Philosophy Lexicon of Arguments

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Equal sign: a symbol, which states that the terms on the left and right hand side refer to the same object. The equal sign is defined for numbers. It has to be redefined when objects from other domains are to be linked. See also identity, equality.

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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.

 
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Books on Amazon
II 63
Equal sign / Meaning / Cresswell: the meaning of the equal sign we can interpret as a) set of triples and (if n not equal to m) - b) set of pairs for each number n - general: for any set A, there is a characteristic function CA so that CA (x) = T if x e A and CA (x) = F if x e A. -
II 64
These two variants are not entirely equivalent, because there could be a partial function, i.e. one that is not defined for some numbers.


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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.

Cr I
M. J. Cresswell
Semantical Essays (Possible worlds and their rivals) Dordrecht Boston 1988

Cr II
M. J. Cresswell
Structured Meanings Cambridge Mass. 1984


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Ed. Martin Schulz, access date 2017-10-23