Mathpedia
What is factorial n and how is it denoted? What is factorial of 100?
Factorial n is the product of the first n natural numbers and denoted by n!. In mathematics, n factorial is, n! = n×(n−1)×(n−2)× … ×3×2×1 […]
natural numbers
Set Theory
Set Theory : Introduction, Origin, Definition of Sets, Examples of Sets
For example, the group of all states of India is a set, because this group is a well-defined collection of objects. […]