Leibniz -- De Arte Combinatoria

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DAC.  Note 1

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| From 'Of the Art of Combination' (1666)
|
| Definitions
|
| 1.  "Variation" here is a change of relation.
|     For some change is of substance, some of
|     quantity, some of quality;  some makes
|     no change in a thing, but changes only
|     its relation, its situation, or its
|     conjunction with something else.
|
| 2.  "Variability" is the quantity of all variations.
|     For the limits of powers, taken in the abstract,
|     denote their quantity;  so it is often said in
|     mechanics that the power of one machine is
|     double that of another.
|
| Leibniz, DAC, p. 1.
|
| Leibniz, 'Logical Papers', A Selection Translated and
| Edited with an Introduction by G.H.R. Parkinson (ed.),
| Oxford University Press, London, UK, 1966.

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