3Blue1Brown
https://www.3blue1brown.com/topics/linear-algebra24.09.2016 · Essence of linear algebra preview The introduction to a series on visualizing core ideas of linear algebra. Chapter 0 Aug 5, 2016. Vectors, ... The determinant The determinant has a very natural visual intuition, even though it's formula can make it seem more complicated than it really is. Chapter 6 Aug 10, 2016.
Finite difference method - Wikipedia
https://en.wikipedia.org/wiki/Finite_difference_methodIn numerical analysis, finite-difference methods (FDM) are a class of numerical techniques for solving differential equations by approximating derivatives with finite differences.Both the spatial domain and time interval (if applicable) are discretized, or broken into a finite number of steps, and the value of the solution at these discrete points is approximated by solving algebraic equations ...