Constructibility

Look up constructibility or constructible in Wiktionary, the free dictionary.

Constructibility or constructability may refer to:

• Constructability or construction feasibility review, a process in construction design whereby plans are reviewed by others familiar with construction techniques and materials to assess whether the design is actually buildable
• Constructible strategy game, a tabletop strategy game employing pieces assembled from components

Mathematics

• Compass-and-straightedge construction
• Constructible point, a point in the Euclidean plane that can be constructed with compass and straightedge
• Constructible number, a complex number associated to a constructible point
• Constructible polygon, a regular polygon that can be constructed with compass and straightedge
• Constructible sheaf, a certain kind of sheaf of abelian groups
• Constructible set (topology), a finite union of locally closed sets
• Constructible topology, a topology on the spectrum of a commutative ring y in which every closed set is the image of Spec(B) in Spec(A) for some algebra B over A
• Constructible universe, Kurt Gödel's model L of set theory, constructed by transfinite recursion
• Constructible function, a function whose values can be computed in a number of steps or a number of Turing-machine cells of order given by the function itself

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