👉 In mathematics, "unifying" is a concept that refers to a set of properties or principles that are shared by all members of a group or collection. This can be thought of as a way of stating that two sets have something in common, such as having the same elements or having the same structure. For example, consider the set of all prime numbers less than 100. All primes between 2 and 37 are odd numbers (since they cannot be divided by any number