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Wagner's theorem

In graph theory, Wagner's theorem is a mathematical forbidden graph characterization of planar graphs, named after Klaus Wagner, stating that a… 
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Clique (graph theory)Clique-sumForbidden graph characterizationGraph (discrete mathematics)

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
2019
2019
Elementary Results on Forbidden Minors
We start by building up some theory to state Wagner's Theorem, and then prove it using Kuratowski's Theorem, a proof of which is… 
2012
2012
Low-temperature study of magnetic properties of two-dimensional (2d) classical square Heisenberg lattices
We start this article by recalling rigorous results previously obtained for 2d square lattices composed of (2N+1)2 classical… 
2010
2010
Study of the magnetic properties of two-dimensional (2D) classical square heisenberg antiferromagnets II- spin correlations and susceptibility
In this part labelled II we examine the spin correlations and the susceptibility. We use a similar method which has allowed to… 
2010
2010
Magnetic properties of two-dimensional (2D) classical square Heisenberg lattices I- zero-field partition function
In this part labelled I we rigorously examine 2D square lattices composed of (2N+1)<sup>2</sup> classical spins isotropically… 
2004
2004
Аналог теоремы Вагнера о разложениях алгебры матриц@@@An analogue of Wagner's theorem for decompositions of matrix algebras
1993
1993
Wagner's theorem and combinatorial enumeration of 3-polytopes(Computational Geometry and Discrete Geometry)
1983
1983
Rationality as weighted averaging
Weighted averaging is a method for aggregating the totality of information, both regimented and unregimented, possessed by an… 
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