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👉 Involutory is a concept in mathematics that refers to a number system where every element has an inverse. In other words, if you have two numbers x and y such that x = -y, then there exists another number z such that z
x = z
y = 1. This means that the product of any number with itself is equal to 1. Involutory numbers are used in many areas, including cryptography, where they represent a certain type of encryption for secure communication

involutory