Duplication, duplicate, and duplicator may refer to:

Biology and genetics

  • Gene duplication, a process which can result in free mutation
  • Chromosomal duplication, which can cause Bloom and Rett syndrome
  • Polyploidy, a phenomenon also known as ancient genome duplication
  • Enteric duplication cysts, certain portions of the gastrointestinal tract
  • Diprosopus, a form of cojoined twins also known as craniofacial duplication
  • Diphallia, a medical condition also known as penile duplication

Computing

  • Duplicate code, a source code sequence that occurs more than once in a program
  • Duplicate characters in Unicode, pairs of single Unicode code points that are canonically equivalent. The reason for this are compatibility issues with legacy systems
  • Data redundancy, either wanted or unwanted (in which case one resorts to data deduplication)
  • Content copying through cut, copy, and paste
  • File copying

Mathematics

  • Duplication, or doubling, multiplication by 2
  • Duplication matrix, a linear transformation dealing with half-vectorization
  • Doubling the cube, a problem in geometry also known as duplication of the cube
  • A type of multiplication theorem called the Legendre duplication formula or simply "duplication formula"

Technology

  • Duplicating machines, machines and processes designed to reproduce printed material, photocopying being among the best-known today; see also List of duplicating processes
  • Loop bin duplicator, a device designed to copy pre-recorded audio tapes
  • Double track, a method of railway design also known as track duplication
  • In road construction, conversion of a single carriageway into Dual carriageway

Art and fiction

  • Duplicate (1998 film), a Bollywood film directed by Mahesh Bhatt
  • Duplicate (2009 film), a 2009 Malayalam film
  • Duplicates, a 1992 television film starring Gregory Harrison and Kim Greist
  • The Duplicate, a 1988 children's book by William Sleater
  • Batman Duplicate, a villain in Batman: The Animated Series
  • "The Duplicate Man", a 1964 episode of The Outer Limits
  • The duplicator machine in Calvin and Hobbes
  • "Duplicate", a song by White Town from Peek & Poke
  • "Duplicates", a song by We Are the Physics from We Are the Physics Are OK at Music

Other uses

  • Duplicate publication, the publication same intellectual material by the same author twice
  • Reduplication, a morphological process in linguistics
  • Duplicate bridge, a popular variant of contract bridge
  • Duplicate Scrabble, a Scrabble variant popular in French and some other languages
  • "Decouple, duplicate, discriminate," the "three Ds" articulated by Madeleine Albright as necessary for NATO to avoid
  • Duplicate, another term for Body double in films

See also

  • Clone, the process of producing similar populations of genetically identical individuals that occurs in nature when organisms such as bacteria, insects or plants reproduce asexually
  • Copy (disambiguation)
  • Doppelgänger, a paranormal double of a living person
  • dup (disambiguation)
  • dupe (disambiguation)
  • Redundancy (disambiguation)
  • Symmetry, has two meanings. The first is a vague sense of harmonious and beautiful proportion and balance. The second is an exact mathematical "patterned self-similarity" that can be demonstrated with the rules of a formal system, such as geometry or physics