EJC
2010
13 years 4 months ago
2010
The main motivation here is a question: whether any polyhedron which can be subdivided into convex pieces without adding a vertex, and which has the same vertices as a convex poly...
EJC
2010
13 years 4 months ago
2010
EJC
2010
13 years 4 months ago
2010
EJC
2010
13 years 4 months ago
2010
EJC
2010
13 years 4 months ago
2010
Abstract. In this paper we study dualities of graphs and, more generally, relational structures with respect to full homomorphisms, that is, mappings that are both edge- and non-ed...
EJC
2010
13 years 4 months ago
2010
EJC
2010
13 years 4 months ago
2010
EJC
2010
13 years 4 months ago
2010
This article presents new bijections on planar maps. At first a bijection is established between bipolar orientations on planar maps and specific "transversal structures"...
EJC
2010
13 years 4 months ago
2010
Let G be a simple connected graph with n vertices and n edges which we call an unicyclic graph. In this paper, we first investigate the least eigenvalue n(G), then we present two ...
EJC
2010
13 years 4 months ago
2010
We introduce the idea of Assur graphs, a concept originally developed and exclusively employed in the literature of the kinematics community. The paper translates the terminology,...