Show that C [a,b] is a Banach space











up vote
-2
down vote

favorite












Let $C [a,b]$ be a set of all real-valued functions $x(t),y(t),...$ which are functions of an independent real variable $t$ and are defined and continuous on a closed interval $[a,b]$. Show that $C [a,b]$ is a Banach space with norm given by
$||x|| = max_{t∈[a,b]}|x(t)|$.










share|cite|improve this question




















  • 1




    Can you at least verify that it is a vector space, and that the norm given actually qualifies as one? This should be straightforward verification of the definitions. If you have any confusion, please mention it above.
    – астон вілла олоф мэллбэрг
    Nov 27 at 13:00












  • Another fact you have probably already seen: the uniform limit of a sequence of continuous functions is continuous.
    – GEdgar
    Nov 27 at 13:21















up vote
-2
down vote

favorite












Let $C [a,b]$ be a set of all real-valued functions $x(t),y(t),...$ which are functions of an independent real variable $t$ and are defined and continuous on a closed interval $[a,b]$. Show that $C [a,b]$ is a Banach space with norm given by
$||x|| = max_{t∈[a,b]}|x(t)|$.










share|cite|improve this question




















  • 1




    Can you at least verify that it is a vector space, and that the norm given actually qualifies as one? This should be straightforward verification of the definitions. If you have any confusion, please mention it above.
    – астон вілла олоф мэллбэрг
    Nov 27 at 13:00












  • Another fact you have probably already seen: the uniform limit of a sequence of continuous functions is continuous.
    – GEdgar
    Nov 27 at 13:21













up vote
-2
down vote

favorite









up vote
-2
down vote

favorite











Let $C [a,b]$ be a set of all real-valued functions $x(t),y(t),...$ which are functions of an independent real variable $t$ and are defined and continuous on a closed interval $[a,b]$. Show that $C [a,b]$ is a Banach space with norm given by
$||x|| = max_{t∈[a,b]}|x(t)|$.










share|cite|improve this question















Let $C [a,b]$ be a set of all real-valued functions $x(t),y(t),...$ which are functions of an independent real variable $t$ and are defined and continuous on a closed interval $[a,b]$. Show that $C [a,b]$ is a Banach space with norm given by
$||x|| = max_{t∈[a,b]}|x(t)|$.







banach-spaces






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Nov 27 at 13:07









mathnoob

1,673322




1,673322










asked Nov 27 at 12:59









Thanks for answering

44




44








  • 1




    Can you at least verify that it is a vector space, and that the norm given actually qualifies as one? This should be straightforward verification of the definitions. If you have any confusion, please mention it above.
    – астон вілла олоф мэллбэрг
    Nov 27 at 13:00












  • Another fact you have probably already seen: the uniform limit of a sequence of continuous functions is continuous.
    – GEdgar
    Nov 27 at 13:21














  • 1




    Can you at least verify that it is a vector space, and that the norm given actually qualifies as one? This should be straightforward verification of the definitions. If you have any confusion, please mention it above.
    – астон вілла олоф мэллбэрг
    Nov 27 at 13:00












  • Another fact you have probably already seen: the uniform limit of a sequence of continuous functions is continuous.
    – GEdgar
    Nov 27 at 13:21








1




1




Can you at least verify that it is a vector space, and that the norm given actually qualifies as one? This should be straightforward verification of the definitions. If you have any confusion, please mention it above.
– астон вілла олоф мэллбэрг
Nov 27 at 13:00






Can you at least verify that it is a vector space, and that the norm given actually qualifies as one? This should be straightforward verification of the definitions. If you have any confusion, please mention it above.
– астон вілла олоф мэллбэрг
Nov 27 at 13:00














Another fact you have probably already seen: the uniform limit of a sequence of continuous functions is continuous.
– GEdgar
Nov 27 at 13:21




Another fact you have probably already seen: the uniform limit of a sequence of continuous functions is continuous.
– GEdgar
Nov 27 at 13:21















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',
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%2f3015740%2fshow-that-c-a-b-is-a-banach-space%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown






























active

oldest

votes













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%2f3015740%2fshow-that-c-a-b-is-a-banach-space%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

Different font size/position of beamer's navigation symbols template's content depending on regular/plain...

Berounka

I want to find a topological embedding $f : X rightarrow Y$ and $g: Y rightarrow X$, yet $X$ is not...