Philosophy Dictionary of Arguments

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Abstraction: Subsumption of objects by non-consideration of certain properties. See also equivalence relation, concretion, concreta, indiscernibility.

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 Item Summary Meta data
Stuhlmann-Laeisz II 49
Definition abstraction/Frege/St: abstraction is a process to identify each other in the various elements of a region - e.g. same color, same size, same shape - new objects are gained by abstraction of the partial identity - ((s) such objects which are only about numerical equality or color identity are individuated) - if A is such an abstraction, then there is by definition a (base) object a, so that the following is true: A is the F of a.
Thiel I 131
Abstraction/Mathematics/Frege/Thiel: Abstraction is a purely logical process, an operation with statements, the logical character of which is revealed by the change from the structure of the complicated initial statement to the structure of the new statement.
Frege understood this first. Statements not only about numbers, but also about sets, functions, concepts, situations, meaning and truth value of a statement, about structures.
I 133
Numbers/digits/number names/names/mathematics/Thiel: the philosophical punch line of the transition from general statements via digits to arithmetic statements is that although we have introduced the speech about numbers in addition to the speech about digits, it is still a form of speech, a facon de parler, whose possibility does not depend on the fact that there are still abstract objects beyond the concrete digits, which we call "numbers".
I 134
We also had no reason to conceive the digits as "names" of numbers, so that 4, IV, and |||| would denote the same number four, as it was assumed in the traditional philosophy of numbers.

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.
The note [Author1]Vs[Author2] or [Author]Vs[term] is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition.

G. Frege
Die Grundlagen der Arithmetik Stuttgart 1987

G. Frege
Funktion, Begriff, Bedeutung Göttingen 1994

G. Frege
Logische Untersuchungen Göttingen 1993

R. Stuhlmann Laeisz
Philosophische Logik Paderborn 2002

Stuhlmann II
R. Stuhlmann-Laeisz
Freges Logische Untersuchungen Darmstadt 1995

Chr. Thiel
Philosophie und Mathematik Darmstadt 1995

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Ed. Martin Schulz, access date 2019-06-25
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