Matrix Factorization, Numerical Methods, Numerical Linear Algebra, Cholesky Decomposition, Hilbert Matrix.
https://www.computerhope.com/people/david_hilbert.htm https://en.wikipedia.org/wiki/David_Hilbert https://en.wikipedia.org/wiki/Cholesky_decomposition https://www.bookofproofs.org/history/andre-louis-cholesky/