ELI5: Explain Like I'm 5

Abelian and Tauberian theorems

Abelian and Tauberian theorems are theorems from mathematics which help us to relate the behavior of different kinds of sums.

A sum is when we add up two or more numbers. For example, 4 + 5 = 9 is a sum. Abelian and Tauberian theorems help us to study what happens when we add up a lot of numbers, like adding up all the numbers from 1 to 100.

The Abelian theorem tells us what happens if we look at the sum of "short" parts of a longer sum. For example, if we look at the sum of the numbers between 1 and 100 but we split it into 10 "parts", each containing 10 numbers, the Abelian theorem tells us what the overall sum of 1 to 100 will be.

The Tauberian theorem tells us the same thing, but in a different way. It tells us what happens if we look at the sum of "long" parts of a longer sum. For example, if we look at the sum of the numbers between 1 and 100 but we split it into 10 "parts", each containing 100 numbers, the Tauberian theorem tells us what the overall sum of 1 to 100 will be.

So, both the Abelian and Tauberian theorems help us to study what happens when we add up a lot of numbers, like the sum of the numbers from 1 to 100.