E-mail
: mat300@uni-essen.de
Tel. : +49 201 183-2422
Attila
Wiebe
E-mail
: attila.wiebe@uni-essen.de
Tel. : +49 201 183-4114
Xinxian Zheng
E-mail
: xinxian.zheng@uni-essen.de
Tel. : +49 201 183-4114
Ahad Rahimi
E-mail
: ahad.rahimi@uni-essen.de
Tel. : +49 201 183-4519
Ali Soleyman Jahan
E-mail :
ali.soleyman-jahan@studd.uni-duisburg-essen.de
Tel. : +49 201 183-2512
Recent Preprints:
Dorin Popescu
Dorin Popescu
Monomial
cycle basis on Koszul homology modules;
(PS document)
Dorin Popescu
Criterions
for shellable multicomplexes;
(PS document)
Jürgen Herzog and Dorin Popescu
Ahad Rahimi
On
the regularity of local cohomology of bigraded algebras;
(pdf
document)
Jürgen Herzog and Xinxian Zheng
Notes
on the multiplicity conjecture;
(pdf document)
Jürgen Herzog, Yukihide Takayama and Naoki Terai
On
the radical of a monomial ideal;
(pdf document)
Jürgen Herzog and Takayuki Hibi
The
depth of powers of an ideal;
(PS document)
Jürgen Herzog and Takayuki Hibi
Cohen-Macaulay
polymatroidal ideals;
(PS document)
Jürgen Herzog, Giancarlo Rinaldo and Gaetana Restuccia
On the
depth and regularity of the symmetric algebra;
(PS
document)
Jürgen Herzog, Takayuki Hibi and Xinxian Zheng
Cohen-Macaulay
Chordal Graphs;
(PS document)
Jürgen Herzog
Free
resolutions (Lectures Trieste 2004);
(PS document)
Xinxian Zheng
Monomial
ideals arising from distributive lattices;
(PS document)
Jürgen Herzog, Takayuki Hibi
Jürgen Herzog, Takayuki Hibi and Xinxian Zheng
The
monomial ideal of a finite meet-semilattice;
(PS document)
Jürgen Herzog, Takayuki Hibi
Attila Wiebe
Aldo Conca, Jürgen Herzog, Takayuki Hibi
Rigid
resolutions and big Betti numbers;
(PS document)
Jürgen Herzog, Takayuki Hibi and Xinxian Zheng
Dirac's
theorem on chordal graphs and Alexander duality;
(PS
document)
Jürgen Herzog, and Naser Zamani
Duality
and Vanishing of Generalized Local Cohomology;
(PS
document)
Jürgen Herzog, Takayuki Hibi and Marius Vladoiu
Ideals
of fiber type and polymatroids;
(PS document)
Jürgen Herzog, Takayuki Hibi and Xinxian Zheng
Monomial
Ideals whose Powers have a linear resolution;
(PS document)
Jürgen Herzog and Hema Srinivasan
Multiplicities
of Monomial Ideals;
(PS document)
Xinxian Zheng
Resolutions
of Facet Ideals;
(PS document)
Jürgen Herzog, Zhongming Tang and Santiago Zarzuela
Dale Cutkosky, Jürgen Herzog and Ana Reguera
Poincare
series of resolutions of surface singularities;
(PS
document)
Jürgen Herzog and Srikanth Iyengar
Koszul
modules;
(PS document)
Jürgen Herzog, Dorin Popescu and Marius Vladoiu
On the
Ext-modules of ideals of Borel type;
(PS document)
Jürgen Herzog and Takayuki Hibi
Castelnuovo-Mumford
regularity of simplicial semigroup rings with isolated singularity;
(PS document)
Jürgen Herzog and Yukihide Takayama
Approximations
of generalized Cohen-Macaulay modules;
(PS document)
Jürgen Herzog and Takayuki Hibi:
Discrete
Polymatroids;
(PS document)
Aldo Conca and Jürgen Herzog:
Castelnuovo-Mumford
regularity of products of ideals;
(PS document)
Jürgen Herzog and Enrico Sbarra:
Jürgen Herzog and Yukihide Takayama:
Resolutions
by mapping cones;
(PS document)
Stefan Blum:
Subalgebras
of bigraded Koszul algebras
(DVI document, 64 KB)
Tim Römer:
Homological
properties of bigraded algebras
(DVI document, 69 KB)
Jürgen Herzog, Le Tuan Hoa, Ngo Viet Trung:
Jürgen Herzog, Liam O'Carroll, Dorin Popescu:
Jürgen Herzog, Dorin Popescu, Ngo Viet Trung:
Regularity
of Rees algebras
(PS document)
Enrico Sbarra:
On the
structure of Ext groups of strongly stable ideals
(DVI
document, 47 KB)
Jürgen Herzog, Gaetana Restuccia, Zhongming Tang:
S-sequences
and symmetric algebras
(DVI document, 108 KB)
Jürgen Herzog, Dorin Popescu:
On the
regularity of p-Borel ideals
(DVI document, 49 KB)
Tim Römer:
Bounds
for Betti numbers
(DVI document, 70 KB)
Stefan Blum:
Base-sortable
matroids and Koszulness of semigroup rings
(DVI
document, 220 KB)
Stefan Blum:
Initially
Koszul Algebras
(AMS-LaTex document)
Tim Römer:
Cohen-Macaulayness
and squarefree modules
(DVI document, 43 KB)
Jürgen Herzog, Gaetana Restuccia:
Regularity
Functions for homogeneous Algebras
(AMS-LaTex document)
Tim Römer:
Generalized
Alexander Duality and Applications
(AMS-LaTex
document)
Enrico Sbarra:
Upper
bounds for local cohomology for rings with given Hilbert function
(DVI document, 103 KB)
Annetta Aramova, Jürgen Herzog, Takayuki Hibi:
Shifting
operations and graded Betti numbers
(AMS-LaTex document)
Annetta Aramova, Jürgen Herzog, Takayuki Hibi :
Ideals
with stable Betti numbers
(AMS-LaTex document)
Annetta Aramova, Jürgen Herzog :
Almost
regular sequences and Betti numbers
(AMS-LaTex
document)
Annetta Aramova, Kristina Crona, Emanuela De Negri :
Bigeneric
initial ideals, diagonal subalgebras and bigraded Hilbert
functions
(AMS-LaTex document)
Annetta Aramova, Jürgen Herzog, Takayuki Hibi :
Infinite
shellable posets and extendable sequentially Koszul algebras
(AMS-LaTex document)
Shortterm Visitors:
Giancarlo Rinaldo, Messina University (2002)
Dorin Popescu, Bucarest University (2002)
Marius Vladoiu, Bucarest University (2002)
Takayuki Hibi, Osaka University (2002)
Mailing Address:
Universität GH-Essen
Fachbereich 6, Mathematik
45117
Essen, Germany