Anecdotal evidence suggests that the incidence of acute anaphylaxis is increasing. Reasons for this supposed increase are poorly understood although a number of factors associated with the “Western lifestyle” have been implicated, such as changes in diet and the increasing use of therapeutic drugs. We investigated trends in hospital admissions for acute anaphylaxis using routinely collected nat...

We construct three different families of commuting pairs of subnormal operators, jointly hyponormal but not admitting commuting normal extensions. Each such family can be used to answer in the negative a 1988 conjecture of R. Curto, P. Muhly and J. Xia. We also obtain a sufficient condition under which joint hyponormality does imply joint subnormality.

Quantum discord, a measure of genuinely quantum correlations, is generalized to continuous variable systems. For all two-mode Gaussian states, we calculate analytically the quantum discord and a related measure of classical correlations, solving an optimization over all Gaussian measurements. Almost all two-mode Gaussian states are shown to have quantum correlations, while for separable states,...

We construct a smoothly bounded pseudoconvex domain such that every boundary point has a p.s.h. peak function but some boundary point admits no (local) holomorphic peak function.

Type FPs A group Γ is of type FPs if Z, regarded as a ZΓ–module via the trivial action, admits a partial projective resolution Ps → Ps−1 → · · · → P1 → P0 → Z→ 0 by finitely generated ZΓ–modules Pi . Every group is of type FP0 . Type FP1 is equivalent to the property of finite generation. Every finitely-presented group is of type FP2 , but Bestvina–Brady showed the converse does not hold in gen...