Economics Dictionary of Arguments

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Equations: An equation in mathematics or physics is a statement that two expressions are equal. It is written using the equals sign (=). For example, 2+3=5 is an equation in mathematics, and F=ma is an equation in physics. Equations also describe the laws of nature. The reason is that causes and effects do not occur in equations. See also Causes, Effects, Natural laws.
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

Gottlob Frege on Equations - Dictionary of Arguments

II 29
Equation/language/assertion/Frege: the linguistic form of the equations is a declarative sentence. It contains the sense of a thought, e.g. 4 is the meaning of the expression 2 + 2, London is the meaning of the expression England’s capital.
, >Sentence, >Function, >Predication.
II 68
Equation/Frege: an equation is reversible ("is" is taken here as a mathematical equal sign). On the other hand: predication is irreversible, e.g. the Venus is nothing but the morning star. Falling under a concept: is not reversible -(> copula), >Symmetry, >Identity, >Equal sign.

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.

G. Frege
Die Grundlagen der Arithmetik Stuttgart 1987

G. Frege
Funktion, Begriff, Bedeutung Göttingen 1994

G. Frege
Logische Untersuchungen Göttingen 1993

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