Written by Danny Siu who lives in Hong Kong. You should follow him on Twitter
Pseudoinverse and the shortest solution to least squares
May 03, 2020 | 2 min readThis posts show the relationship between pseudoinverse and the shortest solution to least squares.
When the modulus m is a product of distinct primes, the decryption will always work
April 25, 2020 | 2 min readThis post is about the RSA decryption. As long as the modulus m is a product of distinct primes, the decryption will always work even the message a and m are not relatively prime.
How to build multiple counters using React and Redux
April 22, 2020 | 6 min readThis post shows you how to build multiple counters using React and Redux.
Using Fermat Number to prove the infinity of primes
April 19, 2020 | 2 min readThis post is about how to use Fermat Number to prove the infinity of primes.
SVD and basis
April 19, 2020 | 3 min readThis post is about the left and right singular vectors of Singular Value Decomposition of a matrix A can be the basis to the column space and row space of A respectively.