## Psychology Dictionary of ArgumentsHome | |||

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Functors: A functor in logic is a function that maps from one logical structure to another. It preserves the structure of the original logical structure, but it may change the specific values of the logical elements. For example, a functor could be used to map from a propositional calculus formula to a first-order logic formula. This functor would preserve the logical structure of the formula, but it would replace the propositional variables with predicate variables. See also Variables, Propositional calculus, Predicate calculus, Logic, Logical formuulas._____________ Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. | |||

Author | Concept | Summary/Quotes | Sources |
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Arthur N. Prior on Functors - Dictionary of Arguments ad I 53 Functor/Prior: a functor only provides requirements for the category to which it can be applied. - It does not produce a true statement. - It does not lead to existence. >Existence, >Existence statements, >Assertions. _____________ Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution. Translations: Dictionary of Arguments The note [Concept/Author], [Author1]Vs[Author2] or [Author]Vs[term] resp. "problem:"/"solution:", "old:"/"new:" and "thesis:" is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition. |
Pri I A. Prior Objects of thought Oxford 1971 Pri II Arthur N. Prior Papers on Time and Tense 2nd Edition Oxford 2003 |