Results 61 to 70 of about 469,615 (274)
Energy Science &Engineering, EarlyView.ABSTRACT This attempt examines the heat transfer enhancement from unsteady bioconvective Maxwell nanofluid flow under the incidence of solar radiation influenced by viscous dissipation and chemical reaction through a porous medium. The nanofluid contains silver and titanium alloy hybrid nanoparticles with gyrotactic micro‐organisms in ethylene glycol ...
Bhupendra K. Sharma +4 more
wiley +1 more source
Topology of Innovation Spaces in the Knowledge Networks Emerging through Questions-And-Answers
PLoS ONE, 2016 The communication processes of knowledge creation represent a particular class of human dynamics where the expertise of individuals plays a substantial role, thus offering a unique possibility to study the structure of knowledge networks from online data.
M. Andjelković +4 more
semanticscholar +1 more source
A Sharper Ramsey Theorem for Constrained Drawings
Journal of Graph Theory, EarlyView.ABSTRACT Given a graph G $G$ and a collection C ${\mathscr{C}}$ of subsets of Rd ${{\mathbb{R}}}^{d}$ indexed by the subsets of vertices of G $G$, a constrained drawing of G $G$ is a drawing where each edge is drawn inside some set from C ${\mathscr{C}}$, in such a way that nonadjacent edges are drawn in sets with disjoint indices.
Pavel Paták
wiley +1 more source
Universal topological representation of geometric patterns [PDF]
, 2018 We discuss here geometric structures of condensed matters by means of a fundamental topological method. Any geometric pattern can be universally represented by a decomposition space of a topological space consisting of the infinite product space of 0 and 1, in which a partition with a specific topological structure determines a character of each ...
arxiv +1 more source
DIRECT SUMS OF AELIAN GROUPS [PDF]
, 2020 In mathematics, the Seifert-van Kampen theorem of Algebraic topology, sometimes it is called as van Kampen’s theorem. It expresses the structure of the fundamental group of a topological space X in terms of the fundamental groups of two open, path ...
P, PRIYA
core +1 more source
Algebraic and Topological Tools in Linear Optimization
Notices of the American Mathematical Society, 2019 The Linear Optimization Problem This is a story about the significance of diverse viewpoints in mathematical research. I will discuss how the analysis of the linear optimization problem connects in elegant ways to algebra and topology.
J. D. Loera
semanticscholar +1 more source
Edge‐Connectivity Between Edge‐Ends of Infinite Graphs
Journal of Graph Theory, EarlyView.ABSTRACT In infinite graph theory, the notion of ends, first introduced by Freudenthal and Jung for locally finite graphs, plays an important role when generalizing statements from finite graphs to infinite ones. Nash‐Williams' Tree‐Packing Theorem and MacLane's Planarity Criteria are examples of results that allow a topological approach, in which ends
Leandro Aurichi, Lucas Real
wiley +1 more source
We review the differential topology underlying the topological protection of energy band crossings in Weyl semimetals, and how they lead to the experimental signature of surface Fermi arcs.
arxiv +1 more source
DIRECT SUMS OF ABELIAN GROUPS [PDF]
, 2020 In mathematics, the Seifert-van Kampen theorem of Algebraic topology, sometimes it is called as van Kampen’s theorem. It expresses the structure of the fundamental group of a topological space X in terms of the fundamental groups of two open, path ...
P, PRIYA
core +1 more source
Conformal Hypergraphs: Duality and Implications for the Upper Clique Transversal Problem
Journal of Graph Theory, EarlyView.ABSTRACT Given a hypergraph H ${\rm{ {\mathcal H} }}$, the dual hypergraph of H ${\rm{ {\mathcal H} }}$ is the hypergraph of all minimal transversals of H ${\rm{ {\mathcal H} }}$. The dual hypergraph is always Sperner, that is, no hyperedge contains another.
Endre Boros +3 more
wiley +1 more source