Titlebook: ;

硬化

SYN

Graphs and Combinatorial Optimization: from Theory to Applications

flutter

The Chromatic Polynomial of a Digraph,ber of such colorings with . colors can be done by counting so-called Neumann-Lara-coflows (NL-coflows), which build a polynomial in .. We will present a representation of this polynomial using totally cyclic subdigraphs, which form a graded poset .. Furthermore we will decompose our NL-coflow polyn

BOOST

On List ,-Coloring Convex Bipartite Graphs,with colors in {1, 2, …, .}. The problem is known to be NP-hard even for .?=?3 within the class of 3-regular planar bipartite graphs and for .?=?4 within the class of chordal bipartite graphs. In 2015 Huang, Johnson and Paulusma asked for the complexity of . 3. in the class of chordal bipartite grap

syncope

Total Chromatic Sum for Trees, provide infinite families of trees for which the minimum number of colors to achieve the total chromatic sum is equal to the total chromatic number. We construct infinite families of trees for which these numbers are not equal, disproving the conjecture from 2012.

間諜活動(dòng)

Myosin

百靈鳥

千篇一律

極小