Characterizations of Ordered Self-adjoint Operator Spaces

In this paper, we generalize the work of Werner and others to develop two abstract characterizations for self-adjoint operator spaces. The corresponding abstract objects can be represented as self-adjoint subspaces of $B(H)$ in such a way that both a metric structure and an order structure are preserved at each matrix level. We demonstrate a generalization of the Arveson Extension Theorem in this context. We also show that quotients of self-adjoint operator spaces can be endowed with a compatible operator space structure and characterize the kernels of completely positive completely bounded maps on self-adjoint operator spaces.Comment: 20 pages. Updated references and corrected typos. The statement of Corollary 3.17 has been strengthene

The importance of being alkaline

The earliest forms of "protolife" on Earth must have been able to reproduce and replicate; it is likely that they were also cellular. How might such systems have formed? In his Perspective, Russell highlights the report by Hanczyc et al., who show that clay particles can catalyze the formation of lipid vesicles. These particles also adsorb RNA. If the vesicles are forced to divide, RNA is distributed among the daughter vesicles. Similar conditions to those used in the experiments may have existed at mounds created by alkaline, hydrothermal seepages on the ancient ocean floor. However, instead of lipids, polypeptides formed from amino acids may have formed the first organic membranes

Review of The Price of Alliance: The Politics and Procurement of Leopard Tanks for Canada’s NATO Brigade by Frank Maas

Review of The Price of Alliance: The Politics and Procurement of Leopard Tanks for Canada’s NATO Brigade by Frank Maas

Review of Always at War: Organizational Culture in Strategic Air Command, 1946-62 by Melvin G. Deaile

Review of Always at War: Organizational Culture in Strategic Air Command, 1946-62 by Melvin G. Deaile