Covariant collapse of the state vector and realism

We point out that the assumption that a quantum-mechanical state vector collapses in a Lorentz-covariant way upon measurement is consistent, but that it implies that the state vector, and any reality which it represents, depends on position. We consider the specific example of collapse along the forward light cone of the measurement.     

On the first eigenvalue of the linearized operator of ther-th mean curvature of a hypersurface

We generalize Reilly's inequality for the first eigenvalue of immersed submanifolds ofIR ^m +¹ and the total (squared) mean curvature, to hypersurfaces ofIR ^m +¹ and the first eigenvalue of the higher order curvatures. We apply this to stability problems. We also consider hypersurfaces in hyperbolic space.     

Fehlererkennung am gas-chromatographen durch auswertung des chromatogrammbildes

Ohne Zusammenfassungmit zusätzlichen Hinweisen vonD. R. Deans undR. Kaiser. Die Bauart von GC-Geräten kann so unterschiedlich sein, daß weder genannte Fehler auftreten können, noch bestimmte Gegenmittel wirksam sind.