Fold may refer to:

• Above the fold, a graphic design concept originating in newspapers
• Fold (from the Saxon "falod") meaning a staked-off pasture area (e. " Above the fold " is a Graphic design concept that refers to the location of an important News story or a visually appealing Photograph on the g. Sheepfold, an enclosure for sheep) and used in place names such as the Fold Villages. These are a number of villages in the Weald of Surrey and Sussex, whose suffix of -fold indicates a common origin as Saxon settlements in cleared
• Catastrophe theory#Fold catastrophe, one of the most basic objects in singularity theory. This article refers to the study of dynamical systems For other meanings see Catastrophe.
• -fold, a suffix added to a cardinal number signifying "multiplied by"
• skin fold
• In computing:
  • Fold (higher-order function), a family of higher-order functions in functional computer programming
  • Fold (Unix), a program in the GNU Core Utilities

Fold or folding may refer to:

• folding, in poker, the act of withdrawing from a hand rather than meeting the bet
• Paper folding (see also below under Mathematics)
  • origami, the art of paper folding
• pattern welding, the folding of metal
• bankruptcy
• Folding in cooking refers to a gentle mixing technique, somewhere between a cutting motion and a stirring motion, used to incorporate ingredients into a batter or other mixture, such as for a cake. This article describes cardinal numbers in mathematics For cardinals in linguistics see Names of numbers in English. Skin folds are areas of Skin where it folds Many skin folds are distinct heritable anatomical features and may be used for identification of animal Species, while In Functional programming, fold, also known variously as reduce, accumulate, compress or inject, is a family of Higher-order In Computer science, functional programming is a Programming paradigm that treats Computation as the evaluation of mathematical functions and The GNU Core Utilities or coreutils is a package of GNU Software containing many of the basic tools such as cat, Ls This article describes only the common terms rules and procedures of betting in poker Paper folding is the Art of folding Paper; it is known in many societies that use paper (from oru meaning "folding" and kami meaning "paper" is the ancient Japanese Art of Paper folding. Pattern welding is the practice in Sword and Knife making of forming a blade of several Metal pieces of differing composition that are forge-welded Bankruptcy is a legally declared inability or impairment of ability of an individual or organization to pay their Creditors Creditors may file a bankruptcy petition against Cake is a form of Food that is usually sweet and often baked.
• Folding (Book folding) in the publishing process refers to the folding of the pages of the book, after printing and before binding
• In science:
• fold (geology)
• in computer programming:
  • case folding is a term denoting the conversion of all characters in a string to lower- or upper-case
  • code or text folding (as in a folding editor for folding code or text)
  • In functional languages folding refers to processing some data structure and accumulating a result. Book folding is the stage of the Book production process in which the pages of the book are folded after Printing and before binding. See also Folding The term fold is used in Geology when one or a stack of originally flat and planar surfaces such as Sedimentary Case folding is a term denoting the conversion of all characters in a string to lower or upper-case typically to make case-insensitive comparisons Code folding is a feature of some Text editors Source code editors and IDEs that allows the user to selectively hide and display sections of a currently-edited A folding editor is a Text editor which supports text folding or Code folding, a mechanism allowing the user to hide and reveal blocks of text&mdashusually named In Computer science, functional programming is a Programming paradigm that treats Computation as the evaluation of mathematical functions and In Functional programming, fold, also known variously as reduce, accumulate, compress or inject, is a family of Higher-order
  • Mathematics of paper folding
• folding (chemistry) or intramolecular self-assembly of molecules to assume a specific shape
  • protein folding
  • Folding@home, a distributed computing project designed to perform computationally intensive simulations of protein folding and other molecular dynamics. The Art of Paper folding, or Origami, has received a considerable amount of mathematical study In chemistry folding is the process by which a molecule assumes its shape or conformation. Protein folding is the physical process by which a Polypeptide folds into its characteristic and functional three-dimensional structure. Folding@home (sometimes abbreviated as FAH or F@h) is a Distributed computing (DC project designed to perform computationally intensive simulations
• Aliasing#Folding, as used in signal processing

See also

• folder
• bifold door

This article applies to signal processing including computer graphics A door is a panel or barrier usually hinged or sliding that is used to cover an opening in a Wall or partition going into a building or space

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