In many regions, large proportions of the naturalized and invasive non-native floras were originally introduced deliberately by humans. Pest risk assessments are now used in many jurisdictions to regulate the importation of species and usually include an estimation of the potential distribution in the import area. Two species of Asian grass (Miscanthus sacchariflorus and M. sinensis) that were ...

For a nite von-Neumann algebra factor M, the projections form a modular ortholattice L(M) . We show that the equational theory of L(M) coincides with that of some resp. all L(Cn n) and is decidable. In contrast, the uniform word problem for the variety generated by all L(Cn n) is shown to be undecidable. This is a report on joint work with Luca Giudici. A few remarks, based on joint work with M...

Let / be a real valued integrable function on a compact homogeneous space M = K\G and M¡ the operator of pointwise multiplication by /. The authors consider families of Toeplitz operators T¡P = PM¡P as P ranges over a net of orthogonal projections from L2(M) to finite dimensional G-invariant subspaces. Necessary and sufficient conditions are given on the net in order that the distribution of ei...

This paper establishes properties of discrete orthogonal projections on periodic spline spaces of order r, with knots that are equally spaced and of arbitrary multiplicity M ≤ r. The discrete orthogonal projection is expressed in terms of a quadrature rule formed by mapping a fixed J -point rule to each sub-interval. The results include stability with respect to discrete and continuous norms, c...

Abstract Arctic coastal erosion damages infrastructure, threatens communities and releases organic carbon from permafrost. However, the magnitude, timing sensitivity of increase to global warming remain unknown. Here we project Arctic-mean rate very likely exceed its historical range variability before end century in a wide emission scenarios. The roughly doubles, reaching 0.4–0.8 m yr −1 °C 2....