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- Glad Deschrijver, Chris Cornelis, Etienne E. Kerre
- IEEE Trans. Fuzzy Systems
- 2004

Intuitionistic fuzzy sets form an extension of fuzzy sets: while fuzzy sets give a degree to which an element belongs to a set, intuitionistic fuzzy sets give both a membership degree and a nonmembership degree. The only constraint on those two degrees is that their sum must be smaller than or equal to 1. In fuzzy set theory, an important class of… (More)

- Chris Cornelis, Glad Deschrijver, Etienne E. Kerre
- Int. J. Approx. Reasoning
- 2004

With the demand for knowledge-handling systems capable of dealing with and distinguishing between various facets of imprecision ever increasing, a clear and formal characterization of the mathematical models implementing such services is quintessential. In this paper, this task is undertaken simultaneously for the definition of implication within two… (More)

- Annelies Vroman, Glad Deschrijver, Etienne E. Kerre
- IEEE Trans. Fuzzy Systems
- 2007

- Glad Deschrijver, Etienne E. Kerre
- Fuzzy Sets and Systems
- 2003

- Glad Deschrijver
- Inf. Sci.
- 2007

- Glad Deschrijver
- Fuzzy Sets and Systems
- 2008

- Glad Deschrijver, Etienne E. Kerre
- Inf. Sci.
- 2007

- Glad Deschrijver, Etienne E. Kerre
- Fuzzy Sets and Systems
- 2005

In this paper we introduce aggregation operators on the lattice L∗, which is the underlying lattice of both intervalvalued fuzzy sets and intuitionistic fuzzy sets in the sense of Atanassov. We consider some particular classes of binary aggregation operators based on t-norms on the unit interval. We investigate the properties of the implicators generated by… (More)

- Glad Deschrijver, Chris Cornelis
- International Journal of Uncertainty, Fuzziness…
- 2007

Interval-valued fuzzy set theory is an increasingly popular extension of fuzzy set theory where traditional [0, 1]-valued membership degrees are replaced by intervals in [0, 1] that approximate the (unknown) membership degrees. To construct suitable graded logical connectives in this extended setting, it is both natural and appropriate to “reuse”… (More)

- Bart Van Gasse, Glad Deschrijver, Chris Cornelis, Etienne E. Kerre
- Inf. Sci.
- 2010

An important concept in the theory of residuated lattices and other algebraic structures used for formal fuzzy logic, is that of a filter. Filters can be used, amongst others, to define congruence relations. Specific kinds of filters include Boolean filters and prime filters. In this paper, we define several different filters of residuated lattices and… (More)