In 1742, Goldbach stated, in a letter to Euler, that every even integer exceeding 2 can be written as a sum of two primes. Let us call those even integers which can be represented as a sum of two primes the Goldbach-n...In 1742, Goldbach stated, in a letter to Euler, that every even integer exceeding 2 can be written as a sum of two primes. Let us call those even integers which can be represented as a sum of two primes the Goldbach-numbers. Let E(x) denote the number of展开更多
文摘In 1742, Goldbach stated, in a letter to Euler, that every even integer exceeding 2 can be written as a sum of two primes. Let us call those even integers which can be represented as a sum of two primes the Goldbach-numbers. Let E(x) denote the number of
