The English used in this article or section may not be easy for everybody to understand. (September 2020)
In mathematics, a constructive proof is a method of proof that shows the existence of a mathematical object—by giving a method on how to create the object. The other type of proof is called non-constructive proof, or existence proof: It shows that an object must exist, but does not give a way how to construct it.
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- "7.4: Constructive Versus Non-Constructive Proofs". Mathematics LibreTexts. 2019-10-18. Retrieved 2020-09-23.
- "Constructive Versus Existential Proofs". zimmer.csufresno.edu. Retrieved 2020-09-23.