1,434 research outputs found
Critical points of inner functions, nonlinear partial differential equations, and an extension of Liouville's theorem
We establish an extension of Liouville's classical representation theorem for
solutions of the partial differential equation and combine
this result with methods from nonlinear elliptic PDE to construct holomorphic
maps with prescribed critical points and specified boundary behaviour. For
instance, we show that for every Blaschke sequence in the unit disk
there is always a Blaschke product with as its set of critical
points. Our work is closely related to the Berger-Nirenberg problem in
differential geometry.Comment: 21 page
Development of Use Cases, Part I
For determining requirements and constructs appropriate for a Web query language, or in fact
any language, use cases are of essence. The W3C has published two sets of use cases for XML
and RDF query languages. In this article, solutions for these use cases are presented using
Xcerpt. a novel Web and Semantic Web query language that combines access to standard Web
data such as XML documents with access to Semantic Web metadata
such as RDF resource
descriptions with reasoning abilities and rules familiar from logicprogramming.
To the
best knowledge of the authors, this is the first in depth study of how to solve use cases for
accessing XML and RDF in a single language: Integrated access to data and metadata
has been
recognized by industry and academia as one of the key challenges in data processing for the
next decade. This article is a contribution towards addressing this challenge by demonstrating
along practical and recognized use cases the usefulness of reasoning abilities, rules, and
semistructured
query languages for accessing both data (XML) and metadata
(RDF)
АЗОВСЬКА ГУБЕРНСЬКА КАНЦЕЛЯРІЯ: СТРУКТУРА, ФУНКЦІЇ, ШТАТ (1775-1784)
У статті висвітлюється історія створення та діяльності головної адміністративної установи Азовської губернії – губернської канцелярії (1775–1784 рр.), розкриваються її структура, основні функції та штат.In this article the history of formation and functioning of the main establishment of the Azov province – province office – is illuminated (1775–1784). Such questions as structure, main functions and stat are revealed
Survey over Existing Query and Transformation Languages
A widely acknowledged obstacle for realizing the vision of the Semantic Web is the inability
of many current Semantic Web approaches to cope with data available in such diverging
representation formalisms as XML, RDF, or Topic Maps. A common query language is the first
step to allow transparent access to data in any of these formats. To further the understanding
of the requirements and approaches proposed for query languages in the conventional as well
as the Semantic Web, this report surveys a large number of query languages for accessing
XML, RDF, or Topic Maps. This is the first systematic survey to consider query languages from
all these areas. From the detailed survey of these query languages, a common classification
scheme is derived that is useful for understanding and differentiating languages within and
among all three areas
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