The families of matroid independence complexes and pure shifted simplicial complexes are two remarkable classes of simplicial complexes that share several structural properties, but for which theorems are typically proved in different ways. In a groundbreaking paper Kook, Reiner and Stanton [4] proved that matroid complexes are Laplacian integral. Afterwards Duval and Reiner [1] proved the anal...

This report deals with serological and biochemical relationships between members of the genus Escherichia and Escherichia-like paracolon bacteria and the microorganisms that are usually classified as Shigella di8par. These studies are part of an investigation on the interrelationships within the family Enterobacteriaceae that was started in 1942 and which is still in progress. Shigella ceylonen...

Since the cultivation, about two years ago, of the leprosy bacillus, increased attention has been directed to the study of immunity processes in infection caused by this microSrganism. Experiments which aim at the development of some method for the specific treatment of the disease have already been undertaken by Dr. Duval and his associates in this laboratory, and by Clegg in the Philippines. ...

Nesta pesquisa, buscou-se fazer um diagnóstico sobre como alunos que já cursaram a disciplina de Cálculo I demonstravam seus conhecimentos relativos aos conceitos Pontos Críticos Funções partir da Teoria dos Registros Representação Raymond Duval. Para tanto, foi aplicado teste fim se obter os dados analisados qualitativamente e quantitativamente. Concluímos apresentam dificuldades para reconhec...

Newton’s equations for the motion of N non-relativistic point particles attracting according to the inverse square law may be cast in the form of equations for null geodesics in a (3N + 2)-dimensional Lorentzian spacetime which is Ricci-flat and admits a covariantly constant null vector. Such a spacetime admits a Bargmann structure and corresponds physically to a plane-fronted gravitational wav...

The work was conducted at La Pletera salt marsh (NE Spain) to investigate the potential for atmospheric carbon capture of perennial Sarcocornia fruticosa (L.) Scott and annual Salicornia patula Duval Jouve subsequent integration storage into S. soils respectively, 0–5 5–20 cm depth. amounts aboveground (aC), belowground (bC) litter (lC) were 2300%, 350% 3000% higher than according respective pl...