Labelled seeds and the mutation group
نویسندگان
چکیده
منابع مشابه
Excluding a group-labelled graph
This paper contains a first step towards extending the Graph Minors Project of Robertson and Seymour to group-labelled graphs. For a finite abelian group Γ and Γ-labelled graph G, we describe the class of Γ-labelled graphs that do not contain a minor isomorphic to G.
متن کاملRadioactively Labelled Phytic Acid from Maturing Seeds of Sinapis alba
Maturing seeds of Sinapis alba were incubated with D-[U-14C]glucose, sodium [l-14C]acetate or m>>0-[U-14C]inositol in order to prepare radioactively labelled phytic acid with high specific activity. Although each substrate was utilized for the biosynthesis of phytic acid, maximum incorporation of radioactivity into phytic acid was found with rayo-inositol. Radiochemical purity of the [U-14C]phy...
متن کاملthe past hospitalization and its association with suicide attempts and ideation in patients with mdd and comparison with bmd (depressed type) group
چکیده ندارد.
Packing Non-Zero A-Paths In Group-Labelled Graphs
Let G=(V,E) be an oriented graph whose edges are labelled by the elements of a group Γ and let A⊆V . An A-path is a path whose ends are both in A. The weight of a path P in G is the sum of the group values on forward oriented arcs minus the sum of the backward oriented arcs in P . (If Γ is not abelian, we sum the labels in their order along the path.) We are interested in the maximum number of ...
متن کاملNon-zero disjoint cycles in highly connected group labelled graphs
Let G = (V, E) be an oriented graph whose edges are labelled by the elements of a group Γ. A cycle C in G has non-zero weight if for a given orientation of the cycle, when we add the labels of the forward directed edges and subtract the labels of the reverse directed edges, the total is non-zero. We are specifically interested in the maximum number of vertex disjoint non-zero cycles. We prove t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Mathematical Proceedings of the Cambridge Philosophical Society
سال: 2016
ISSN: 0305-0041,1469-8064
DOI: 10.1017/s0305004116000918