<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
		>
<channel>
	<title>Comments on: 168. Yoneya on gravity from strings</title>
	<atom:link href="http://www.nonequilibrium.net/168-yoneya-gravity-strings/feed/" rel="self" type="application/rss+xml" />
	<link>http://www.nonequilibrium.net/168-yoneya-gravity-strings/#utm_source=feed&#038;utm_medium=feed&#038;utm_campaign=feed</link>
	<description>For physicts by physicists</description>
	<lastBuildDate>Tue, 31 Jan 2012 20:24:03 +0000</lastBuildDate>
	<sy:updatePeriod>hourly</sy:updatePeriod>
	<sy:updateFrequency>1</sy:updateFrequency>
	<generator>http://wordpress.org/?v=3.3.1</generator>
<xhtml:meta xmlns:xhtml="http://www.w3.org/1999/xhtml" name="robots" content="noindex" />
	<item>
		<title>By: Dmitry</title>
		<link>http://www.nonequilibrium.net/168-yoneya-gravity-strings/comment-page-1/#comment-5284</link>
		<dc:creator>Dmitry</dc:creator>
		<pubDate>Wed, 07 Jan 2009 15:42:20 +0000</pubDate>
		<guid isPermaLink="false">http://www.nonequilibrium.net/?p=940#comment-5284</guid>
		<description>Dear Lubos

I am glad that you are back :-) As you can probably imagine, I don&#039;t think that genetics significantly influences styles of different nations in science; style is much more influenced by culture and &lt;em&gt;language&lt;/em&gt; as you pointed out.

By the way, I even cited exactly same words of Feynman you that you present above in one of my papers :-)

Cheers,
Dmitry.</description>
		<content:encoded><![CDATA[<p>Dear Lubos</p>
<p>I am glad that you are back <img src='http://www.nonequilibrium.net/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' />  As you can probably imagine, I don&#8217;t think that genetics significantly influences styles of different nations in science; style is much more influenced by culture and <em>language</em> as you pointed out.</p>
<p>By the way, I even cited exactly same words of Feynman you that you present above in one of my papers <img src='http://www.nonequilibrium.net/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> </p>
<p>Cheers,<br />
Dmitry.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Dmitry</title>
		<link>http://www.nonequilibrium.net/168-yoneya-gravity-strings/comment-page-1/#comment-5283</link>
		<dc:creator>Dmitry</dc:creator>
		<pubDate>Wed, 07 Jan 2009 15:27:57 +0000</pubDate>
		<guid isPermaLink="false">http://www.nonequilibrium.net/?p=940#comment-5283</guid>
		<description>Dear TM

You don&#039;t just may, you most certainly welcome! Thanks for sharing, I did not actually know about these textbooks. Personally, my favorite one is &lt;a href=&quot;http://www.nonequilibrium.net/recommends/bigCFT&quot; rel=&quot;nofollow&quot;&gt;di Francesco, Mathieu, Senechal&lt;/a&gt; which you probably know about.

Cheers,
Dmitry.</description>
		<content:encoded><![CDATA[<p>Dear TM</p>
<p>You don&#8217;t just may, you most certainly welcome! Thanks for sharing, I did not actually know about these textbooks. Personally, my favorite one is <a href="http://www.nonequilibrium.net/recommends/bigCFT" rel="nofollow">di Francesco, Mathieu, Senechal</a> which you probably know about.</p>
<p>Cheers,<br />
Dmitry.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Lubos Motl</title>
		<link>http://www.nonequilibrium.net/168-yoneya-gravity-strings/comment-page-1/#comment-5276</link>
		<dc:creator>Lubos Motl</dc:creator>
		<pubDate>Tue, 06 Jan 2009 19:29:54 +0000</pubDate>
		<guid isPermaLink="false">http://www.nonequilibrium.net/?p=940#comment-5276</guid>
		<description>Hi Dmitry, in my counting, there have only been 1 birth plus 2 superstring revolutions, not 3: well, I surely don&#039;t count the re-emphasis of a large landscape of vacua (or even the fashionable degenerative anthropic lack of principles) to be a revolution in the conventional sense. 

More importantly, I think that with every revolution, there are more reasons to dismiss those who ignore all of them, not fewer reasons, as you suggest. Or do I misunderstand something? :-) I am not talking about those who joined the revolutionary movement - e.g. the supergravity people in the M-theory revolution. They&#039;re just not what I call &quot;relativists&quot; as classified by the &quot;culture&quot;.

Yes, the people who remain confined in the mental framework of the classical GR are 2-3 (or 3-4, because we must include a quantum field theory revolution) levels below us in the scientific evolutionary ladder! And even when the difference was close to 1 level, in the 1960s.

In 1962, Richard Feynman wrote to his wife from a relativistic conference he had to attend: &quot;I am not getting anything out of the meeting. I am learning nothing. Because there are no experiments, this field is not an active one, so few of the best men are doing work in it. The result is that there are hosts of dopes here (126) and it is not good for my blood pressure. Remind me not to come to any more gravity conferences!&quot;

It doesn&#039;t look like top HEP physicists viewed relativists as real peers back in 1962 and the current discrepancy is larger by 3-5 revolutions. ;-)

Concerning Yoneya, I think he is a very deep person (and he would surely be in the same culture as I would be if either of us decided to merge with a culture), but the solitaire approach may be a bit exhausting. Japanese physicists may prefer algebra because they are trained to read and write hundreds or thousands of those crazy letters, so adding a couple of symbols for the algebra is trivial. 

But the causal relationship may actually go in the opposite direction, namely that the Japanese brains are algebraically hard-wired which is why they developed (well, imported from the Chinese) a complicated alphabet rather than playing with nice geometric shapes of a few letters.

I agree that conformal bootstrap is an extremely algebraic portion of high-energy physics. After all, it&#039;s connected with all the non-geometric perturbative stringy compactifications etc. so it is the opposite of non-geometry pretty much by definition. On the other hand, I don&#039;t see that this bootstrap realm is fully dominated by the Japanese.

I see the Japanese at many other places that are arguably slightly more geometric. Well, the Kyoto group string field theory is still pretty algebraic because the whole concept of rewring string interactions in terms of new star-products is a kind of algebra, although the product has a lot of geometric substance beneath it. 

But there are other things that don&#039;t seem that algebraic - like the IKKT matrix model, to say a random Japanese thing - and on the other hand, there are many conventional stringy nations, especially the Jews, in non-geometric CFTs, too. That&#039;s why we talk about Gepner models, among other things. 

Moreover, Japan has always had geometry, although its focus was always a bit more oriented on numbers and analytical geometry than the synthetic geometry in Europe, see e.g. homework exercises from the 17th century Japan (geometry)

http://www.maths.liv.ac.uk/~mathsclub/Topics/Japanese/

But I am not sure whether the difference is so huge.

So I of course admit that there should be a signal distinguishing the nations&#039; capabilities but I don&#039;t see it as sharply as you do. Of course, the general inclination of a nation to do mathematical physics is indisputable and the Jews are the clear kings, but whether sub-styles of string theory are significantly depending on genetics is a somewhat open question to me.</description>
		<content:encoded><![CDATA[<p>Hi Dmitry, in my counting, there have only been 1 birth plus 2 superstring revolutions, not 3: well, I surely don&#8217;t count the re-emphasis of a large landscape of vacua (or even the fashionable degenerative anthropic lack of principles) to be a revolution in the conventional sense. </p>
<p>More importantly, I think that with every revolution, there are more reasons to dismiss those who ignore all of them, not fewer reasons, as you suggest. Or do I misunderstand something? <img src='http://www.nonequilibrium.net/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' />  I am not talking about those who joined the revolutionary movement &#8211; e.g. the supergravity people in the M-theory revolution. They&#8217;re just not what I call &#8220;relativists&#8221; as classified by the &#8220;culture&#8221;.</p>
<p>Yes, the people who remain confined in the mental framework of the classical GR are 2-3 (or 3-4, because we must include a quantum field theory revolution) levels below us in the scientific evolutionary ladder! And even when the difference was close to 1 level, in the 1960s.</p>
<p>In 1962, Richard Feynman wrote to his wife from a relativistic conference he had to attend: &#8220;I am not getting anything out of the meeting. I am learning nothing. Because there are no experiments, this field is not an active one, so few of the best men are doing work in it. The result is that there are hosts of dopes here (126) and it is not good for my blood pressure. Remind me not to come to any more gravity conferences!&#8221;</p>
<p>It doesn&#8217;t look like top HEP physicists viewed relativists as real peers back in 1962 and the current discrepancy is larger by 3-5 revolutions. <img src='http://www.nonequilibrium.net/wp-includes/images/smilies/icon_wink.gif' alt=';-)' class='wp-smiley' /> </p>
<p>Concerning Yoneya, I think he is a very deep person (and he would surely be in the same culture as I would be if either of us decided to merge with a culture), but the solitaire approach may be a bit exhausting. Japanese physicists may prefer algebra because they are trained to read and write hundreds or thousands of those crazy letters, so adding a couple of symbols for the algebra is trivial. </p>
<p>But the causal relationship may actually go in the opposite direction, namely that the Japanese brains are algebraically hard-wired which is why they developed (well, imported from the Chinese) a complicated alphabet rather than playing with nice geometric shapes of a few letters.</p>
<p>I agree that conformal bootstrap is an extremely algebraic portion of high-energy physics. After all, it&#8217;s connected with all the non-geometric perturbative stringy compactifications etc. so it is the opposite of non-geometry pretty much by definition. On the other hand, I don&#8217;t see that this bootstrap realm is fully dominated by the Japanese.</p>
<p>I see the Japanese at many other places that are arguably slightly more geometric. Well, the Kyoto group string field theory is still pretty algebraic because the whole concept of rewring string interactions in terms of new star-products is a kind of algebra, although the product has a lot of geometric substance beneath it. </p>
<p>But there are other things that don&#8217;t seem that algebraic &#8211; like the IKKT matrix model, to say a random Japanese thing &#8211; and on the other hand, there are many conventional stringy nations, especially the Jews, in non-geometric CFTs, too. That&#8217;s why we talk about Gepner models, among other things. </p>
<p>Moreover, Japan has always had geometry, although its focus was always a bit more oriented on numbers and analytical geometry than the synthetic geometry in Europe, see e.g. homework exercises from the 17th century Japan (geometry)</p>
<p><a href="http://www.maths.liv.ac.uk/~mathsclub/Topics/Japanese/" rel="nofollow">http://www.maths.liv.ac.uk/~ma...../Japanese/</a></p>
<p>But I am not sure whether the difference is so huge.</p>
<p>So I of course admit that there should be a signal distinguishing the nations&#8217; capabilities but I don&#8217;t see it as sharply as you do. Of course, the general inclination of a nation to do mathematical physics is indisputable and the Jews are the clear kings, but whether sub-styles of string theory are significantly depending on genetics is a somewhat open question to me.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: theoreticalminimum</title>
		<link>http://www.nonequilibrium.net/168-yoneya-gravity-strings/comment-page-1/#comment-5275</link>
		<dc:creator>theoreticalminimum</dc:creator>
		<pubDate>Tue, 06 Jan 2009 19:11:13 +0000</pubDate>
		<guid isPermaLink="false">http://www.nonequilibrium.net/?p=940#comment-5275</guid>
		<description>If I may:
Toshitake Kohno, if I rightly recall, has written a short book which provides a nice introduction to the geometrical aspects of CFT, and it also covers to some extent its application to topological invariants. One book which I recently came across while studying CFT (I&#039;m currently taking Blumenhagen&#039;s course in CFT in Munich) is Schottenloher&#039;s (also from Munich) &quot;A Mathematical Introduction to CFT&quot;. This is a very nice textbook that opens up the mathematical core of CFT and exposes it to anyone&#039;s liking.</description>
		<content:encoded><![CDATA[<p>If I may:<br />
Toshitake Kohno, if I rightly recall, has written a short book which provides a nice introduction to the geometrical aspects of CFT, and it also covers to some extent its application to topological invariants. One book which I recently came across while studying CFT (I&#8217;m currently taking Blumenhagen&#8217;s course in CFT in Munich) is Schottenloher&#8217;s (also from Munich) &#8220;A Mathematical Introduction to CFT&#8221;. This is a very nice textbook that opens up the mathematical core of CFT and exposes it to anyone&#8217;s liking.</p>
]]></content:encoded>
	</item>
</channel>
</rss>

