👉 In mathematics and computer science, an "indefectible" object is one that does not change its value or properties even if it is modified in a way that affects its definition. This concept is often used to describe mathematical objects that cannot be changed by any other means than being altered directly. For example, consider the following operation on a set of integers: replace each integer with the next larger integer (e.g., 10 becomes 11, 15 becomes 20
