In the title compound, C(8)H(12)N(+)·C(6)H(2)N(3)O(7) (-), there are N-H⋯O and C-H⋯O inter-actions which generate R(2) (1)(5), R(2) (1)(6) and R(1) (2)(6) ring motifs. The supra-molecular aggregation is completed by the presence of edge-to-face and offset face-to-face π-π inter-actions with centroid-centroid distances of 3.673 and 3.697 Å, respectively.

Perfect 1-error correcting codes C in the hyper cube Zn 2 are considered. The possibilities for the number γ(C) of code words in a k-face γ of the hyper cube are discussed. It is shown that the possibilities for the number γ(C) depend on the dimension of the face γ, the rank of C and the dimension of the kernel of C. Especially we get an answer to a question of Sergey V. Avgustinovich whether t...

Let G=(V,E,F) be an embedding of a graph and a,b,c belong to {0,1}. A labeling type (a,b,c) is assignment labels from the set {1,2,...,a|V|+b|E|+c|F|} so that each vertex receives labels, edge b face c no label used more than once. If weight every s-sided face, defined as sum with vertices edges border equal some fixed constant w(s), then said face-magic. We investigate face-magic labelings all...

The question whether the recognition of individual faces is mandatory or task-dependent is still controversial. We employed the N250r component of the event-related potential as a marker of the activation of representations of facial identity in visual memory, in order to find out whether identity-related information from faces is encoded and maintained even when facial identity is task-irrelev...

The terminology and notation used but undefined in this paper can be found in [1]. Let G be a graph and we use V (G), E(G), F (G), ∆(G) and δ(G) to denote the vertex set, edge set, face set, maximum degree, and minimum degree of G, respectively. Let dG(x) or simply d(x), denote the degree of a vertex (resp. face) x in G. A vertex (resp. face) x is called a k-vertex (resp. k-face), k-vertex (res...

Adaptation-related aftereffects (AEs) have been found in the perception of face identity, in that perception of an ambiguous face is typically biased away from the identity of a preceding unambiguous adaptor face. In previous studies, we could show that both perceptual ambiguity and physical similarity play a role in determining perceived face identity AEs, Cortex 49 (2013) 1963-1977, Plos One ...