Tag: number theory
Teaching Kids Programming: Videos on Data Structures and Algorithms Introduction to Combinatorial Mathematics (2): Catalan Numbers Catalan numbers are one of the most important sequences in combinatorics. They appear …
Understanding the Sigma Function: Divisors, Multiplicativity, and the Formula Understanding the Sigma Function: From Divisors to a Powerful Closed Formula Why the Sigma Function Is Multiplicative: A Step-by-Step Derivation …
Teaching Kids Programming: Videos on Data Structures and Algorithms How to Prove √2 Is Irrational — Two Methods (Proof by Contradiction & Geometric Infinite Descent) Introduction The statement “√2 …
We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write a …
Find the least number of perfect square numbers (1, 4, 9, 16, 25 …) which sum to the given integer n. For example, given n = 5, return 2 …
