On the hydrodynamic limit of a one-dimensional Ginzburg-Landau lattice model The a priori bounds

To be submitted to Journal of Statistical Physics, October 17, 1986SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

A note on selectors and greedoids

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Spectra of graphs and fractal dimensions. II Strongly recurrent random walks on graphs

SIGLETIB Hannover: RN 7349(535) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Towards a unified dynamical theory of the Brownian particle in an ideal gas

SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Classes of conditional expectations over von Neumann algebras

SIGLETIB Hannover: RN 7349 (448) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

On the eigenvalues of half-linear boundary value problems

We consider the half-linear boundary value problem x'' vertical stroke x' vertical stroke "n"-"1+#lambda#"n"+"1q(t)x"n=0 x(0)=x(b)=0 where x"n= vertical stroke x vertical stroke "n sgn x and the weight function q is assumed to change sign. We prove the existence of two sequences (#lambda#"+_k)k element of N, (#lambda#"-_k)k element of N of eigenvalues and derive asymptotic estimates for #lambda#"#+-#_k as k#->##infinity#Available from TIB Hannover: RO 1945(219) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Reactor physics concept for a low enriched compact core

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Parallel communicating grammar systems as Language analyzers

Parallel communicating grammar systems consist of several grammars and perform derivation steps, where each of the grammars works in a parallel and synchronized manner on its own sentential form, and communication steps, where a transfer of sentential forms is done. We discuss accepting and analyzing versions of such grammar systems with context-free productions. In accepting parallel communicating grammar systems rules of the form #alpha##->#A with a word #alpha# and a nonterminal A are applied as in the generating case, and the language consists of all terminal words which can derive the axiom. We consider the usual variant and a restricted variant of accepting parallel communicating grammar systems and prove that all types of these accepting grammar systems characterize the family of recursively enumerable languages, if the usual variant is considered, and that of context-free languages, if the restricted one is used. The first result also holds if #lambda# rules are forbidden. Moreover, we study analyzing parallel communicating grammar systems the derivations of which perform the generating counterparts backwards. This requires a modification of the concept of generating derivation yielding to strong-returning parallel communicating grammar systems which also generate the family of recursively numerable languages. (orig.)SIGLEAvailable from TIB Hannover: RR 4485(1999,18) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

The dipole formalism for next-to-leading order QCD calculations with massive partons

The dipole subtraction method for calculating next-to-leading order corrections in QCD was originally only formulated for massless partons. In this paper we extend its definition to include massive partons, namely quarks, squarks and gluinos. We pay particular attention to the quasi-collinear region, which gives rise to terms that are enhanced by logarithms of the parton masses, M. By ensuring that our subtraction cross section matches the exact real cross section in all quasi-collinear regions we achieve uniform convergence both for hard scales Q #propor to# M and Q >> M. Moreover, taking the masses to zero, we exactly reproduce the previously-calculated massless results. We give all the analytical formulae necessary to construct a numerical program to evaluate the next-to-leading order QCD corrections to arbitrary observables in an arbitrary process. (orig.)Available from TIB Hannover: RA 2999(01-099) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman