# Why string theorist use the following result? [duplicate]

$1+2+3.......$so on $= -1/12.$ I have seen a few proofs of this result. And I hope most of you are familiar with them.

• Why string theorist use this ambiguous result in string theory, when assigning a value to a divergent sum is not acceptable to many mathematician?
• If this result is true; does it consolidate the belief that nature of ultimate reality cannot be perceivable by human mind.