3,516 research outputs found
On computation of limiting coderivatives of the normal-cone mapping to inequality systems and their applications
The paper concerns the computation of the limiting coderivative of the
normal-cone mapping related to inequality constraints under weak
qualification conditions. The obtained results are applied to verify the Aubin
property of solution maps to a class of parameterized generalized equations
On the Aubin property of a class of parameterized variational systems
The paper deals with a new sharp criterion ensuring the Aubin property of
solution maps to a class of parameterized variational systems. This class
includes parameter-dependent variational inequalities with non-polyhedral
constraint sets and also parameterized generalized equations with conic
constraints. The new criterion requires computation of directional limiting
coderivatives of the normal-cone mapping for the so-called critical directions.
The respective formulas have the form of a second-order chain rule and extend
the available calculus of directional limiting objects. The suggested procedure
is illustrated by means of examples.Comment: 20 pages, 1 figur
Stability analysis for parameterized variational systems with implicit constraints
In the paper we provide new conditions ensuring the isolated calmness
property and the Aubin property of parameterized variational systems with
constraints depending, apart from the parameter, also on the solution itself.
Such systems include, e.g., quasi-variational inequalities and implicit
complementarity problems. Concerning the Aubin property, possible restrictions
imposed on the parameter are also admitted. Throughout the paper, tools from
the directional limiting generalized differential calculus are employed
enabling us to impose only rather weak (non-restrictive) qualification
conditions. Despite the very general problem setting, the resulting conditions
are workable as documented by some academic examplesComment: 26 page
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REAPOR® - Sintered open-pore glass foam as a high-strength sound absorber
The market for sound insulation products and Services, accounting for some 6000 mill. DM per annum in Germany alone, is covered to the extent of more than 90% by developments which are over 40 years old. Experts at the Fraunhofer Insdtute for Building Physics (IBP) (Director: Prof Dr. Dr. h. c. mult. Dr. E. h. mult. K. Gertis) have, together with an increasing number of small to medium-sized licensees, concentrated on the development of alternative, fibre-free absorbers (ALFA). The aim is to thus reduce noise pollution with more efficient sound-proofing technologies even in cases where traditional sound insulation materials are at a disadvantage as regards fitting and durabihty
On (local) analysis of multifunctions via subspaces contained in graphs of generalized derivatives
The paper deals with a comprehensive theory of mappings, whose local behavior
can be described by means of linear subspaces, contained in the graphs of two
(primal and dual) generalized derivatives. This class of mappings includes the
graphically Lipschitzian mappings and thus a number of multifunctions,
frequently arising in optimization and equilibrium problems. The developed
theory makes use of own generalized derivatives, provides us with some calculus
rules and reveals a number of interesting connections. In particular, it
enables us to construct a modification of the semismooth* Newton method with
improved convergence properties and to derive a generalization of Clarke's
Inverse Function Theorem to multifunctions together with new efficient
characterizations of strong metric (sub)regularity and tilt stability
On the isolated calmness property of implicitly defined multifunctions
The paper deals with an extension of the available theory of SCD (subspace
containing derivatives) mappings to mappings between spaces of different
dimensions. This extension enables us to derive workable sufficient conditions
for the isolated calmness of implicitly defined multifunctions around given
reference points. This stability property differs substantially from isolated
calmness at a point and, possibly in conjunction with the Aubin property,
offers a new useful stability concept. The application area includes a broad
class of parameterized generalized equations, where the respective conditions
ensure a rather strong type of Lipschitztan behavior of their solution maps.Comment: arXiv admin note: text overlap with arXiv:2106.0051
Rural areas of Eastern Germany: modern challenges
After the German reunification the agricultural
development of eastern territories
seemed to have picked up its pace. Yet the
main problems those territories are facing
today hatched already in the mid-1990s. In
our study we address the problems and challenges
that hinder sustainable development
of East German rural areas. We analyse agricultural
statistics and describe the structure
of agricultural enterprises, land-use,
and other critical dimensions of agriculture.
We discuss pros and cons of modern rural
areas spatial planning policy and take a critical
look at the current status of rural areas.
We also put forward a number of concrete
proposals aimed at the development of the
area and counteracting the negative trends it
is now experiencing. Even taking into account
all ‘positive’ development trends that
are postulated to have occurred since the
unification, we underline the crucial necessity
of diversification of labour forces and of
changing the spatial planning policies in the
rural areas of East Germany
Cohomology of Line Bundles: Applications
Massless modes of both heterotic and Type II string compactifications on
compact manifolds are determined by vector bundle valued cohomology classes.
Various applications of our recent algorithm for the computation of line bundle
valued cohomology classes over toric varieties are presented. For the heterotic
string, the prime examples are so-called monad constructions on Calabi-Yau
manifolds. In the context of Type II orientifolds, one often needs to compute
equivariant cohomology for line bundles, necessitating us to generalize our
algorithm to this case. Moreover, we exemplify that the different terms in
Batyrev's formula and its generalizations can be given a one-to-one
cohomological interpretation.
This paper is considered the third in the row of arXiv:1003.5217 and
arXiv:1006.2392.Comment: 56 pages, 8 tables, cohomCalg incl. Koszul extension available at
http://wwwth.mppmu.mpg.de/members/blumenha/cohomcalg
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