Generating Function

Find the number of subsets of {1,…,2000} whose sum is divisible by 5 - Olympiad level counting

related to

  • complex number & their roots
  • prime number / Riemann Hypothesis / Dirichlet series
  • fourriers series
Written on April 24, 2023, Last update on October 12, 2024
math 3blue1brown complex-number puzzle