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• 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 atomFor alternative meanings see atom (disambiguation). An atom is a microscopic structure found in all ordinary matter around us. Atoms are composed of 3 types of subatomic particles: electrons, which have a negative charge; protons, which have a positive ch (independent or within a moleculeIn science, a molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. A molecule consists of multiple atoms joined by shared pairs of electrons in a covalent bond''. It may consist of atom) is reduced by the addition of electronThe electron (also called negatron commonly represented as e&minus is a subatomic particle. In an atom the electrons surround the nucleus of protons and neutrons in an electron configuration. Electrons have the smallest electrical charge and when they movs. A reduced gasA reduced gas is a gas with a low oxidation number (or high reduction), and is usually hydrogen-rich. Strongly reduced gases include methane, ammonia, and hydrogen sulfide. Such gases are strongly associated with the origin of life. is thus hydrogenhydrogen helium H Li Full table General Name, Symbol, NumberHydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1 , s Density, Hardness 0. 0899 kg/m3, NA Appearance colorless Atomic properties Atomic weight 1. 00794 amu Atomic radius (ca-rich.

• In philosophyPhilosophy literally means 'love of wisdom' from the Greek 'philo' and 'sofia'. It is now widely used to designate the pursuit of knowledge or wisdom about fundamental matters concerning life, death, meaning, reality, being and truth. The term may also re, reductionReduction is the process by which one object, property, concept, theory, etc. is shown to be entirely dispensable in favor of another. For example, we say that chemical properties such as the boiling point of a substance are reducible to that substance’s is the process of explaining one phenomenonA phenomenon (plural: phenomena is an observable event, especially something special. Kant's use of phenomenon Phenomenon has a specialized meaning in the philosophy of Immanuel Kant who contrasted the term 'Phenomenon' with Noumenon'. Phenomena constitut 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.