Heisenberg-like inequalities are derived from commutator identities, linking the quadratic dispersion in momentum to several functions of the position variable (or conversely). They have various physical and mathematical applications, and provide new links between the quadratic widths and the overall and mean peak widths of wave-functions.
Membrane proteins that are tagged with ubiquitin are diverted from the secretory pathway into lysosomes. New work shows that it is the GGA proteins that initiate sorting in the Golgi, and suggests that similar principles apply to multiple sorting steps.
In this paper a new notion of part structure for Roshe Run Women the semantics of natural language is presented: a notion of part structure that is relative to a situation and unlike extensional mereological notions, crucially involves conditions of integrity. The notion is motivated by a variety of different constructions of natural language.
In this paper we discuss a model for the loop sace of a geometric realization. We present a Nike Roshe Run Woven geometric proof of a result of Baues and thereby obtain a stronger version. The concepts used are the theory of cofibrations, fibrations and homotopy cartesian squares. As a consequence, we also get a geometric proof of a result of Adams concerning the homology of the loop space of a simply connected space.