Complex

Complex may refer to:

Biology

• Multiprotein complex, a group of two or more associated polypeptide chains
• Species complex, a cluster of very similar species difficult to delimit
• Mimicry complex, a complex system of organisms and dependencies involved in a case of mimicry

Chemistry

• Coordination complex, also called a "coordination compound" or "metal complex", a structure consisting of a central atom or molecule weakly connected to surrounding atoms or molecules (ligands)
• Chelate complex, a coordination complex with more than one bond

Mathematics

• Complex number, an extension of real numbers obtained by adjoining imaginary numbers
• Complex system, a system of interconnected simple parts that together exhibit a high degree of computational complexity from which emerges a higher order behavior
• Complex analysis, the study of functions of complex numbers
• An element of a complex algebra or field of sets
• Chain complex, a (possibly long) sequence of maps
• Simplicial complex, a kind of topological space that can be divided into fully adjacent triangles, or more generally, into simplices
• CW complex, or closure-finite weak complex, a kind of topological space, a generalization of the simplicial complex
• Line complex, a 3-dimensional family of lines in space

Other scientific uses

• Complex (psychology), a group of mental factors that are unconsciously associated by the individual with a particular subject and influence the individual's attitude and behavior
• Synonym for a complex system which generally includes all interactions between elements
• Complex crater, a type of large impact crater morphology

As a name

• Complex (magazine), a young men's style/lifestyle magazine
• CoMPLEX (ucl) is an interdisciplinary centre at University College London, specialising in bioinformatics and complexity
• Complex (English band), a British psychedelic rock band
• Complex (band), a Japanese rock band
• "Complex" (song), a song by British musician Gary Numan

See also

• The Complex (disambiguation)
• Complexity
• Complexity (disambiguation)
• Complexity theory (disambiguation)
• Theory of complex systems
• The Military–industrial complex