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Making one mathematical object out of another

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Quick description

It is often possible to prove that an object of type X exists with certain properties exists by building it out of a suitable object of type Y. This page contains links to several other pages that discuss this phenomenon for various different choices of X and Y. (There are many other circumstances under which one might wish to build one kind of mathematical object out of another, but the articles below are focused on existence theorems.) For methods of turning a mathematical object into another one of the same kind, see the companion page on building complicated examples out of simple ones.

Links to pages about using one kind of object to build another

Note iconContributions wanted This article could use additional contributions. List needs to be greatly expanded and articles written

Turning groups into algebras

Turning topological spaces into groups

Turning topological spaces into algebras

Using ordinals to build Banach spaces

Algebraic constructions of graphs

Geometrical constructions of graphs

Building manifolds using polynomials

Algebraic constructions of sets of integers with given properties

Building topological spaces out of groups

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