We study a relationship between two genus 2 curves whose jacobians are isogenous with kernel equal to a maximal isotropic subspace of p-torsion points with respect to the Weil pairing. For p = 3 we find an explicit relationship between the set of Weierstrass points of the two curves extending the classical results of F. Richelot (1837) and G. Humbert (1901) in the case p = 2.

The aim of these notes is to describe some recent results concerning dispersive estimates for principally normal pseudodifferential operators. The main motivation for this comes from unique continuation problems. Such estimates can be used to prove L Carleman inequalities, which in turn yield unique continuation results for various partial differential operators with rough potentials.

In order to realistically fulfil global and national climate protection targets, all potential measures have be made use of a maximum extent. Because it is readily available, biomass energy has been playing key practical role for decades, supported by the traditional assumption its carbon neutrality: under sustainable conditions, dioxide emitted during combustion held equal absorption plant gro...