Skip to search formSkip to main content
You are currently offline. Some features of the site may not work correctly.

Projection (relational algebra)

Known as: Projection, Projection (database), Projection in relational algebra 
In relational algebra, a projection is a unary operation written as where is a set of attribute names. The result of such projection is defined as… Expand
Wikipedia

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
2008
2008
In this paper we propose a Lagrangian coherent structures (LCS) based approach to modeling and estimation of contaminant… Expand
  • figure 1
  • figure 2
  • figure 3
  • figure 4
  • figure 6
Is this relevant?
2006
2006
  • Robert Orsi
  • SIAM J. Matrix Anal. Appl.
  • 2006
  • Corpus ID: 11033543
Presented here are two related numerical methods, one for the inverse eigenvalue problem for nonnegative or stochastic matrices… Expand
  • table 6.1
  • figure 6.1
  • table 6.3
Is this relevant?
Highly Cited
2005
Highly Cited
2005
Design procedures are proposed for two different classes of observers for systems withunknown inputs. In thefirst approach, the… Expand
  • figure 1
  • figure 2
Is this relevant?
2005
2005
0.1. Interpolation. Let (Ω, μ) be a measure space. Consider an operator Q that acts in all spaces L(μ) with 1 < p < ∞ and is a… Expand
  • figure 1
  • figure 2
Is this relevant?
2005
2005
Classical results of Kalton are used to study the complementation of the space W(X, Y) of weakly compact operators and the space… Expand
Is this relevant?
2000
2000
A set A C R 2 is called invisible, if its orthogonal projection is of measure 0 in almost every direction; A is visible, if it is… Expand
  • figure 1
  • figure 2
  • figure 3
  • figure 4
Is this relevant?
2000
2000
Sobczyk's theorem is usually stated as: every copy of c0 inside a separable Banach space is complemented by a projection with… Expand
Is this relevant?
Highly Cited
1998
Highly Cited
1998
A self-constructing neural fuzzy inference network (SONFIN) with online learning ability is proposed in this paper. The SONFIN is… Expand
Is this relevant?
Highly Cited
1990
Highly Cited
1990
  • H. Hong
  • ISSAC '90
  • 1990
  • Corpus ID: 2395518
The Cylindrical Algebraic Decomposition (CAD) method of Collins [5] decomposes <italic>r</italic>-dimensional Euclidean space… Expand
  • table 1
  • table 3
  • table 2
Is this relevant?
Highly Cited
1988
Highly Cited
1988
A key component of the cylindrical algebraic decomposition (cad) algorithm of Collins (1975) is the projection operation: the… Expand
  • figure 1
  • figure 2
  • table 2
  • table 3
Is this relevant?