Expression (mathematics) (1242 bytes)
1: ...and system of values that forms the context of an expression.
3: ... "[[free variable]]s" that are not defined in the expression, but taken from the context.
5: Two expressions are said to be [[equivalent]] if they can be eva...
7: ...en a major influence in the development of modern mathematics and computer [[programming language]]s.
9: ...e cases [[undecidable]]. This is also true of any expression in any system that has power equivalent to the la...

Expression (528 bytes)
1: '''Expression''' may refer to:
3: ...omething (including an emotion through a [[facial expression]] or configuration)
4: ...s]]) a '''[[expression (mathematics)|mathematical expression]]'''
5: ...rogramming language '''[[expression (programming)|expression]]'''
6: ...ting]]) a vector graphics software '''[[Microsoft Expression]]'''

M-expression (1003 bytes)
1: '''M-Expressions''' are so-called ''meta-expressions'' which were intended to be used in [[Lisp progr...
3: ... represent data structures or parsed mathematical expressions look like this:
12: ...ese M-expressions were then to be translated to S-expressions to be executed, hence the ''meta'' designation.
14: ... examples of an M-expression and the equivalent S-expression follow.
19: ...ns directly for both data and program code, and M-expressions fell into disuse.

S-expression (1986 bytes)
2: ...sion in a [[computer program]] in a text form. S-expressions are used in the [[Lisp programming language]] an...
4: ...ion]]s, but Lisp programmers soon started using S-expressions as the default notation.
7: S-expressions can either be single objects such as numbers, [[...
10: ...ar]] for writing Lisp programs is that the common expression <code>(quote x)</code> can be written with the ab...

Expression (programming) (451 bytes)
1: An '''expression''' in a [[programming language]] is a combination...
3: Expressions may or may not have side-effects.

Blank expression (373 bytes)
1: ...ng a good or bad hand, hence the need for a blank expression.
2: [[Category:Facial expressions]]

Expression vector (1049 bytes)
1: ...he gene that is carried on the expression vector. Expression vectors are basic tools for [[biotechnology]] and...
4: [[Category:Gene expression]]

Facial expression (2675 bytes)
1: ...]]s. [[Charles Darwin]] noted in his book ''[[The Expression of the Emotions in Man and Animal]]'':
5: .... Research has also shown that consciously making expressions can induce the corresponding emotion.
7: ...not learn to read them at all. Recognizing facial expressions uses some of the same brain systems as [[face re...
9: Facial expressions include:
12: * [[blank expression|blank]]

Mathematical expression (488 bytes)
1: A '''mathematical expression''' is a string of symbols which describes (or ''e...
4: ...cribes a computation in which we add 3 and the subexpression <font size=+1 color=red>5*6/10</font>.

Gene expression (2501 bytes)
1: ...(also '''protein expression''' or often simply '''expression''') is the process by which a gene's information ...
3: Gene expression is a multi-step process that begins with [[transc...
7: ...se in mRNA concentration need not always increase expression.)
9: ==Control of expression==
10: Control of gene expression depends various factors including:

Colloquial expression (204 bytes)
1: A '''colloquial expression''' is a phrase that appears more often in spoken ...

Regular expression (18263 bytes)
1: ...re the first to popularize the concept of regular expressions.
5: ...lar expression, often called a ''pattern'', is an expression that describes a set of strings without actually ...
20: ...structions can be freely combined within the same expression, so that "H(ae?|ä)ndel" is the same as "H(a|ae|ä)...
22: The precise [[syntax]] for regular expressions varies among tools and application areas, and is...
26: ...ally into [[grep]]. Ever since that time, regular expressions have been widely used in Unix and Unix-like util...

Gene expression programming (1765 bytes)
1: ...he linear chromosomes) and the [[phenotype]] (the expression trees) are different entities (both structurally ...
3: ...new chromosomes are expressed forming the body or expression trees (ETs).
9: ...s new algorithm, see the seminal [http://www.gene-expression-programming.com/webpapers/gep.pdf GEP paper] (pub...

Creature House Expression (449 bytes)
1: '''Creature House Expression''' is a [[vector graphics]] software that was dev...
3: ...cts/expression/default.asp?pg=home Creature House Expression 3 Website].
7: [[ja:Expression]]

Idea-expression divide (2032 bytes)
2: ...deas, information or function, but only the fixed expression of ideas. Only the way in which something has bee...
4: ...ed, but what is written in the book, the original expression of the idea, may not be copied. One might be able...
8: ...known as the ''[[merger doctrine]]'', because the expression is considered to be inextricably merged with the ...

Parsing expression grammar (11822 bytes)
1: ...ing expression grammars look similar to [[regular expression]]s or [[context-free grammar]]s in [[Backus-Naur ...
7: Formally, a parsing expression grammar consists of:
13: ...(mathematics)|expression]] similar to a [[regular expression]], which is constructed in the following fashion:
15: # An ''atomic parsing expression'' consists of:
19: ...sub>1</sub>, and ''e''₂, a new parsing expression can be constructed using the following operators:

International Freedom of Expression Exchange (1757 bytes)
1: ...f of its members by Canadian Journalists for Free Expression, IFEX acts as a clearing house for exchanging inf...
4: ... alerts whenever an IFEX member reports on a free expression violation anywhere in the world. This enables mem...
7: ...ntains the largest archive of information on free expression violations on the Internet, dating back to 1995.
10: .../265 www.ifex.org]) which reports on the top free expression developments around the world and on the activiti...

Expression-oriented programming languages (436 bytes)
1: An '''expression-oriented''' [[programming language]] is one where...
3: [[ALGOL 68]] is an example of an expression-oriented language. [[Pascal (programming language...

E6 (mathematics) (2611 bytes)
3: In [[mathematics]], '''E₆''' is the name of a [[Lie gro...

Where Mathematics Comes From (16899 bytes)
1: ...science of mathematics]], or a theory of embodied mathematics. It is notable mostly for the dialogue it has spa...
3: ...nitive terms. This idea analysis is distinct from mathematics itself and cannot be performed by mathematicians ...
5: ... brains, and the question whether a "transcendent mathematics" objectively exists is thus unanswerable and clos...
9: ...f investigation, mathematics must equally be one. Mathematics is in some sense "useful", and insofar as it is e...
11: ...ew of subject/object relations that had dominated mathematics since [[Descartes]], with a growing consensus tha...

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