ar X iv : m at h / 97 05 23 0 v 1 [ m at h . N T ] 1 6 M ay 1 99 7 Operations on Locally Free Classgroups by Bernhard Köck

ar X iv : h ep - p h / 97 05 45 5 v 1 2 8 M ay 1 99 7 LECTURE 1 Spectral Fluctuations of the QCD Dirac Operator

ar X iv : h ep - p h / 97 05 42 3 v 1 2 6 M ay 1 99 7 The γ ∗ π 0 → γ form factor

The γπ → γ form factor is obtained within the Lagrangian quark model with separable interaction known to provide a good description of the pion observables at low energies. The pion-quarks vertex is chosen in a Gaussian form. The form factor obtained is close to the available experimental data and reaches smoothly the Brodsky-Lepage limit at Q ≈ 10 GeV.

ar X iv : h ep - t h / 97 05 18 6 v 1 2 3 M ay 1 99 7 Bosonization in d > 2 dimensions ∗

I discuss in this talk a bosonization approach recently developed in refs.[1]-[7]. It leads to the (exact) bosonization rule for fermion currents in d ≥ 2 dimensions and also provides a systematic way of constructing the bosonic action in different regimes. Talk delivered at Trends in Theoretical Physics CERN Santiago de Compostela La Plata Meeting, La Plata, April-May 1997, to be published Inv...

ar X iv : m at h / 99 05 11 8 v 1 [ m at h . L O ] 1 9 M ay 1 99 9 REMARKS ON SETS RELATED TO TRIGONOMETRIC SERIES

We show that several classes of sets, like N 0-sets, Arbault sets, N-sets and pseudo-Dirichlet sets are closed under adding sets of small size.

ar X iv : h ep - t h / 95 05 05 9 v 1 1 0 M ay 1 99 5 orthochronous The Conformal Spin and Statistics Theorem