Elementary proof
From Conservapedia
An elementary proof or elementary technique in mathematics is a proof that uses only real numbers or real analysis rather than the use of complex analysis.[1] Elementary proofs cannot be broken down into smaller proofs of the same proposition.
The Prime Number Theorem has long been proven using complex analysis (Riemann Zeta function), but in 1949 and 1950 an elementary proof by Paul Erdos and Atle Selberg earned Selberg the highest prize in math, the Fields Medal. In contrast, Andrew Wiles' proof of Fermat's Last Theorem did not use elementary techniques and he did not receive the Fields Medal for his work but rather an honorary silver plate from the International Mathematical Union.[2] (However, it can be concluded that Wiles' use of "non-elementary" techniques was not the reason he was not given the Fields Medal: Wiles was 41 years old when he proved Fermat's Last Theorem and was therefore ineligible for the Fields Medal due to his age. The Fields Medal is awarded only to mathematicians no older than 40.[3])
