In this paper the properties of node-node adjacency matrix in acyclic digraphs are considered. It is shown that topological ordering and node-node adjacency matrix are closely related. In fact, first the one to one correspondence between upper triangularity of node-node adjacency matrix and existence of directed cycles in digraphs is proved and then with this correspondence other properties of ...

Dear Sir,?Some years agOj wlien at the General Hospital, Allahabad, I had occasion to destroy a monkey, (a common brown one), and for this purpose I selected hydrocyanic acid. Having had the monkey's month opened, about a drachm, or so, of the hydrocyanic acid was poured from the bottle into his pharynx ; but, to my great surprise, without any fatal effect. The monkey fell down in a semi-insens...

Given a local quantum field theory net A on the de Sitter spacetime dS, where geodesic observers are thermalized at Gibbons-Hawking temperature, we look for observers that feel to be in a ground state, i.e. particle evolutions with positive generator, providing a sort of converse to the HawkingUnruh effect. Such positive energy evolutions always exist as noncommutative flows, but have only a pa...

Service. In an article published on the 12th instant, it complains in bitter terms of the conduct of the authorities, and quotes many passages from your " leader" on the question, in support of its views. The Lancet, on the contrary, by some perversity of intelligence, looks at the matter in quite an opposite light, and has actually approved of the new Warrant as one calculated to be of benefit...