Title
Associativity of triangular norms characterized by the geometry of their level sets
Abstract
Associativity of triangular norms is an algebraic property which, unlike for example their commutativity, is usually understood as hardly visually interpretable. This problem has been studied intensively in the last decade and, as a result, geometric symmetries of triangular norms with involutive level sets have been revealed. The presented paper intends to introduce a different approach which gives more general results. The inspiration is taken from web geometry, a branch of differential geometry, and its concept of Reidemeister closure condition which is known to provide a geometric characterization of associativity of loops. The paper shows that this concept can be adopted successfully for triangular norms so that it characterizes their associativity in a similar way. Moreover, the offered adaptation preserves the beneficial transparency and simplicity of the Reidemeister closure condition. This way, a visual characterization of the associativity, based on the geometry of the level sets, is provided for general, continuous, and continuous Archimedean triangular norms.
Year
DOI
Venue
2012
10.1016/j.fss.2012.01.008
Fuzzy Sets and Systems
Keywords
Field
DocType
geometric characterization,reidemeister closure condition,triangular norm,web geometry,level set,differential geometry,general result,continuous archimedean triangular norm,involutive level set,geometric symmetry,associativity
Discrete mathematics,Algebraic number,Associative property,Commutative property,Level set,Differential geometry,Geometry,Homogeneous space,Mathematics
Journal
Volume
ISSN
Citations 
202,
0165-0114
7
PageRank 
References 
Authors
0.72
17
2
Name
Order
Citations
PageRank
Milan Petrík1448.09
Peter Sarkoci211312.64