That statement is Goldbach's conjecture.
The volume of a unit sphere in a dimension that is one of these numbers can be written as pi to the k over k factorial. The function 2x over the quantity x minus 1 squared generates these numbers, which are an ideal in the natural numbers. The word describing these numbers also names permutations with positive signature. An unproven statement regarding them is that all but one of them can be written as the sum of two primes. That statement is Goldbach's conjecture. They share their name with functions for which f of negative x equals f of x, and when written in binary this kind of number ends in a 0. For 10 points, identify this set of numbers including 0, 2, 4, 6, and 8, the opposite of odd numbers.
The volume of a unit sphere in a dimension that is one of these numbers can be written as pi to the k over k factorial.
even numbers