“Since of quantity, one kind is viewed by itself, having no relation to anything else”

—  Nicomachus

Nicomachus of Gerasa: Introduction to Arithmetic (1926)
Context: Since of quantity, one kind is viewed by itself, having no relation to anything else, as 'even,' 'odd,' 'perfect,' and the like, and the other is relative to something else, and is conceived of together with its relationship to another thing, like' double,', greater,' 'smaller,' 'half,' 'one and one-half times,' 'one and one-third times,' and so forth, it is clear that two scientific methods will lay hold of and deal with the whole investigation of quantity: arithmetic, [with] absolute quantity; and music, [with] relative quantity.<!--Book I, Chapter III, p.184

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Nicomachus 22
Ancient Greek mathematician 60–120

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