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91.
92.
P.D Seymour 《Journal of Combinatorial Theory, Series B》1980,28(3):305-359
It is proved that every regular matroid may be constructed by piecing together graphic and cographic matroids and copies of a certain 10-element matroid. 相似文献
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A strictly two-coordinate nickel(II) bis(amido) complex has been prepared and its reactivity towards a variety of small molecules is described. Ni[N(SiMe(3))(DIPP)](2) reacts with DMAP and acetonitrile to form T-shaped three-coordinate complexes, and preliminary results show that Ni[N(SiMe(3))(DIPP)](2) is a catalyst for the hydrosilation of olefins with secondary silanes at ambient temperature. 相似文献
97.
Mowat JP Seymour VR Griffin JM Thompson SP Slawin AM Fairen-Jimenez D Düren T Ashbrook SE Wright PA 《Dalton transactions (Cambridge, England : 2003)》2012,41(14):3937-3941
The scandium analogue of the flexible terephthalate MIL-53 yields a novel closed pore structure upon removal of guest molecules which has unusual thermal behaviour and stepwise opening during CO(2) adsorption. By contrast, the nitro-functionalised MIL-53(Sc) cannot fully close and the structure possesses permanent porosity for CO(2). 相似文献
98.
Maria Chudnovsky Alexandra FradkinPaul Seymour 《Journal of Combinatorial Theory, Series B》2012,102(1):93-101
A (loopless) digraph H is strongly immersed in a digraph G if the vertices of H are mapped to distinct vertices of G, and the edges of H are mapped to directed paths joining the corresponding pairs of vertices of G, in such a way that the paths used are pairwise edge-disjoint, and do not pass through vertices of G that are images of vertices of H. A digraph has cutwidth at most k if its vertices can be ordered {v1,…,vn} in such a way that for each j, there are at most k edges uv such that u∈{v1,…,vj−1} and v∈{vj,…,vn}.We prove that for every set S of tournaments, the following are equivalent:
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- there is a digraph H such that H cannot be strongly immersed in any member of S,
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- there exists k such that every member of S has cutwidth at most k,
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- there exists k such that every vertex of every member of S belongs to at most k edge-disjoint directed cycles.
99.
Maria Chudnovsky Paul Seymour Sophie Spirkl Mingxian Zhong 《Discrete Mathematics》2018,341(8):2179-2196
The graphs with no five-vertex induced path are still not understood. But in the triangle-free case, we can do this and one better; we give an explicit construction for all triangle-free graphs with no six-vertex induced path. Here are three examples: the 16-vertex Clebsch graph, the graph obtained from an 8-cycle by making opposite vertices adjacent, and the graph obtained from a complete bipartite graph by subdividing a perfect matching. We show that every connected triangle-free graph with no six-vertex induced path is an induced subgraph of one of these three (modulo some twinning and duplication). 相似文献
100.
Jennifer L. Seymour František Tureček Andrei V. Malkov Pavel Kočovský 《Journal of mass spectrometry : JMS》2004,39(11):1382-1382
The original article to which this Erratum refers was published in Journal of Mass Spectrometry 2004; 39: 1044–1052. 相似文献