Talk:Dimension (vector space)

Hamel dimension

Why is the Hamil dimension well-defined? I would like to find a proof.

Have a tolerable existence. Eli <ecooper@mathstat.umass.edu>

Have a look at the following web-page: http://www.uwm.edu/~adbell/Teaching/631/1999/631notes7L/node1.html . I haven't read it, but it seems to cover what you want. It first does the finite-dimensional case, and then explains how to modify the proof to deal with the infinite-dimensional case. --Zundark 09:47, 8 Oct 2003 (UTC)

I'm CERTAIN that the general case needs the axiom of choice. A Geek Tragedy 16:07, 1 July 2007 (UTC)

i am new to this. The first example is a three by three matrix, therefore, I cannot tell if the dimension dim = 3 is the number of rows or number of columns. — Preceding unsigned comment added by 156.26.32.165 (talk) 00:16, 17 May 2013 (UTC)

Is the word 'Bases' the plural of 'Basis' in this article? 132.45.121.6 (talk) 21:53, 1 February 2017 (UTC)

Rn is ambiguous notation - "space" vs "vector space"?

The notation "${\mathbb{ℝ}}_n$ is used ambiguously (in Wikipedia articles and elsewhere) to deonte both a vector space and a more general sort of space that need not be a specific vector space". (For example, the polar representation of a 2D vector gives coordinates that are elements of the "space" ${\mathbb{ℝ}}_2$, but the "vector space ${\mathbb{ℝ}}_n$" implies the operations on the space are those used for Cartesian coordinates.) It would be worthwhile to clarify the difference between "dimension of a space" and "dimension of a vector space" or explain the relation between the two concepts

Tashiro~enwiki (talk) 20:28, 3 February 2017 (UTC)