The blame should be put squarely on the shoulders of tophatter.com. They know the quality of what is being sold and choose to look the other way for the sake of making commission and sales fees on these imitation goods. In my estimation and also the interpretation of the law this is outright FRAUD.
Inverse operations are opposite operations that undo each other. Addition and subtraction are inverse operations. Multiplication and division are inverse operations.
Recursion is a type of divide-and-conquer technique used to solve difficult programming problems by reducing a problem to simpler, but identical, sub-problems.. The sub-problems are then reduced to sub-sub-problems.. This multi-step reduction process continues until a trivial case is reached.