Talk:0 (number)

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[edit] Divisors

The article states that "all numbers" are divisors of zero, however, this is not strictly true as it can't be divided by itself as division by zero is undefined. Maybe this should be changed.RMFan1 (talk) 12:53, 22 February 2008 (UTC)

Formally, 0 divides 0, as 0 × 0 = 0, even though 0 / 0 is undefined. — Arthur Rubin | (talk) 13:33, 22 February 2008 (UTC)

Does any1 ever think that maybe we need better definitions? all of this zero talk is getting nowhere. How can it divide itself if the result is undefined? —Preceding unsigned comment added by Amyx231 (talk • contribs) 01:34, 3 March 2008 (UTC)

[edit] History

The following text contributed by 61.95.202.59 is moved here because virtually all of its facts are already in the article, and the opinions are not supported by citations. — Joe Kress (talk) 05:55, 26 February 2008 (UTC)

I did a quick search and found the text was a copy from A history of Zero. I think we need to delete the versions that contain it. (see the section below - 00:44, 27 February 2008 (UTC)) Please try searching on the net if you find a long text without links in a single edit. - TAKASUGI Shinji (talk) 23:12, 26 February 2008 (UTC)
This is a mind boggling article! I find the history really hard to get my head around. But why are there two history sections, one following the other? Perhaps part of my boggling could be reduced if the History section was consolidated into one. For me, it would also help if it was then expanded, to include some more help to conceptualise how old worlds functioned WITHOUT a zero, and how the need for it evolved. LookingGlass (talk) 06:54, 4 April 2008 (UTC)
There is one section entitled "History", which has three subsections:
  1. "History of zero",
  2. "Rules of Brahmagupta", and
  3. "Zero as a decimal digit".
I think it might be clearer if there were just two subsections:
  1. "History of zero as a decimal digit" and
  2. "History of zero as a number".
These are quite independent concepts. One can have a notation for a "missing digit" in a place-value system to distinguish "1¤2" (one hundred and two) from "12" (twelve) without having a concept of a next number in the sequence 3, 2, 1, ?. And one can have a concept of such a number, and possibly a notation for it, without having a digit 0 – in fact, without having a place-value system with digits.  --Lambiam 19:43, 4 April 2008 (UTC)

[edit] Copyright violation

Resolved.

As I have written above, the article of the versions 2008-02-25T07:20:35 through 2008-02-25T21:59:38 and the talk page of the 2008-02-26T05:55:57 version violate the copyright. They should be deleted from the revision history. - TAKASUGI Shinji (talk) 00:44, 27 February 2008 (UTC)

According to Wikipedia:Copyright problems, we don't need to delete old versions that violate copyrights, and reverting the article is enough. - TAKASUGI Shinji (talk) 02:40, 28 February 2008 (UTC)

[edit] Perrin numbers

The article says "Zero is the first Perrin number." Is it really? Sure, it's P(1), but P(0) is 3. So it depends on whether you call P(0) the first (since there are none before it) or the zeroth. In any case I'm not sure whether this fact is interesting enough to put here. It seems to be just the ordinary whole number zero, so is it really an 'extended' use of zero? I had never heard of Perrin numbers before and I only skimmed the article, so I can't really judge.--Angelastic (talk) 15:07, 29 February 2008 (UTC)

[edit] Vandalism

Invented in India? Sounds suss to me... Lady Raven. 12:43, 19 April 2008 (UTC)

And what is wrong with something invented in India? 131.227.210.149 (talk) 11:34, 9 May 2008 (UTC)

Sounds 'suss'? I wonder how narrow minded some people could be. It also proves the level of their general knowledge.  S3000  ☎ 11:40, 9 May 2008 (UTC)