On June 7, 1742, Christian Goldbach wrote a letter to renowned mathematician Leonhard Euler. In it, he conjectured that every even number greater than 2 can be expressed as the sum of two primes.
The starting point for rigorous reasoning in mathematics is a system of axioms. An axiom is a statement that is assumed, without demonstration, to be true. It is usually self-evident, for example, ...
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