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Restricted Priestley Dualities and Discriminator Varieties [PDF]

open access: greenStudia Logica, 2017
Anyone who has ever worked with a variety~$\boldsymbol{\mathscr{A}}$ of algebras with a reduct in the variety of bounded distributive lattices will know a restricted Priestley duality when they meet one---but until now there has been no abstract definition. Here we provide one.
Brian Davey, Asha Gair
exaly   +7 more sources

The Subquasivariety Lattice of a Discriminator Variety

open access: closedAdvances in Mathematics, 2001
The quaterny discriminator on a set \(M\) is the mapping \(d:M^4\to M\) defined by \(d(x,y,z,w):=z\) if \(x=y\) and \(d(x,y,z,w):=w\) otherwise. A variety is called a discriminator variety if it is generated by a class \({\mathbf K}\) of algebras of the same type such that there exists a term representing the quaternary discriminator on every algebra ...
Javier Blanco   +2 more
exaly   +4 more sources

Decidable Discriminator Varieties from Unary Classes [PDF]

open access: bronzeTransactions of the American Mathematical Society, 1993
Let K \mathcal {K} be a class of (universal) algebras of fixed type. K t {\mathcal {K}^t} denotes the class obtained by augmenting each member of K \mathcal {K} by the ternary discriminator function (
Ross Willard
openalex   +2 more sources

Characterization of discriminator varieties [PDF]

open access: bronzeProceedings of the American Mathematical Society, 2000
The discriminator function on a set \(A\) is the function \(t:A^3\to A\) defined by \(t(a,b,c)=a\) if \(a\neq b\), and \(t(a,b,c)=c\) if \(a=b\). A ternary term \(t(x,y,z)\) is called a discriminator term for algebra \({\mathcal A}\) if it represents the discriminator function on \(A\).
Diego Vaggione
openalex   +3 more sources

Dual binary discriminator varieties

open access: diamondThe Art of Discrete and Applied Mathematics, 2019
Summary: Left normal bands, strongly distributive skew lattices, implicative BCS-algebras, skew Boolean algebras, skew Boolean intersection algebras, and certain other non-commutative structures occur naturally as term reducts in the study of ternary discriminator algebras and the varieties that they generate, giving rise thereby to various classes of ...
Robert J Bignall, Matthew Spinks
openalex   +5 more sources

Decompositions of dual discriminator varieties [PDF]

open access: diamondBulletin of the Australian Mathematical Society, 1991
A necessary and sufficient condition for a dual discriminator variety to be the product of a discriminator variety and a dual discriminator variety is given, along with an example of such a variety.
Robert J Bignall
openalex   +3 more sources

Equationally Complete Discriminator Varieties of Groupoids [PDF]

open access: bronzeProceedings of the American Mathematical Society, 1984
J. Kalicki proved that there are continuum many equationally complete varieties of groupoids. In this note we give a constructive proof of this by defining a countable partial groupoid which has continuum many completions such that each completion generates an equationally complete variety, and no two distinct completions generate the same variety ...
Robert W. Quackenbush
openalex   +3 more sources

Bounded lattice structured discriminator varieties

open access: bronzePortugaliae Mathematica, 2010
This paper is concerned with bounded lattice structured discriminator varieties, i.e., discriminator varieties interpreting the variety L01 of bounded lattices.
Margarita Ramalho
openalex   +3 more sources

Hybrid GAN-LSTM framework for diabetic foot ulcer image synthesis and automated diagnosis [PDF]

open access: yesFrontiers in Medicine
IntroductionThe application of artificial intelligence (AI) in the analysis of medical images faces significant challenges, chiefly due to the scarcity of well-labeled datasets that are crucial for training sophisticated diagnostic models.
Abinaya Vina   +7 more
doaj   +2 more sources

Deep atrous context convolution generative adversarial network with corner key point extracted feature for nuts classification [PDF]

open access: yesScientific Reports
Deep learning-based nut classification has emerged as a viable way to automate the detection and categorization of different nut varieties in the food processing and agriculture sectors.
M. Shyamala Devi   +3 more
doaj   +2 more sources

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