3,450 research outputs found
Detecting linear dependence by reduction maps
We consider the local to global principle for detecting linear dependence of
points in groups of the Mordell-Weil type. As applications of our general
setting we obtain corresponding statements for Mordell-Weil groups of non{-}CM
elliptic curves and some higher dimensional abelian varieties defined over
number fields, and also for odd dimensional K-groups of number fields.Comment: This is a revised version of the MPI preprint no. 14 from March 200
Regime variance testing - a quantile approach
This paper is devoted to testing time series that exhibit behavior related to
two or more regimes with different statistical properties. Motivation of our
study are two real data sets from plasma physics with observable two-regimes
structure. In this paper we develop estimation procedure for critical point of
division the structure change of a time series. Moreover we propose three tests
for recognition such specific behavior. The presented methodology is based on
the empirical second moment and its main advantage is lack of the distribution
assumption. Moreover, the examined statistical properties we express in the
language of empirical quantiles of the squared data therefore the methodology
is an extension of the approach known from the literature. The theoretical
results we confirm by simulations and analysis of real data of turbulent
laboratory plasma
Full Repression of RNA Polymerase III Transcription Requires Interaction between Two Domains of Its Negative Regulator Maf1
Maf1, first identified in yeast Saccharomyces cerevisiae, is a general negative regulator of RNA polymerase III (Pol III). Transcription regulation by Maf1 is important under stress conditions and during the switch between fermentation and respiration. Maf1 is composed of two domains conserved during evolution. We report here that these two domains of human Maf1 are resistant to mild proteolysis and interact together as shown by pull-down and size-exclusion chromatography and that the comparable domains of yeast Maf1 interact in a two-hybrid assay. Additionally, in yeast, a mutation in the N-terminal domain is compensated by mutations in the C-terminal domain. Integrity of both domains and their direct interaction are necessary for Maf1 dephosphorylation and subsequent inhibition of Pol III transcription on a nonfermentable carbon source. These data relate Pol III transcription inhibition to Maf1 structural changes
A support problem for the intermediate Jacobians of l-adic representations
This is a revised version of ANT-0332: "A support problem for the
intermediate Jacobians of l-adic representations", by G. Banaszak, W. Gajda &
P. Krason, which was placed on these archives on the 29th of January 2002.
Following a suggestion of the referee we have subdivided the paper into two
separate parts: "Support problem for the intermediate Jacobians of l-adic
representations", and "On Galois representations for abelian varieties with
complex and real multiplications".
Our results on the image of Galois and the Mumford-Tate conjecture for some
RM abelian varieties are contained in the second paper. Both papers were
accepted for publication
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