# Talk:Generalized inverse

## Multiple linear regression

I am reading the articles about the pseudoinverse and wondering about what is the difference between that and multiple linear regression. In another word, if I have a same set of linear equations, using the pseudoinverse method or linear regression, should I get same solution? Thanks. Simonliang (talk) 00:55, 29 September 2008 (UTC)

I'm thinking of changing or removing the construction formulae for the left and right inverses, for three reasons:

1. The formulae only apply when the matrix ${\displaystyle A}$ has full rank;
2. When ${\displaystyle A}$ is poorly conditioned, the formulae suffer from numerical issues;
3. The formulae, if they apply at all and give sufficiently accurate results, give only the Moore-Penrose pseudo-inverse, and do not constitute general formulae for the construction of generalized inverses (which are the subject of the article).

Any comments before I press on with my edits? Cooperised (talk) 22:35, 3 June 2013 (UTC)

## Article needs examples

This article could be improved if someone knowledgeable of the subject would insert a section with examples, preferably of all types of generalized inverse addressed in the article.—Anita5192 (talk) 01:58, 4 February 2017 (UTC)

I inserted examples of some types of generalized inverse. I still think it would be best to have an example of each type.—Anita5192 (talk) 16:54, 11 October 2017 (UTC)

## The external link does not work

The external link does not work: Article 15A09 in: 15A09 Matrix inversion, generalized inverses in Mathematics Subject Classification, MathSciNet search — Preceding unsigned comment added by Sohale (talkcontribs) 21:51, 10 March 2017 (UTC)

The dead link is now removed.—Anita5192 (talk) 23:13, 10 March 2017 (UTC)