Talk:Magnitude (mathematics)

should this

$s={\sqrt {u^{2}+v^{2}+w^{2}}}$

be this

$|s|={\sqrt {u^{2}+v^{2}+w^{2}}}$

or this

$\|s\|={\sqrt {u^{2}+v^{2}+w^{2}}}$

? - Omegatron 13:39, Sep 27, 2004 (UTC)

What are you even refering to? I don't see "s" in the article. Aucaman 12:22, 1 November 2005 (UTC)

It is in http://en.wikipedia.org/w/index.php?title=Magnitude_%28mathematics%29&oldid=3064683 Timothy Clemans 19:56, 10 February 2006 (UTC)

"Propagation of error"

I have removed the new section "propagation of error" added by User:Wykypydya on 13 April, 2007. In my opinion the section was irrelevant, in the context of this article.

I also notice that the author of this section added "fact" and "expert" tags right from the get go. That is a very odd practice. If you don't understand the subject (i.e., if you already need an expert's help before you start writing) then please don't burden the rest of us. Be sure you know what you're writing about, in other words. DavidCBryant 11:23, 20 April 2007 (UTC)

Two sections are lame/weak/poorly constructed

There are problems with two of the sections. The logarithmic section unhelpfully states that a log scale is 'helpful' in comparing magnitudes. It doesn't define what is meant, and in fact it is wrong. Log scales are used to compare the RATIOs of magnitudes often the ratio being relative to a standard. A log scale is one of many non-linear scales, unfortunately this article completely ignores the others. It also doesn't seem to understand that metric spaces have a norm, and this should be mentioned. The Order of Magnitude section REQUIRES references! What it claims is also WRONG. "Order of Magnitude" does NOT imply anything about a change. It is simply the power of 10 that a value has. It is NONSENSE to claim that the term has anything to do with "moving the decimal point". I challenge this section. It should be removed. (It appears to have been written by a troll: geek culture?! Apparently, the "author" (to use the term generously) has never heard of the the Big O function (see Big O notation), which is used in computer science (and advanced mathematics).) This is a really, really weak article.173.189.72.93 (talk) 07:04, 16 November 2014 (UTC)