How to prove that the center of the fundamental group of $T_g$ is trivial for $g geq 2$?












10












$begingroup$


Where $T_g$ is a closed orientable surface of genus g.
I want a proof using covering space theory. I know a proof that uses the notion of hyperbolic groups and Riemanian geometry using uniformization theorem. But I want to know is it possible to prove it just using covering space theory?










share|cite|improve this question











$endgroup$












  • $begingroup$
    There are purely algebraic proofs of this fact, but you need some background in combinatorial group theory, e.g. in Lyndon-Schupp.
    $endgroup$
    – Moishe Cohen
    Mar 3 '17 at 18:06










  • $begingroup$
    @daw edited....
    $endgroup$
    – Infinity
    Dec 24 '18 at 22:55










  • $begingroup$
    Why do you want that? Fundamental groups themselves are generally nontrivial to compute.
    $endgroup$
    – anomaly
    Dec 24 '18 at 23:35










  • $begingroup$
    @anomaly I don't care about proofs from covering space theory, but a non-hyperbolic proof as in Moishe's first comment would be nice.
    $endgroup$
    – Mike Miller
    Dec 27 '18 at 15:17
















10












$begingroup$


Where $T_g$ is a closed orientable surface of genus g.
I want a proof using covering space theory. I know a proof that uses the notion of hyperbolic groups and Riemanian geometry using uniformization theorem. But I want to know is it possible to prove it just using covering space theory?










share|cite|improve this question











$endgroup$












  • $begingroup$
    There are purely algebraic proofs of this fact, but you need some background in combinatorial group theory, e.g. in Lyndon-Schupp.
    $endgroup$
    – Moishe Cohen
    Mar 3 '17 at 18:06










  • $begingroup$
    @daw edited....
    $endgroup$
    – Infinity
    Dec 24 '18 at 22:55










  • $begingroup$
    Why do you want that? Fundamental groups themselves are generally nontrivial to compute.
    $endgroup$
    – anomaly
    Dec 24 '18 at 23:35










  • $begingroup$
    @anomaly I don't care about proofs from covering space theory, but a non-hyperbolic proof as in Moishe's first comment would be nice.
    $endgroup$
    – Mike Miller
    Dec 27 '18 at 15:17














10












10








10


3



$begingroup$


Where $T_g$ is a closed orientable surface of genus g.
I want a proof using covering space theory. I know a proof that uses the notion of hyperbolic groups and Riemanian geometry using uniformization theorem. But I want to know is it possible to prove it just using covering space theory?










share|cite|improve this question











$endgroup$




Where $T_g$ is a closed orientable surface of genus g.
I want a proof using covering space theory. I know a proof that uses the notion of hyperbolic groups and Riemanian geometry using uniformization theorem. But I want to know is it possible to prove it just using covering space theory?







algebraic-topology manifolds homotopy-theory covering-spaces






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Dec 24 '18 at 22:54







Infinity

















asked Mar 3 '17 at 17:58









InfinityInfinity

321112




321112












  • $begingroup$
    There are purely algebraic proofs of this fact, but you need some background in combinatorial group theory, e.g. in Lyndon-Schupp.
    $endgroup$
    – Moishe Cohen
    Mar 3 '17 at 18:06










  • $begingroup$
    @daw edited....
    $endgroup$
    – Infinity
    Dec 24 '18 at 22:55










  • $begingroup$
    Why do you want that? Fundamental groups themselves are generally nontrivial to compute.
    $endgroup$
    – anomaly
    Dec 24 '18 at 23:35










  • $begingroup$
    @anomaly I don't care about proofs from covering space theory, but a non-hyperbolic proof as in Moishe's first comment would be nice.
    $endgroup$
    – Mike Miller
    Dec 27 '18 at 15:17


















  • $begingroup$
    There are purely algebraic proofs of this fact, but you need some background in combinatorial group theory, e.g. in Lyndon-Schupp.
    $endgroup$
    – Moishe Cohen
    Mar 3 '17 at 18:06










  • $begingroup$
    @daw edited....
    $endgroup$
    – Infinity
    Dec 24 '18 at 22:55










  • $begingroup$
    Why do you want that? Fundamental groups themselves are generally nontrivial to compute.
    $endgroup$
    – anomaly
    Dec 24 '18 at 23:35










  • $begingroup$
    @anomaly I don't care about proofs from covering space theory, but a non-hyperbolic proof as in Moishe's first comment would be nice.
    $endgroup$
    – Mike Miller
    Dec 27 '18 at 15:17
















$begingroup$
There are purely algebraic proofs of this fact, but you need some background in combinatorial group theory, e.g. in Lyndon-Schupp.
$endgroup$
– Moishe Cohen
Mar 3 '17 at 18:06




$begingroup$
There are purely algebraic proofs of this fact, but you need some background in combinatorial group theory, e.g. in Lyndon-Schupp.
$endgroup$
– Moishe Cohen
Mar 3 '17 at 18:06












$begingroup$
@daw edited....
$endgroup$
– Infinity
Dec 24 '18 at 22:55




$begingroup$
@daw edited....
$endgroup$
– Infinity
Dec 24 '18 at 22:55












$begingroup$
Why do you want that? Fundamental groups themselves are generally nontrivial to compute.
$endgroup$
– anomaly
Dec 24 '18 at 23:35




$begingroup$
Why do you want that? Fundamental groups themselves are generally nontrivial to compute.
$endgroup$
– anomaly
Dec 24 '18 at 23:35












$begingroup$
@anomaly I don't care about proofs from covering space theory, but a non-hyperbolic proof as in Moishe's first comment would be nice.
$endgroup$
– Mike Miller
Dec 27 '18 at 15:17




$begingroup$
@anomaly I don't care about proofs from covering space theory, but a non-hyperbolic proof as in Moishe's first comment would be nice.
$endgroup$
– Mike Miller
Dec 27 '18 at 15:17










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%2f2170520%2fhow-to-prove-that-the-center-of-the-fundamental-group-of-t-g-is-trivial-for-g%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%2f2170520%2fhow-to-prove-that-the-center-of-the-fundamental-group-of-t-g-is-trivial-for-g%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

Ellipse (mathématiques)

Quarter-circle Tiles

Mont Emei