Talk:Projection (mathematics)

For the Lay Person

I did not understand this article at all, it was very hard to read for the novice. — Preceding unsigned comment added by 195.8.168.252 (talk) 13:48, 27 October 2011 (UTC)[reply]

I second the previous comment, in particular the discussion of left inverses is not readable. If a projection is many-to-one, how does it have an inverse at all? And how does a map have a left inverse? Shouldn't it just have an inverse, period? Crisperdue (talk) 19:35, 2 September 2012 (UTC)[reply]

Notes & Queries

Jon Awbrey 16:52, 31 January 2006 (UTC) what about the inverse of projection function ? does it exist or not? —Preceding unsigned comment added by 220.227.98.203 (talk) 06:56, 11 September 2008 (UTC)[reply]

What does projection mean?

In the lead of the article it says:

a projection is any one of several different types of functions, mappings, operations, or transformations

This doesn't tell us very much. Is there a better description/definition for projection that captures the general meaning? pgr94 (talk) 07:19, 27 July 2010 (UTC)[reply]

Proposed Merge

I suggest that the new article combining dimensions be merged here. The term combining dimensions is just a naive way of referring to projection. The entire content of that article is to say that projection is a way to visualize aspects of a higher dimensional phenomenon, as is often done by certain physicists. As a use of projection, it perhaps can be dealt with here in a sentence. On its own, it will remain a stub forever. Bill Cherowitzo (talk) 19:38, 12 August 2012 (UTC)[reply]

Merge to linear algebra

There's already a very good article at Projection (linear algebra).