👉 Combinatory is a branch of mathematics that deals with the use of combinations in various contexts. It involves selecting objects from a collection of items based on certain conditions, such as order or repetition. Combinations are used in a variety of fields, including probability, combinatorics, and statistics, to describe the number of ways an event can occur given a set of possible outcomes. Combinatory is also known as "combination theory" or "combinatorial mathematics." It has its roots in