Professor Al Nier and his influence on mass spectrometry

RAZI AND HIS BOOK ON AL-TIN AL NISHABURI

RAZI AND HIS BOOK ON AL- TIN AL NISHABURI

Alfred Nier and the sector field mass spectrometer.

Science and technology are intimately related, and advances in science often become possible with the availability of new instrumentation. This has certainly been the case in mass spectrometry, which is used in so many scientific disciplines. Originally developed as an instrument for research in physics it was used in the discovery of isotopes, their recognition as the fundamental species compr...

Dedicated to Professor Yu.i. Manin on His 60th Birthday

Let L = (L, ‖ · ‖v) be an ample metrized invertible sheaf on a smooth quasi-projective algebraic variety V over a number field F . Denote by N(V,L, B) the number of rational points in V having Lheight ≤ B. In this paper we consider the problem of a geometric and arithmetic interpretation of the asymptotic for N(V,L, B) as B → ∞ in connection with recent conjectures of Fujita concerning the Mini...

Dedicated to Professor Zhende Wu on His Seventieth Birthday

Suppose that (Φ,Mn) is a smooth (Z2)-action on a closed smooth n-dimensional manifold such that all Stiefel-Whitney classes of the tangent bundle to each connected component of the fixed point set F vanish in positive dimension. This paper shows that if dimMn > 2k dimF and each pdimensional part F p possesses the linear independence property, then (Φ,Mn) bounds equivariantly, and in particular,...