Reduction

Reduction or reducing has several meanings:

In mathematics, reduction is the process of manipulating a series of equations or matrices into a desired 'simpler' format.
In computational complexity theory, reduction is the transformation of an instance of one problem into an equivalent instance of another.
In cooking, reduction is the process of thickening a liquid mixture such as a sauce by evaporation.
In chemistry, reduction is the reverse of oxidation, i.e. the formal oxidation state of an atom (independent or within a molecule) is reduced by the addition of electrons. A reduced gas is thus hydrogen-rich.
In philosophy, reduction is the process of explaining one phenomenon in terms of another.
In linguistics, reduction is to shorten the pronunciation of a word. e.g. wanna, lemme, gimme.
In physiology, reduction or reducing is another name for weight loss or dieting.

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