clifford operations if n≥7. On ...
Artículo
Topology-based image segmentation using LBP pyramids
(Springer, 2016)
In this paper, we present a new image segmentation algorithmwhich is based on local binary patterns (LBPs) and the combinatorial pyramid and which preserves structural correctness and image topology. For this purpose, ...
Artículo
Mathematica and Heisenberg Type Superalgebras
(Heldermann Verlag, 2006)
With the support of software Mathematica 4.0 we obtain important properties of Heisenberg type superalgebras, this type of superalgebras corresponds to the family of Lie superalgebras that generalize Heisenberg algebras. ...
Artículo
Proper Homotopy Classification of Graphs
(London Mathematical Society, 1990)
This work presents a classification of the proper homotopy types of locally finite 1-dimensional CW-complexes.