Borel summation

Borel summation is a way of adding up an infinite number of numbers. It's like making a tower of blocks with an infinite number of blocks, so you can't just add them all up one by one—you need a special technique. With Borel summation, you can add up the infinite number of numbers by starting from the bottom and working your way up the tower. You take the number at the bottom of the tower and add it to the number one floor above it. Then, you take this sum and add it to the number two floors above it, and so on, until you reach the top. The sum of all the numbers in your tower is the answer you get from Borel summation.