What does it mean to say that a topology is defined by a metric?












1














I have read the following phrase. The weak topology on $X$ is defined by a translation invariant metric. What does this mean? Does this mean that the weak topology is the same as the topology that the metric induces?










share|cite|improve this question
























  • It means that the weak topology isn't the same as the topology that a metric of this type induces.
    – Lord Shark the Unknown
    Nov 22 '18 at 4:03










  • Oops. Ok thanks! Edited for clarity.
    – 伽罗瓦
    Nov 22 '18 at 4:03












  • Your interpretation is plausible, but without more context, it's hard to say whether it's correct. Where does the metric come from?
    – Hew Wolff
    Nov 22 '18 at 4:43
















1














I have read the following phrase. The weak topology on $X$ is defined by a translation invariant metric. What does this mean? Does this mean that the weak topology is the same as the topology that the metric induces?










share|cite|improve this question
























  • It means that the weak topology isn't the same as the topology that a metric of this type induces.
    – Lord Shark the Unknown
    Nov 22 '18 at 4:03










  • Oops. Ok thanks! Edited for clarity.
    – 伽罗瓦
    Nov 22 '18 at 4:03












  • Your interpretation is plausible, but without more context, it's hard to say whether it's correct. Where does the metric come from?
    – Hew Wolff
    Nov 22 '18 at 4:43














1












1








1


0





I have read the following phrase. The weak topology on $X$ is defined by a translation invariant metric. What does this mean? Does this mean that the weak topology is the same as the topology that the metric induces?










share|cite|improve this question















I have read the following phrase. The weak topology on $X$ is defined by a translation invariant metric. What does this mean? Does this mean that the weak topology is the same as the topology that the metric induces?







general-topology






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Nov 22 '18 at 4:04

























asked Nov 22 '18 at 4:02









伽罗瓦

1,083615




1,083615












  • It means that the weak topology isn't the same as the topology that a metric of this type induces.
    – Lord Shark the Unknown
    Nov 22 '18 at 4:03










  • Oops. Ok thanks! Edited for clarity.
    – 伽罗瓦
    Nov 22 '18 at 4:03












  • Your interpretation is plausible, but without more context, it's hard to say whether it's correct. Where does the metric come from?
    – Hew Wolff
    Nov 22 '18 at 4:43


















  • It means that the weak topology isn't the same as the topology that a metric of this type induces.
    – Lord Shark the Unknown
    Nov 22 '18 at 4:03










  • Oops. Ok thanks! Edited for clarity.
    – 伽罗瓦
    Nov 22 '18 at 4:03












  • Your interpretation is plausible, but without more context, it's hard to say whether it's correct. Where does the metric come from?
    – Hew Wolff
    Nov 22 '18 at 4:43
















It means that the weak topology isn't the same as the topology that a metric of this type induces.
– Lord Shark the Unknown
Nov 22 '18 at 4:03




It means that the weak topology isn't the same as the topology that a metric of this type induces.
– Lord Shark the Unknown
Nov 22 '18 at 4:03












Oops. Ok thanks! Edited for clarity.
– 伽罗瓦
Nov 22 '18 at 4:03






Oops. Ok thanks! Edited for clarity.
– 伽罗瓦
Nov 22 '18 at 4:03














Your interpretation is plausible, but without more context, it's hard to say whether it's correct. Where does the metric come from?
– Hew Wolff
Nov 22 '18 at 4:43




Your interpretation is plausible, but without more context, it's hard to say whether it's correct. Where does the metric come from?
– Hew Wolff
Nov 22 '18 at 4:43










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%2f3008726%2fwhat-does-it-mean-to-say-that-a-topology-is-defined-by-a-metric%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.





Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


Please pay close attention to the following guidance:


  • 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.


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%2f3008726%2fwhat-does-it-mean-to-say-that-a-topology-is-defined-by-a-metric%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

Biblatex bibliography style without URLs when DOI exists (in Overleaf with Zotero bibliography)

ComboBox Display Member on multiple fields

Is it possible to collect Nectar points via Trainline?