Results 11 to 20 of about 16,092 (131)
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
A multi-set extended relational algebra: a formal approach to a practical issue [PDF]
, 1993 The relational data model is based on sets of tuples, i.e. it does not allow duplicate tuples an a relation. Many database languages and systems do require multi-set semantics though, either because of functional requirements or because of the high costs
de By, R.A. +2 more
core +14 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
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
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
Complexity of equational theory of relational algebras with standard projection elements [PDF]
Synthese, 2015 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mikulás, Szabolcs, Sain, I., Simon, A.
openaire +1 more source
Differential Privacy for Relational Algebra: Improving the Sensitivity Bounds via Constraint Systems [PDF]
, 2012 Differential privacy is a modern approach in privacy-preserving data analysis to control the amount of information that can be inferred about an individual by querying a database.
Apt +15 more
core +6 more sources
Polystore mathematics of relational algebra [PDF]
, 2017 Financial transactions, internet search, and data analysis are all placing increasing demands on databases. SQL, NoSQL, and NewSQL databases have been developed to meet these demands and each offers unique benefits.
Gadepally, Vijay +5 more
core +3 more sources
Partial group algebra with projections and relations [PDF]
Rocky Mountain Journal of Mathematics, 2019 We introduce the notion of the partial group algebra with projections and relations and show that this C*-algebra is a partial crossed product. Examples of partial group algebras with projections and relations are the Cuntz-Krieger algebras and the unitization of C*-algebras of directed graphs.
openaire +4 more sources