Definition: The term "cotunnite" is a word that is commonly used in mathematics and physics. It refers to a mathematical object or function that satisfies certain properties. Specifically, it can be defined as an injection from the set of real numbers onto itself, where every element of the domain has a unique preimage. For example, the cotunnite functions are those that satisfy the following conditions: 1. The range of the function is the set of all real numbers. 2. For any two elements