External Signs Of Ageing
External may refer to: * External (mathematics), a concept in abstract algebra * Externality, in economics, the cost or benefit that affects a party who did not choose to incur that cost or benefit * Externals, a fictional group of X-Men antagonists See also * *Internal (other) Internal may refer to: *Internality as a concept in behavioural economics *Neijia, internal styles of Chinese martial arts *Neigong or "internal skills", a type of exercise in meditation associated with Daoism *''Internal (album)'' by Safia, 2016 ...

External Links
An internal link is a type of hyperlink on a web page to another page or resource, such as an image or document, on the same website or domain. Hyperlinks are considered either "external" or "internal" depending on their target or destination. Generally, a link to a page outside the same domain or website is considered external, whereas one that points at another section of the same web page or to another page of the same website or domain is considered internal. These definitions become clouded, however, when the same organization operates multiple domains functioning as a single web experience, e.g. when a secure commerce website is used for purchasing things displayed on a non-secure website. In these cases, links that are "external" by the above definition can conceivably be classified as "internal" for some purposes. Ultimately, an internal link points to a web page or resource in the same root directory. Similarly, seemingly "internal" links are in fact "external" for ...
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External (mathematics)
The term external is useful for describing certain algebraic structures. The term comes from the concept of an external binary operation which is a binary operation that draws from some ''external set''. To be more specific, a left external binary operation on ''S'' over ''R'' is a function f : R \times S \rightarrow S and a right external binary operation on ''S'' over ''R'' is a function f : S \times R \rightarrow S where ''S'' is the set the operation is defined on, and ''R'' is the external set (the set the operation is defined ''over''). Generalizations The ''external'' concept is a generalization rather than a specialization, and as such, it is different from many terms in mathematics. A similar but opposite concept is that of an ''internal binary function'' from ''R'' to ''S'', defined as a function f : R \times R \rightarrow S. Internal binary functions are like binary functions, but are a form of specialization, so they only accept a subset of the domains of binary funct ...
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Externality
In economics, an externality or external cost is an indirect cost or benefit to an uninvolved third party that arises as an effect of another party's (or parties') activity. Externalities can be considered as unpriced goods involved in either consumer or producer market transactions. Air pollution from motor vehicles is one example. The cost of air pollution to society is not paid by either the producers or users of motorized transport to the rest of society. Water pollution from mills and factories is another example. All consumers are all made worse off by pollution but are not compensated by the market for this damage. A positive externality is when an individual's consumption in a market increases the well-being of others, but the individual does not charge the third party for the benefit. The third party is essentially getting a free product. An example of this might be the apartment above a bakery receiving the benefit of enjoyment from smelling fresh pastries every mornin ...
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Externals
The Externals are a group of fictional characters appearing in American comic books published by Marvel Comics. Considered a rare subspecies of mutants, most of them were X-Men antagonists. The original, unused name for the group was to be The Prophets, as seen on the back of the Sunspot & Gideon trading card included with X-Force #1. The characters first appeared in ''X-Force'' #10 (May 1992). Background The Externals are all mutants with the additional gift of immortality and, as expressed by Cable, they play an important role in the future and Apocalypse's rise to power. Their true origins are scattered throughout history, but its known that they all share a psychic-link with each other that separates them from other immortals as it allows them to not only sense each other and where, but allows them to summon each other at will from great distances and also allows them to sense when one rises from the dead and when one is killed. Saul, Absalom, Gideon, Nicodemus, Burke, Sel ...
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