H-transformation of t-norms

  • Authors:
  • Andrea Mesiarová

  • Affiliations:
  • Mathematical Institute of SAS, Štefánikova 49, 81473 Bratislava, Slovakia

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2006

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Abstract

Cancellative t-norms are generated only if they do not posses anomalous pairs and then they are isomorphic to subsemigroups of ([0,~],+). A new construction method for t-norms, so-called H-transformation of t-norms, is introduced and studied, generalizing a recent example of Hajek. H-transformation allows to construct non-generated cancellative (left-continuous) t-norms with prescribed number of non-trivial Archimedean components. The unique t-norm stable under H-transformation is also described. In an analogous way, H-transformation of residual implications is given. Finally, a general H-transformation based on cancellative discrete t-conorms is proposed and examined.