Results 1 to 10 of about 16,172 (154)
Born’s Rule from Contextual Relative-Entropy Minimization [PDF]
EntropyWe give a variational characterization of the Born rule. For each measurement context, we project a quantum state ρ onto the corresponding abelian algebra by minimizing Umegaki relative entropy; Petz’s Pythagorean identity makes the dephased state the ...
Arash Zaghi
doaj +2 more sources
Zelevinski algebras related to projective representations [PDF]
Transactions of the American Mathematical Society, 1988 We define L L - PSH \operatorname {PSH} -algebras, and prove a classification theorem for such objects. The letters refer respectively to a ground ring L L and to the positivity, selfadjointness and Hopf structures on an algebra, the basic example of which occurred in the study of projective ...
Bean, M., Hoffman, P.
openaire +2 more sources
Algebraic optimization of recursive queries [PDF]
, 1992 Over the past few years, much attention has been paid to deductive databases. They offer a logic-based interface, and allow formulation of complex recursive queries.
Apers, Peter M.G. +2 more
core +10 more sources
Complexity of equational theory of relational algebras with standard projection elements [PDF]
Synthese, 2015 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Szabolcs Mikulás +2 more
openaire +1 more source
Truth Space Method for Caching Database Queries
Моделирование и анализ информационных систем, 2015 We propose a new method of client-side data caching for relational databases with a central server and distant clients. Data are loaded into the client cache based on queries executed on the server. Every query has the corresponding DB table – the result
S. V. Mosin, S. V. Zykin
doaj +1 more source
Joining Extractions of Regular Expressions [PDF]
, 2017 Regular expressions with capture variables, also known as "regex formulas," extract relations of spans (interval positions) from text. These relations can be further manipulated via Relational Algebra as studied in the context of document spanners, Fagin
Freydenberger, Dominik D. +2 more
core +2 more sources
Provenance for SPARQL queries [PDF]
, 2012 Determining trust of data available in the Semantic Web is fundamental for applications and users, in particular for linked open data obtained from SPARQL endpoints.
A.P. Antoine Zimmermann +7 more
core +1 more source
When Can Matrix Query Languages Discern Matrices? [PDF]
, 2020 We investigate when two graphs, represented by their adjacency matrices, can be distinguished by means of sentences formed in MATLANG, a matrix query language which supports a number of elementary linear algebra operators.
Geerts, Floris
core +1 more source
Manipulation of expressions in a relational algebra [PDF]
, 1979 This paper describes a syntax for expressions based on the relational algebra. A tree representation is generated when an expression is analyzed. Transformations on the tree representations of expressions are applied in order to obtain improvements with ...
Engmann, R., Stroet, J.W.M.
core +3 more sources
, 2012 Data stream management systems (DSMS) so far focus on event queries and hardly consider combined queries to both data from event streams and from a database.
Brodt, Simon, Bry, François
core +4 more sources