Results 121 to 130 of about 16,056 (155)

RELAX — the relational algebra pocket calculator project

ACM SIGCSE Bulletin, 2000
Database courses benefit from the abundance of commercial SQL systems available today. Unfortunately, the same cannot be said about the relational algebra query language. This article considers a lab experience to integrate the learning of these two important topics.
Victor Matos, Rebecca Grasser
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Projective algebra and the calculus of relations

Journal of Symbolic Logic, 1978
In [1] there were given postulates for an abstract “projective algebra” which, in the words of the authors, represented a “modest beginning for a study of logic with quantifiers from a boolean point of view”. In [5], D. Monk observed that the study initiated in [1] was an initial step in the development of algebraic versions of logic from which have ...
Bednarek, A. R., Ulam, S. M.
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Projectively stable artin algebras: representation theory and quivers with relations

Communications in Algebra, 1999
A left artinian ring Λ is projectively stable if no non-zero morphism f: M → N of finitely generated left Λ-modules M,N having no non-zero projective direct summands factors through a projective mo...
Shashidhar Jahadeeshan, Mark Kleiner
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Connections between quasi-projective relation algebras and cylindric algebras

Algebra universalis, 2007
In this paper we show that every quasi-projective relation algebra (QRA) has within it cylindric algebras (CAs) of all finite dimensions greater than two such that (i) they are term-definable in the QRA, (ii) they have a relation algebraic reduct that is isomorphic to the QRA and (iii) these isomorphisms are also term-definable.
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Weakly associative relation algebras with projections

Mathematical Logic Quarterly, 2009
AbstractBuilt on the foundations laid by Peirce, Schröder, and others in the 19th century, the modern development of relation algebras started with the work of Tarski and his colleagues [21, 22]. They showed that relation algebras can capture strong first‐order theories like ZFC, and so their equational theory is undecidable.
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On Irreducible Representation of a Class of Algebras and Related Projective Representations

Journal of Mathematical Physics, 1966
The number and the dimensions of irreducible representations of a general class of algebras occurring in the projective representations of finite groups have been determined. The Lie subalgebras have been found, and the isomorphism between the quantum-mechanical ray representations of finite groups and the fundamental representations of Lie algebras is
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A defect relation for meromorphic maps on generalized p-parabolic manifolds intersecting hypersurfaces in complex projective algebraic varieties

Proceedings of the Edinburgh Mathematical Society, 2013
AbstractWe establish a defect relation for algebraically non-degenerate meromorphic maps over generalized p-parabolic manifolds that intersect hypersurfaces in smooth projective algebraic varieties, extending certain results of H. Cartan, L. Ahlfors, W. Stoll, M. Ru, P. M. Wong and Philip P. W. Wong and others.
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Remarks on Nonassociative Structures in Quantum Projective Field Theory: the Central Extension jl(2,C) of the Double sl(2,C)+sl(2,C) of the Simple Lie Algebra sl(2,C) and Related Topics

Acta Applicandae Mathematica, 1998
This paper is a revised and expanded version of two notes devoted to nonassociative structures in quantum projective field theory.
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Variational algorithms for linear algebra

Science Bulletin, 2021
Xiaosi Xu, Jinzhao Sun, Suguru Endo
exaly  

Using Project-Based Learning in the Course "Databases" on the Topic "Relational Algebra"

2022 45th Jubilee International Convention on Information, Communication and Electronic Technology (MIPRO), 2022
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