dual pattern - ορισμός. Τι είναι το dual pattern
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Τι (ποιος) είναι dual pattern - ορισμός

POLYHEDRON WHOSE VERTICES CORRESPOND TO THE FACES OF ANOTHER ONE
Dual polyhedra; Dual polytope; Self-dual polyhedron; Self-dual polyhedra; Geometric dual; Dorman Luke; Dorman Luke construction; Polyhedral dual; Self-dual figure; Self-dual polytope; Dual tessellation; Canonical dual; Polyhedron dual; Dual (polyhedron); Tiling dual; Dual tiling
  • Canonical [[dual compound]] of cuboctahedron (light) and rhombic dodecahedron (dark). Pairs of edges meet on their common [[midsphere]].
  • The [[Infinite-order apeirogonal tiling]], {∞,∞} in red, and its dual position in blue
  • topological dual]].<br>Images from [[Kepler]]'s [[Harmonices Mundi]] (1619)
  • The [[square tiling]], {4,4}, is self-dual, as shown by these red and blue tilings
  • The dual of a [[cube]] is an [[octahedron]]. Vertices of one correspond to faces of the other, and edges correspond to each other.

Pattern (casting)         
  • The top and bottom halves of a sand casting mould showing the cavity prepared by patterns.  Cores to accommodate holes can be seen in the bottom half of the mould, which is called the ''drag''. The top half of the mould is called the ''cope''.
FORM USED IN CASTING TO REPLICATE A SHAPE
Pattern (foundry); Pattern-maker; Patternmaker (engineering)
In casting, a pattern is a replica of the object to be cast, used to prepare the cavity into which molten material will be poured during the casting process.
Pattern (sewing)         
  • Digital home sewing pattern
  • Marker-making by computer
  • Student tracing pattern onto fabric
  • Fitting a nettle/canvas-fabric on a [[dress form]]
  • Storage of patterns
  • Students cutting patterns in a sewing class
TEMPLATE FROM WHICH THE PARTS OF A GARMENT ARE TRACED ONTO FABRIC BEFORE BEING CUT OUT
Pattern making book; Pattern-making book; Patternmaking book; Sewing pattern; Dress pattern; Dress-maker's pattern; Pattern cutting; Pattern drafting; Pattern making
In sewing and fashion design, a pattern is the template from which the parts of a garment are traced onto woven or knitted fabrics before being cut out and assembled. Patterns are usually made of paper, and are sometimes made of sturdier materials like paperboard or cardboard if they need to be more robust to withstand repeated use.
Strategy pattern         
DESIGN PATTERN ENABLING SELECTION OF ALGORITHMS AT RUNTIME
Strategy Pattern; Policy pattern; Strategy design pattern
In computer programming, the strategy pattern (also known as the policy pattern) is a behavioral software design pattern that enables selecting an algorithm at runtime. Instead of implementing a single algorithm directly, code receives run-time instructions as to which in a family of algorithms to use.

Βικιπαίδεια

Dual polyhedron

In geometry, every polyhedron is associated with a second dual structure, where the vertices of one correspond to the faces of the other, and the edges between pairs of vertices of one correspond to the edges between pairs of faces of the other. Such dual figures remain combinatorial or abstract polyhedra, but not all can also be constructed as geometric polyhedra. Starting with any given polyhedron, the dual of its dual is the original polyhedron.

Duality preserves the symmetries of a polyhedron. Therefore, for many classes of polyhedra defined by their symmetries, the duals belong to a corresponding symmetry class. For example, the regular polyhedra – the (convex) Platonic solids and (star) Kepler–Poinsot polyhedra – form dual pairs, where the regular tetrahedron is self-dual. The dual of an isogonal polyhedron (one in which any two vertices are equivalent under symmetries of the polyhedron) is an isohedral polyhedron (one in which any two faces are equivalent [...]), and vice versa. The dual of an isotoxal polyhedron (one in which any two edges are equivalent [...]) is also isotoxal.

Duality is closely related to polar reciprocity, a geometric transformation that, when applied to a convex polyhedron, realizes the dual polyhedron as another convex polyhedron.