Results 261 to 270 of about 22,383 (289)
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Canadian Journal of Mathematics, 1975
A finite partially ordered set (poset) P is customarily represented by drawing a small circle for each point, with a lower than b whenever a < b in P, and drawing a straight line segment from a to b whenever a is covered by b in P (see, for example, G. Birkhoff [2, p. 4]). A poset P is planar if such a diagram can be drawn for P in which none of the
Kelly, David, Rival, Ivan
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A finite partially ordered set (poset) P is customarily represented by drawing a small circle for each point, with a lower than b whenever a < b in P, and drawing a straight line segment from a to b whenever a is covered by b in P (see, for example, G. Birkhoff [2, p. 4]). A poset P is planar if such a diagram can be drawn for P in which none of the
Kelly, David, Rival, Ivan
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On planarity and similarity restraints
Journal of Applied Crystallography, 2001 Planarity and similarity restraints are described using a unified framework for the computation layout. In both cases, the gradient and Hessian of the restraint residual with respect to atomic coordinates are derived.
Blanc, E., Paciorek, W.
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Results in Mathematics, 1996
All rings that are planar near-rings are characterized and constructed. For each vector space over a nontrivial division ring there is precisely one isomorphism class of such rings.
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All rings that are planar near-rings are characterized and constructed. For each vector space over a nontrivial division ring there is precisely one isomorphism class of such rings.
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Communications in Contemporary Mathematics, 2000
An embedding of a space Y into the 3-sphere S 3 is said to be strictly achiral if its image is pointwise fixed by an orientation reversing homeomorphism of S 3 . A space Y is said to be abstractly planar if it can be embedded into the 2-sphere S
Jiang, Boju, Wang, Shicheng
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An embedding of a space Y into the 3-sphere S 3 is said to be strictly achiral if its image is pointwise fixed by an orientation reversing homeomorphism of S 3 . A space Y is said to be abstractly planar if it can be embedded into the 2-sphere S
Jiang, Boju, Wang, Shicheng
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Journal of Chromatography A, 2004
Recent developments in planar electrochromatography (PEC) in both the normal-phase and the reversed-phase modes, and at both atmospheric and elevated pressure, are reviewed. Other forced-flow techniques in planar chromatography are also briefly covered.
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Recent developments in planar electrochromatography (PEC) in both the normal-phase and the reversed-phase modes, and at both atmospheric and elevated pressure, are reviewed. Other forced-flow techniques in planar chromatography are also briefly covered.
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On boolean characterizations of planarity and planar embeddings of graphs
Annals of Operations Research, 1990The author introduces a new planarity characterization for graphs, involving the solution of a quadratic Boolean equation. He then discusses seven combinatorially distinct configurations, called planarity obstacles, which lead to a graph whose order and size are linear functions of those of the original graph. Testing for planarity and finding a planar
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Simple, reliable, and universal metrics of molecular planarity
Journal of Molecular Modeling, 2021Tian Lu
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Quantifying Planarity in the Design of Organic Electronic Materials
Angewandte Chemie - International Edition, 2021Yuxuan Che, Dmytro Perepichka
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A Survey on Graph Drawing Beyond Planarity
ACM Computing Surveys, 2020Fabrizio Montecchiani +2 more
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Atomic Embeddability, Clustered Planarity, and Thickenability
Journal of the ACM, 2022Radoslav Fulek, Csaba Tóth
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