What is the symbol for undefined?












0












$begingroup$


Just how there is a symbol for no real solutions (the empty set) and there is DNE for does not exist, what symbol or abbreviation would you use for undefined?










share|cite|improve this question











$endgroup$








  • 1




    $begingroup$
    According to Math - Symbol for Undefined, dividing a number by $0$ may be represented by UNDEF, but the staff are unaware of any specific symbol meaning "undefined". For what it's worth, I also am unaware of any such symbol, at least anything which is generally accepted by the math community.
    $endgroup$
    – John Omielan
    Dec 23 '18 at 3:03












  • $begingroup$
    Not so fast, @JohnOmielan; sometimes it is possible to divide by $0$.
    $endgroup$
    – Shaun
    Dec 23 '18 at 3:30












  • $begingroup$
    I have seen a handful of authors simply write "undefined" where necessary.
    $endgroup$
    – Shaun
    Dec 23 '18 at 3:34






  • 1




    $begingroup$
    @Shaun Thank you for pointing out about wheel theory. I believe the staff at the Web site meant that in within the real/complex number field, dividing any non-$0$ value by $0$ is usually considered to be undefined, while $0$ divided by $0$ is often called indeterminate. However, in addition to wheel theory, there may be other math systems where division by $0$ is defined and consistent with those particular set of axioms and conditions. The important thing with terms and definitions is that it's explicitly specified, or at least quite clear, what they're referring to.
    $endgroup$
    – John Omielan
    Dec 23 '18 at 3:43








  • 1




    $begingroup$
    See math.stackexchange.com/q/61914/265466 and en.m.wikipedia.org/wiki/Undefined_(mathematics).
    $endgroup$
    – amd
    Dec 23 '18 at 7:26
















0












$begingroup$


Just how there is a symbol for no real solutions (the empty set) and there is DNE for does not exist, what symbol or abbreviation would you use for undefined?










share|cite|improve this question











$endgroup$








  • 1




    $begingroup$
    According to Math - Symbol for Undefined, dividing a number by $0$ may be represented by UNDEF, but the staff are unaware of any specific symbol meaning "undefined". For what it's worth, I also am unaware of any such symbol, at least anything which is generally accepted by the math community.
    $endgroup$
    – John Omielan
    Dec 23 '18 at 3:03












  • $begingroup$
    Not so fast, @JohnOmielan; sometimes it is possible to divide by $0$.
    $endgroup$
    – Shaun
    Dec 23 '18 at 3:30












  • $begingroup$
    I have seen a handful of authors simply write "undefined" where necessary.
    $endgroup$
    – Shaun
    Dec 23 '18 at 3:34






  • 1




    $begingroup$
    @Shaun Thank you for pointing out about wheel theory. I believe the staff at the Web site meant that in within the real/complex number field, dividing any non-$0$ value by $0$ is usually considered to be undefined, while $0$ divided by $0$ is often called indeterminate. However, in addition to wheel theory, there may be other math systems where division by $0$ is defined and consistent with those particular set of axioms and conditions. The important thing with terms and definitions is that it's explicitly specified, or at least quite clear, what they're referring to.
    $endgroup$
    – John Omielan
    Dec 23 '18 at 3:43








  • 1




    $begingroup$
    See math.stackexchange.com/q/61914/265466 and en.m.wikipedia.org/wiki/Undefined_(mathematics).
    $endgroup$
    – amd
    Dec 23 '18 at 7:26














0












0








0


0



$begingroup$


Just how there is a symbol for no real solutions (the empty set) and there is DNE for does not exist, what symbol or abbreviation would you use for undefined?










share|cite|improve this question











$endgroup$




Just how there is a symbol for no real solutions (the empty set) and there is DNE for does not exist, what symbol or abbreviation would you use for undefined?







notation terminology definition






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Dec 23 '18 at 3:32









Shaun

9,869113684




9,869113684










asked Dec 23 '18 at 2:54









Karankumar MageswaranKarankumar Mageswaran

42




42








  • 1




    $begingroup$
    According to Math - Symbol for Undefined, dividing a number by $0$ may be represented by UNDEF, but the staff are unaware of any specific symbol meaning "undefined". For what it's worth, I also am unaware of any such symbol, at least anything which is generally accepted by the math community.
    $endgroup$
    – John Omielan
    Dec 23 '18 at 3:03












  • $begingroup$
    Not so fast, @JohnOmielan; sometimes it is possible to divide by $0$.
    $endgroup$
    – Shaun
    Dec 23 '18 at 3:30












  • $begingroup$
    I have seen a handful of authors simply write "undefined" where necessary.
    $endgroup$
    – Shaun
    Dec 23 '18 at 3:34






  • 1




    $begingroup$
    @Shaun Thank you for pointing out about wheel theory. I believe the staff at the Web site meant that in within the real/complex number field, dividing any non-$0$ value by $0$ is usually considered to be undefined, while $0$ divided by $0$ is often called indeterminate. However, in addition to wheel theory, there may be other math systems where division by $0$ is defined and consistent with those particular set of axioms and conditions. The important thing with terms and definitions is that it's explicitly specified, or at least quite clear, what they're referring to.
    $endgroup$
    – John Omielan
    Dec 23 '18 at 3:43








  • 1




    $begingroup$
    See math.stackexchange.com/q/61914/265466 and en.m.wikipedia.org/wiki/Undefined_(mathematics).
    $endgroup$
    – amd
    Dec 23 '18 at 7:26














  • 1




    $begingroup$
    According to Math - Symbol for Undefined, dividing a number by $0$ may be represented by UNDEF, but the staff are unaware of any specific symbol meaning "undefined". For what it's worth, I also am unaware of any such symbol, at least anything which is generally accepted by the math community.
    $endgroup$
    – John Omielan
    Dec 23 '18 at 3:03












  • $begingroup$
    Not so fast, @JohnOmielan; sometimes it is possible to divide by $0$.
    $endgroup$
    – Shaun
    Dec 23 '18 at 3:30












  • $begingroup$
    I have seen a handful of authors simply write "undefined" where necessary.
    $endgroup$
    – Shaun
    Dec 23 '18 at 3:34






  • 1




    $begingroup$
    @Shaun Thank you for pointing out about wheel theory. I believe the staff at the Web site meant that in within the real/complex number field, dividing any non-$0$ value by $0$ is usually considered to be undefined, while $0$ divided by $0$ is often called indeterminate. However, in addition to wheel theory, there may be other math systems where division by $0$ is defined and consistent with those particular set of axioms and conditions. The important thing with terms and definitions is that it's explicitly specified, or at least quite clear, what they're referring to.
    $endgroup$
    – John Omielan
    Dec 23 '18 at 3:43








  • 1




    $begingroup$
    See math.stackexchange.com/q/61914/265466 and en.m.wikipedia.org/wiki/Undefined_(mathematics).
    $endgroup$
    – amd
    Dec 23 '18 at 7:26








1




1




$begingroup$
According to Math - Symbol for Undefined, dividing a number by $0$ may be represented by UNDEF, but the staff are unaware of any specific symbol meaning "undefined". For what it's worth, I also am unaware of any such symbol, at least anything which is generally accepted by the math community.
$endgroup$
– John Omielan
Dec 23 '18 at 3:03






$begingroup$
According to Math - Symbol for Undefined, dividing a number by $0$ may be represented by UNDEF, but the staff are unaware of any specific symbol meaning "undefined". For what it's worth, I also am unaware of any such symbol, at least anything which is generally accepted by the math community.
$endgroup$
– John Omielan
Dec 23 '18 at 3:03














$begingroup$
Not so fast, @JohnOmielan; sometimes it is possible to divide by $0$.
$endgroup$
– Shaun
Dec 23 '18 at 3:30






$begingroup$
Not so fast, @JohnOmielan; sometimes it is possible to divide by $0$.
$endgroup$
– Shaun
Dec 23 '18 at 3:30














$begingroup$
I have seen a handful of authors simply write "undefined" where necessary.
$endgroup$
– Shaun
Dec 23 '18 at 3:34




$begingroup$
I have seen a handful of authors simply write "undefined" where necessary.
$endgroup$
– Shaun
Dec 23 '18 at 3:34




1




1




$begingroup$
@Shaun Thank you for pointing out about wheel theory. I believe the staff at the Web site meant that in within the real/complex number field, dividing any non-$0$ value by $0$ is usually considered to be undefined, while $0$ divided by $0$ is often called indeterminate. However, in addition to wheel theory, there may be other math systems where division by $0$ is defined and consistent with those particular set of axioms and conditions. The important thing with terms and definitions is that it's explicitly specified, or at least quite clear, what they're referring to.
$endgroup$
– John Omielan
Dec 23 '18 at 3:43






$begingroup$
@Shaun Thank you for pointing out about wheel theory. I believe the staff at the Web site meant that in within the real/complex number field, dividing any non-$0$ value by $0$ is usually considered to be undefined, while $0$ divided by $0$ is often called indeterminate. However, in addition to wheel theory, there may be other math systems where division by $0$ is defined and consistent with those particular set of axioms and conditions. The important thing with terms and definitions is that it's explicitly specified, or at least quite clear, what they're referring to.
$endgroup$
– John Omielan
Dec 23 '18 at 3:43






1




1




$begingroup$
See math.stackexchange.com/q/61914/265466 and en.m.wikipedia.org/wiki/Undefined_(mathematics).
$endgroup$
– amd
Dec 23 '18 at 7:26




$begingroup$
See math.stackexchange.com/q/61914/265466 and en.m.wikipedia.org/wiki/Undefined_(mathematics).
$endgroup$
– amd
Dec 23 '18 at 7:26










0






active

oldest

votes












Your Answer





StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "69"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3050025%2fwhat-is-the-symbol-for-undefined%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown

























0






active

oldest

votes








0






active

oldest

votes









active

oldest

votes






active

oldest

votes
















draft saved

draft discarded




















































Thanks for contributing an answer to Mathematics Stack Exchange!


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


Use MathJax to format equations. MathJax reference.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3050025%2fwhat-is-the-symbol-for-undefined%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







Popular posts from this blog

Bundesstraße 106

Verónica Boquete

Ida-Boy-Ed-Garten