👉 Unallowed in mathematics refers to a situation where an operation or statement is not allowed, either due to mathematical constraints or other reasons. It often arises when one cannot perform an action because it violates some mathematical property or condition that needs to be met before it can be performed. For example: 1. If you want to calculate the area of a rectangle, but you are only given its length and width, then you cannot simply multiply these two numbers together without violating the constraint that they must be positive integers