👉 In mathematics, a "qed" is a statement that can be proven true or false without explicitly providing an argument. It is often used in logic and mathematical proof to indicate whether a proposition is logically valid or not.
For example:
Let's say we want to prove that the sum of two positive integers is always greater than or equal to their difference. We can use the "qed" statement to assert that this is true, as it is always true regardless of how large the numbers are