### Some articles on *constructible*:

Compass And Straightedge Constructions -

... is a bijection between the angles that are

**Constructible**Angles... is a bijection between the angles that are

**constructible**and the points that are**constructible**on any**constructible**circle ... The angles that are**constructible**form an abelian group under addition modulo 2π (which corresponds to multiplication of the points on the unit circle viewed as complex numbers) ... The angles that are**constructible**are exactly those whose tangent (or equivalently, sine or cosine) is**constructible**as a number ...Lefschetz Hyperplane Theorem - The Lefschetz Theorem in Other Cohomology Theories

... The motivation behind Artin and Grothendieck's proof for

... The motivation behind Artin and Grothendieck's proof for

**constructible**sheaves was to give a proof that could be adapted to the setting of étale and -adic cohomology ... Up to some restrictions on the**constructible**sheaf, the Lefschetz theorem remains true for**constructible**sheaves in positive characteristic ...**Constructible**Polygon

... In mathematics, a

**constructible**polygon is a regular polygon that can be constructed with compass and straightedge ... For example, a regular pentagon is

**constructible**with compass and straightedge while a regular heptagon is not ...

Space Hierarchy Theorem - Statement

... Formally, a function is space-

... Formally, a function is space-

**constructible**if and there exists a Turing machine which computes the function in space when starting with an input, where represents a string ... the common functions that we work with are space-**constructible**, including polynomials, exponents, and logarithms ... For every space-**constructible**function , there exists a language that is decidable in space but not in space ...**Constructible**Polygon - Conditions For Constructibility - Connection To Pascal's Triangle

... are multiples of distinct Fermat primes, and hence 31

**constructible**odd-sided regular polygons ... composite, so the following rows do not correspond to

**constructible**polygons ... Fermat primes exist, and is therefore unknown how many odd-sided

**constructible**polygons exist ...

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