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A complex is a whole that comprehends a number of parts, especially one with interconnected or mutually related parts. It may refer to: Wikipedia does not have an article with this exact name. ... Wiktionary is a Wikimedia Foundation project intended to be a free wiki dictionary (hence: Wiktionary) (including thesaurus and lexicon) in every language. ...

• In chemistry, a complex, also called a coordination compound or metal complex, is a structure consisting of a central atom or molecule weakly connected to surrounding atoms or molecules.

• In psychology, a complex is a group of mental factors that are unconsciously associated by the individual with a particular subject and influence the individual's attitude and behavior.

• In geology, a complex is an assemblage of different rocks of any age origin that have been folded, intricately mixed, involved, or otherwise complicated, such that the rocks cannot be readily differentiated in mapping.

Synthesis of copper(II)-tetraphenylporphine, a metal complex, from tetraphenylporphine and copper(II) acetate monohydrate. ... In psychology a complex is generally an important group of unconscious associations, or a strong unconscious impulse lying behind an individuals otherwise mysterious condition: the detail varies widely from theory to theory. ...

In mathematics:

• A complex number is a number of the form a + ib, where a and b are real numbers and i is the imaginary number.

• A complex system is a system comprised of interconnected distinguished parts that exhibit a high degree of computational complexity from which emerges a higher order behavior.

• A complex is an element of a complex algebra or field of sets.

• A simplicial complex is a kind of topological space that can be divided into fully adjacent triangles, or more generally, into simplices.

• A CW complex, or closure-finite weak complex, is a kind of topological space, a generalization of the simplicial complex.

In mathematics, a complex number is a number of the form where a and b are real numbers, and i is the imaginary unit, with the property i 2 = −1. ... In mathematics, the set of real numbers, denoted R, is the set of all rational numbers and irrational numbers. ... There are many definitions of complexity, therefore many natural, artificial and abstract objects or networks can be considered to be complex systems, and their study (complexity science) is highly interdisciplinary. ... Complexity theory can refer to more than one thing: Computational complexity theory: a field in theoretical computer science and mathematics dealing with the resources required during computation to solve a given problem Systems theory (or systemics or general systems theory): an interdisciplinary field including engineering, biology and philosophy that incorporates... In mathematics a field of sets is a pair where is a set and is an algebra over i. ... In mathematics, a simplicial complex is a topological space of a particular kind, built up of points, line segments, triangles, and their n-dimensional counterparts. ... In geometry, a simplex (plural: simplices) or n-simplex is an n-dimensional analogue of a triangle. ... In topology, a CW complex is a type of topological space introduced by J.H.C. Whitehead to meet the needs of homotopy theory. ...

See also

• socio-cognitive
• systemics

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