منابع مشابه
Closure Operators and Polarities
Basic results are obtained concerning Galois connections between collections of closure operators (of various types) and collections consisting of subclasses of (pairs of) morphisms in M for an 〈E,M 〉 -category X . In effect, the “lattice” of closure operators on M is shown to be equivalent to the fixed point lattice of the polarity induced by the orthogonality relation between composable pairs...
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Interaction Grammars are a grammatical formalism based on the notion of polarities. Polarities express the resource sensitivity of natural languages by modelling the distinction between saturated and unsaturated syntactic structures. A sentence’s syntactic composition is represented as an “electrostatic” process guided by the neutralization of polarities. At the heart of the formalism, there is...
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1. In t roduc t ion . A unitary polarity of a finite projective plane 8P of order q is a polarity 0 having q + 1 absolute points and such that each nonabsolute line contains precisely q + 1 absolute points. Let G{6) be the group of collineations of SP centralizing 6. In [15] and [16], A. Hoffer considered restrictions on G (6) which force SP to be desarguesian. The present paper is a continuati...
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ژورنال
عنوان ژورنال: Journal of Logic and Computation
سال: 2020
ISSN: 0955-792X,1465-363X
DOI: 10.1093/logcom/exaa024