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On the T -conditionality of T -power based implications

Zuming Peng (2022)

Kybernetika

It is well known that, in forward inference in fuzzy logic, the generalized modus ponens is guaranteed by a functional inequality called the law of T -conditionality. In this paper, the T -conditionality for T -power based implications is deeply studied and the concise necessary and sufficient conditions for a power based implication I T being T -conditional are obtained. Moreover, the sufficient conditions under which a power based implication I T is T * -conditional are discussed, this discussions give an...

On the topological complexity of infinitary rational relations

Olivier Finkel (2003)

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications

We prove in this paper that there exists some infinitary rational relations which are analytic but non Borel sets, giving an answer to a question of Simonnet [20].

On the transfer principle in fuzzy theory.

Michiro Kondo, Wieslaw A. Dudek (2005)

Mathware and Soft Computing

We show in this paper that almost all results proved in many papers about fuzzy algebras can be proved uniformly and immediately by using so-called Transfer Principle.

On the weak pigeonhole principle

Jan Krajíček (2001)

Fundamenta Mathematicae

We investigate the proof complexity, in (extensions of) resolution and in bounded arithmetic, of the weak pigeonhole principle and of the Ramsey theorem. In particular, we link the proof complexities of these two principles. Further we give lower bounds to the width of resolution proofs and to the size of (extensions of) tree-like resolution proofs of the Ramsey theorem. We establish a connection between provability of WPHP in fragments of bounded arithmetic and cryptographic assumptions (the existence...

On Todorcevic orderings

Bohuslav Balcar, Tomáš Pazák, Egbert Thümmel (2015)

Fundamenta Mathematicae

The Todorcevic ordering 𝕋(X) consists of all finite families of convergent sequences in a given topological space X. Such an ordering was defined for the special case of the real line by S. Todorcevic (1991) as an example of a Borel ordering satisfying ccc that is not σ-finite cc and even need not have the Knaster property. We are interested in properties of 𝕋(X) where the space X is taken as a parameter. Conditions on X are given which ensure the countable chain condition and its stronger versions...

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