<Dd> 1 + 1 + 1 + ⋯ = x--x = 0 . </Dd> <P> Adding 0 to both sides again gives </P> <Dl> <Dd> 0 + 1 + 1 + 1 + ⋯ = 0, </Dd> </Dl> <Dd> 0 + 1 + 1 + 1 + ⋯ = 0, </Dd>

Sum of all natural numbers from 1 to infinity