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Sum

The addition of two numbers gives a sum

factor + factor = sum

 


Explanation

You can add several numbers, and also infinitely many numbers. With the sigma symbol you write it as

∑ = 1 + 2 + 3 + 4 + 5 + ··· 

An integral is even the sum of an infinite number of infinitely small quantities. With the sum sign you can write that as

 v du

 


Example 1

Goldbach's conjecture says something about the sum of prime numbers, such as

10 = 3 + 7 = 5 + 5

 


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