Complex commonly refers to:

• Complexity, the behaviour of a system whose components interact in multiple ways so possible interactions are difficult to describe
  • Complex system, a system composed of many components which may interact with each other
• Complex (psychology), a core pattern of emotions etc. in the personal unconscious organized around a common theme such as power or status

Look up complex or complexes in Wiktionary, the free dictionary.

Complex may also refer to:

• Complex (English band), formed in 1968, and their 1971 album Complex
• Complex (band), a Japanese rock band
• Complex (album), by Montaigne, 2019, and its title track
• Complex (EP), by Rifle Sport, 1985
• "Complex" (song), by Gary Numan, 1979
• "Complex", a song by Katie Gregson-MacLeod, 2022
• "Complex" a song by Be'O and Zico, 2022
• Complex Networks, publisher of the now-only-online magazine Complex

• Protein–ligand complex, a complex of a protein bound with a ligand
• Exosome complex, a multi-protein intracellular complex
• Protein complex, a group of two or more associated polypeptide chains
• Species complex, a cluster of very similar species difficult to delimit
• Pre-Bötzinger complex, a cluster of interneurons in the ventral respiratory group of the medulla of the brainstem

• Coordination complex, a central atom or ion and a surrounding array of bound molecules or ions
• Chelate complex, a coordination complex with more than one bond

• Complex number, an extension of real numbers obtained by adjoining imaginary numbers
• Complex polytope, a generalization of a polytope in a complex Hilbert space
• Complex analysis, the study of functions of complex numbers
• Complex, an element of a field of sets
• Chain complex, an algebraic structure
• Simplicial complex, a kind of topological space
  • CW complex, a kind of topological space
• Line complex, a 3-dimensional family of lines in space

• Complex (geology), a unit of rocks composed of rocks of two or three types
• Complex crater, a type of large impact crater morphology
• Volcanic complex, a group of volcanoes
• Complex volcano, a volcano of mixed form
• Accretionary complex, a fossil accretionary wedge

• Building complex, a group of inter-related buildings
  • Housing complex, specifically residential
  • Market complex, group of stores or business firms in a marketplace having common walkway(s), usually enclosed within a boundary or situated under one roof
• UCL Centre for Mathematics and Physics in the Life Sciences and Experimental Biology (CoMPLEX), part of UCL Faculty of Mathematical and Physical Sciences, London, UK

• All pages with titles beginning with Complex
• All pages with titles containing Complex
• Complexity (disambiguation)
• Complexity theory (disambiguation)
• Military–industrial complex

This disambiguation page lists articles associated with the title Complex.
If an internal link led you here, you may wish to change the link to point directly to the intended article.