Talk:Signed zero

message: Delete, no sources, nothing.
:Positive or negative nothing? --A D Monroe III(talk)  02:24, 6 November 2017 (UTC)
thread_title: Untitled

message: Given that the current AFD discussion appears to be headed toward a "keep" result, should this page be moved somewhere after it is over? Maybe Negative zero? NatusRoma 20:11, 17 October 2005 (UTC)
replies: text: How about −0? (That's minus zero rather than "hyphen zero".) —BenFrantzDale 05:04, 20 December 2005 (UTC)

text: I second −0 (minus zero) like BenFrantzDale suggested. —Liyster 01:25, 12 January 2006 (UTC)
thread_title: Move?

message: Shouldn't we specify that x/0 is undefined?  It's lim(x/n,n,0) = infinity, not x/0 = infinity.
:But in IEEE 754, it isn't undefined! Melchoir 01:27, 25 October 2006 (UTC)
replies: text: Those two divide by zero examples should be using limits. Just because a computer's nutjob interpretation doesn't care, it doesn't mean we shouldn't. Idyll M (talk) 10:52, 13 June 2008 (UTC)

text: The paragraph dealing with this doesn't make absolutely clear that the second sentence refers strictly to the IEEE definition and not the mathematical definition. Also the sentence that says when division by zero is undefined includes infinity/infinity, which is not division by zero. I am hesitant to make changes because I am not a mathematician but somebody needs to look at this. 6StringJazzer (talk) 18:16, 22 September 2011 (UTC)
thread_title:  Properties and handling 

message: In IEE floating point, -0 have special meaning in complex number.
   Sqrt( -1 + 0i ) = 0 + i
   Sqrt( -1 - 0i ) = 0 - i
-- 219.78.124.173 17:02, 4 February 2007 (UTC)
thread_title:  Complex Number 

message: The article is a bit unusually inaccurate on this issue. The C family is mentioned and so is Java, but the function that "should" be used instead seems to be a C/C++ function, apparently without a Java equivalent (as none is mentioned). I don't recall Java having the problem, though that doesn't have to mean it doesn't exist. It seems odd to advise programmers in general to use a specific function that seems to be C-specific.
If the standard is language independent, refering to the name of the function doesn't make much sense unless most libraries have it (the equivalent functions for other languages should be named too), otherwise the programmer would be advised to implement it, rather than use it (because it wouldn't be a function, but merely a language independent description of a function). — Ashmodai (talk · contribs) 23:06, 26 October 2006 (UTC)
thread_title:  Programming languages 

message: I took the negative zero section from the zero article and put it under Zero and Negative Zero.  It seems like it fits but I'm no expert.  Does it belong there? --24.8.206.37
:Frankly, I feel it's redundant. There's nothing in that section not already covered in the article. By the way, when you copy text from one article to another, you should make a notation in the edit summary (this has to do with the attribution requirements of the GFDL; if you're not careful about those you could be seen as infringing on the copyright of the original authors). --Trovatore 20:23, 3 May 2007 (UTC)
replies: text: Thanks, I didn't know that.  I don't edit a lot.  --24.8.206.37 
Hey everyone, It seems like this article's information could be merged with zero and then this page could simply redirect there.--Cronholm144 21:47, 12 May 2007 (UTC)

text: The article Zero contains a section titled "Negative zero". It's one paragraph long, which is appropriate for a general article on zero. It contains a link to this article, which contains in-depth material that wouldn't belong in the general article. This article organization strategy is known as Wikipedia:Summary style. Melchoir 09:19, 13 May 2007 (UTC)

text: Well, as abstract topics, 0.999... confuses lots of people, and 1 − 2 + 3 − 4 + · · · has almost no individual importance. For that matter, 0.999... isn't all that important, and 1 − 2 + 3 − 4 + · · · is pretty confusing. Yet our articles on these two topics are Featured Articles. Should they not exist after all? Melchoir 09:47, 13 May 2007 (UTC)
thread_title:  Zero 

message: I believe 0− is 'more correct' for a limit approaching zero from the negative direction:  I haven't seen −0 used to mean that before in mathematics.
— DIV (128.250.204.118 06:01, 1 September 2007 (UTC)
replies: text: I agreed with 0− (superscript). But I could not accept 0− (subscript) stated in the first section because I have never seen it elsewhere. --Octra Bond (talk) 10:28, 9 November 2008 (UTC)
replies: text: I agree with you both. It would be surprising to see that simply because −0 = 0. The minus sign can be placed any other place except on the left side. I remember 0− (no subsript). 130.243.135.39 (talk) 06:00, 12 July 2009 (UTC)
thread_title:  Limit 

message: The examples include:
(+0) + -0 = 0
I assume that (+0) and 0 are the same thing here, but it would be good to explicitly say.
Bobbyi (talk) 14:31, 8 May 2008 (UTC)
thread_title:  (+0) vs 0 

message: If I read this article and think "What would be a proper title?" "Signed zero" seems to be the only answer I can come up with. In fact "−0" is indeed a strange name for it, and "−0 (number)" is even stranger..
This is also the phrase they use in IEEE P754 pdf.
Doing this, the article could expand, describing the algebra of signed zero (with signed infinity?), giving the subject a more formal treatment and mathematical rigor.
This exotic mathematical area is interesting, in particular because it is applied in computer science, and it deserves a good name!
For now, "Signed zero" redirects here, of course we would reverse that and not deleting "−0 (number)".
What do you think? Discuss! Or move it! (I don't know how to rename or move the page.) 130.243.135.39 (talk) 10:24, 14 July 2009 (UTC)
replies: text: I definitely agree signed zero would be a better name. Dmcq (talk) 16:36, 14 July 2009 (UTC)

text: Please leave it under the current title. See section 1 of this talk page. keka (talk) 17:25, 14 July 2009 (UTC)
replies: text: That section didn't discuss signed zero which is what the IEEE standard uses and describes the subject better. Dmcq (talk) 17:35, 14 July 2009 (UTC)

text: User C S thinks (see above) visitors first reaction is "WTF is this an article?". He says a good lead would answer this question. But I also think he agrees with me that a more descriptive title would not cause this reaction in the first place. Remember, "minus zero" means nothing but zero if you don't have a priory knowledge that your zeros are signed! 130.243.135.39 (talk) 09:59, 15 July 2009 (UTC)
replies: text: While it's dangerous to extrapolate what I would think from one situation to the next, 130.X has guessed well of my approval :-)  If the IEEE uses this term and it's more descriptive, why not use it.  --C S (talk) 02:29, 31 July 2009 (UTC)
thread_title:  Move this page to "Signed zero"? 

message: I think it is very important that we add a section on the quote "I got a negative zero!"  —Preceding unsigned comment added by 96.255.76.120 (talk) 02:33, 4 July 2010 (UTC)
replies: text: I did a google and it didn't seem to have a WP:reliable source or even be in any tiny way notable. Dmcq (talk) 11:48, 4 July 2010 (UTC)

text: I once had an old electromechanical printing adding machine that could handle negative numbers. It reported zero as negative when I entered "n-" then "n+" and hit the total. Result, "0.00-*"knoodelhed (talk) 01:44, 6 November 2017 (UTC)
thread_title:  I got a negative zero! 

message: The article state that x + (\pm 0) = x\,\!. However, according to section 6.3 of the IEEE 754 floating point standard (-0) + 0 = 0\,\!, which contradicts the statement.  — Preceding unsigned comment added by 141.3.44.17 (talk) 14:03, 25 November 2013 (UTC)
replies: text: I've corrected it. This is true only for x different from 0 (assuming "=" means here identical Level-2 values). Vincent Lefèvre (talk) 18:22, 25 November 2013 (UTC)
thread_title:  x + 0 = x 

message: I'm wondering whether this page should be removed from the "Integers" category. Indeed, when considering a signed zero, it is not in the sense of the integer 0 in general. Moreover, this page is already in the "0 (number)" category, which is a subcategory of the "Integers" category, so that this removal would not be a major loss.
And if this category is kept, what should the sort key be, considering the consistency with the other pages in this category?
Vincent Lefèvre (talk) 14:48, 17 June 2018 (UTC)
replies: text: I don't feel strongly about it either way, but you make a good case.  I have no objection if you want to remove it. --Trovatore (talk) 04:13, 18 June 2018 (UTC)
replies: text: OK, done. Vincent Lefèvre (talk) 21:18, 19 June 2018 (UTC)
thread_title:  "Integers" category 

message: JavaScript has positive zero and negative zero. Recently the Intl.RelativeTimeFormat API was introduced.
This presents a good example of a use-case where distinguishing between positive zero and negative zero is meaningful:
const rtf = new Intl.RelativeTimeFormat('en')
rtf.format(0, 'hours') // 'in 0 hours'
rtf.format(-0, 'hours') // '0 hours ago'
I think this would be worth mentioning in the article.
CesarAndreu (talk) 22:23, 27 February 2019 (UTC)
thread_title:  Practical use-case of negative zero in a programming language  

message: I think there is a great example that would benefit understandability for someone who first encounters Signed Zero concept:
In geometry, in 3D space, Zero has to be Signed to represent which side the 3D object "looks at" (Normal Vector). A vector can have magnitude of 0, but be directed to either -0 or +0 on any axis. Practically, it is very common to open any popular 3D modeling software (MAX, Blender etc) and create a simple geometry - then select any polygon defined by three vertices and change it's Normal Vector from +0 to -0 and see visually (on screenshot as well) how the triangle of the polygon defined by either +0 or -0 would "look" (be rendered) in opposite directions.
In fact, the lack of visualization on Minus Zero and Plus Zero Normal Vectors is commonly the hardest part to understand by CGI students and newbie 3D-modellers\programmers. If it is to be included in the page, i would gladly provide the illustrations (screenshots) with Vectors pointing to -0 and +0  — Preceding unsigned comment added by M8sterMind (talk • contribs) 14:00, 6 December 2021 (UTC)
thread_title:  Use in geometry and 3D-space-modeling