Additive may refer to:
Mathematics
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Additive function
In number theory, an additive function is an arithmetic function ''f''(''n'') of the positive integer variable ''n'' such that whenever ''a'' and ''b'' are coprime, the function applied to the product ''ab'' is the sum of the values of the func ...
, a function in number theory
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Additive map
In algebra, an additive map, Z-linear map or additive function is a function f that preserves the addition operation:
f(x + y) = f(x) + f(y)
for every pair of elements x and y in the domain of f. For example, any linear map is additive. When the ...
, a function that preserves the addition operation
* Additive set-functionn see
Sigma additivity
In mathematics, an additive set function is a function mapping sets to numbers, with the property that its value on a union of two disjoint sets equals the sum of its values on these sets, namely, \mu(A \cup B) = \mu(A) + \mu(B). If this additivit ...
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Additive category, a preadditive category with finite biproducts
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Additive inverse, an arithmetic concept
Science
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Additive color
Additive color or additive mixing is a property of a color model that predicts the appearance of colors made by coincident component lights, i.e. the perceived color can be predicted by summing the numeric representations of the component colo ...
, as opposed to subtractive color
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Additive model, a statistical regression model
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Additive synthesis, an audio synthesis technique
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Additive genetic effects
Additive genetic effects occur when two or more genes source a single contribution to the final phenotype, or when alleles of a single gene (in heterozygotes) combine so that their combined effects equal the sum of their individual effects. Non-ad ...
* Additive quantity, a physical quantity that is additive for subsystems; see
Intensive and extensive properties
Engineering
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Feed additive A feed additive is an additive of extra nutrient or drug for livestock. Such additives include vitamins, amino acids, fatty acids, minerals, pharmaceutical, fungal products and steroidal compounds. The additives might impact feed presentation, hygi ...
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Gasoline additive, a substance used to improve the performance of a fuel, lower emissions or clean the engine
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Oil additive, a substance used to improve the performance of a lubricant
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Weakly additive In fair division, a topic in economics, a preference relation is weakly additive
if the following condition is met:
: If A is preferred to B, and C is preferred to D (and the contents of A and C do not overlap) then A together with C is preferabl ...
, the quality of preferences in some logistics problems
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Polymer additive
Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics to be moulded, extruded or pressed into solid objects of various shapes. This adaptab ...
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Pit additive
Pit additives is a commercially-produced material that aims to reduce fecal sludge build-up and control odor in pit latrines, septic tanks and wastewater treatment plants. Manufacturers claim to use effective microorganisms (EM) in their produc ...
, a material aiming to reduce fecal sludge build-up and control odor in pit latrines, septic tanks and wastewater treatment plants
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Biodegradable additives
Biodegradable additives are additives that enhance the biodegradation of polymers by allowing microorganisms to utilize the carbon within the polymer chain as a source of energy. Biodegradable additives attract microorganisms to the polymer throug ...
Other uses
* , one of the grammatical cases in Estonian
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Food additive, any substance added to food to improve flavor, appearance, shelf life, etc.
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Additive rhythm
In music, the terms ''additive'' and ''divisive'' are used to distinguish two types of both rhythm and meter:
* A divisive (or, alternately, multiplicative) rhythm is a rhythm in which a larger period of time is divided into smaller rhythmic uni ...
, a larger period of time constructed from smaller ones
See also
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Additivity (disambiguation)
{{disambiguation
