John D. Cook personal blog
Don’t invert that matrix (2010)
There is hardly ever a good reason to invert a matrix. What do you do if you need to solve Ax = b where A is an n x n matrix? Isn't the solution A−1 b? Yes, theoretically. But that doesn't mean you need to actually find A−1. Solving the equation Ax = b is
- Points
- 133
- HN comments
- 88
- Submissions
- 3
- Cited by
- 8 commenters
Math & AlgorithmsSoftware Engineering2016
On Hacker News
| Submitted | Title on HN | Points | Comments |
|---|---|---|---|
| May 12, 2016 | Don’t invert that matrix (2010) by egjerlow | 133 | 42 |
| Jan 19, 2010 | Don’t invert that matrix by KonaB | 90 | 38 |
| Dec 24, 2010 | Don't invert that matrix by isomorph | 68 | 8 |
Cited in comments
Linked from 8 Hacker News comments by 8 different people, from Sep 2012 to May 2021.
Most recent:
- wenc · May 5, 2021
- curiousgal · Dec 25, 2019
- effie · Nov 26, 2017
- R_haterade · Sep 27, 2017
- schmit · Feb 25, 2017
- plg · Aug 5, 2016
