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	<title>Comments for What Is Research?</title>
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	<description>Questions about research, learning, teaching and knowledge, with partial answers</description>
	<lastBuildDate>Thu, 05 Nov 2009 14:35:04 +0000</lastBuildDate>
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		<title>Comment on Are textbooks getting too expensive? by vipulnaik</title>
		<link>http://whatisresearch.wordpress.com/2009/10/27/are-textbooks-getting-too-expensive/#comment-269</link>
		<dc:creator>vipulnaik</dc:creator>
		<pubDate>Thu, 05 Nov 2009 14:35:04 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=190#comment-269</guid>
		<description>Anirbit,

Thanks for your comment. Different people have different reading preferences, and your reading preference is probably shared by many. However, from what I&#039;ve read of most blogs, TV documentaries and online magazines, intra-article linking is a fairly common practice and is generally considered a good idea, particularly when the links are used to corroborate facts stated in the article/blog post and when they are too numerous to be put in a bibliography. Also, when attacking other people&#039;s opinions, it makes sense to link up to them.

This is really a style issue. The difference of opinion stems partly because of our different perceptions of the utility of blog posts: I think of it as both a vehicle for expressing opinion and as a place to make readers aware of the various other sources and viewpoints on the matter, and for you, it is more of the former and less of the latter.

In blog posts where I am more interested in waxing eloquent about my personal opinion (as in some of the TBC blog posts), I try to provide fewer external links.</description>
		<content:encoded><![CDATA[<p>Anirbit,</p>
<p>Thanks for your comment. Different people have different reading preferences, and your reading preference is probably shared by many. However, from what I&#8217;ve read of most blogs, TV documentaries and online magazines, intra-article linking is a fairly common practice and is generally considered a good idea, particularly when the links are used to corroborate facts stated in the article/blog post and when they are too numerous to be put in a bibliography. Also, when attacking other people&#8217;s opinions, it makes sense to link up to them.</p>
<p>This is really a style issue. The difference of opinion stems partly because of our different perceptions of the utility of blog posts: I think of it as both a vehicle for expressing opinion and as a place to make readers aware of the various other sources and viewpoints on the matter, and for you, it is more of the former and less of the latter.</p>
<p>In blog posts where I am more interested in waxing eloquent about my personal opinion (as in some of the TBC blog posts), I try to provide fewer external links.</p>
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		<title>Comment on Are textbooks getting too expensive? by Anirbit</title>
		<link>http://whatisresearch.wordpress.com/2009/10/27/are-textbooks-getting-too-expensive/#comment-268</link>
		<dc:creator>Anirbit</dc:creator>
		<pubDate>Thu, 05 Nov 2009 13:13:46 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=190#comment-268</guid>
		<description>A comment about your writing style,

It is getting too non-user-friendly. I mean the excessive web-linking that you do from your blog post is highly detrimental to smooth reading by the reader. The huge number of web-links make reading it a highly bumpy journey.

And many of the weblinks like the one that link to amazon price-lists are completely unnecessary. These are are sources that a reasonable reader can locate easily if he/she cares and most probably the reader reads with a certain amount of belief in the author.

Too much of hyper-linking make the author look very defensive and as if trying to clutch on to every possible straw floating on the web to support his/her point. You look weak when you put so much of hyperlinks.

Further this makes it hard for me to decipher in the articles as to what is your opinion and which one is other&#039;s opinion you are quoting.

Kindly try to make this distinction very clear in your article. In general when I am reading someone&#039;s blog I am more interested to know what is the author&#039;s opinion rather than what every other guy on the street seems to say.

You can probably try adopting the format of research papers of putting all references (here the web-links) at the end of the article as a list and use reference numbers inside if possible.</description>
		<content:encoded><![CDATA[<p>A comment about your writing style,</p>
<p>It is getting too non-user-friendly. I mean the excessive web-linking that you do from your blog post is highly detrimental to smooth reading by the reader. The huge number of web-links make reading it a highly bumpy journey.</p>
<p>And many of the weblinks like the one that link to amazon price-lists are completely unnecessary. These are are sources that a reasonable reader can locate easily if he/she cares and most probably the reader reads with a certain amount of belief in the author.</p>
<p>Too much of hyper-linking make the author look very defensive and as if trying to clutch on to every possible straw floating on the web to support his/her point. You look weak when you put so much of hyperlinks.</p>
<p>Further this makes it hard for me to decipher in the articles as to what is your opinion and which one is other&#8217;s opinion you are quoting.</p>
<p>Kindly try to make this distinction very clear in your article. In general when I am reading someone&#8217;s blog I am more interested to know what is the author&#8217;s opinion rather than what every other guy on the street seems to say.</p>
<p>You can probably try adopting the format of research papers of putting all references (here the web-links) at the end of the article as a list and use reference numbers inside if possible.</p>
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		<title>Comment on About &#8220;topic pages&#8221;: newspapers and others by voyance</title>
		<link>http://whatisresearch.wordpress.com/2009/07/08/about-topic-pages-newspapers-and-others/#comment-267</link>
		<dc:creator>voyance</dc:creator>
		<pubDate>Thu, 05 Nov 2009 02:46:24 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=160#comment-267</guid>
		<description>i really wanted tell you that your forum is awesome

thank you</description>
		<content:encoded><![CDATA[<p>i really wanted tell you that your forum is awesome</p>
<p>thank you</p>
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		<title>Comment on Math websites falling into disuse? by gowers</title>
		<link>http://whatisresearch.wordpress.com/2009/10/31/math-websites-falling-into-disuse/#comment-266</link>
		<dc:creator>gowers</dc:creator>
		<pubDate>Wed, 04 Nov 2009 22:29:58 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=200#comment-266</guid>
		<description>A very quick comment: I&#039;ve been too busy recently to do any work on the Tricki, and I don&#039;t think it&#039;s got to the stage where it is self-sustaining. But I haven&#039;t given up on it and do intend to get back to it when I&#039;m less busy with other projects.</description>
		<content:encoded><![CDATA[<p>A very quick comment: I&#8217;ve been too busy recently to do any work on the Tricki, and I don&#8217;t think it&#8217;s got to the stage where it is self-sustaining. But I haven&#8217;t given up on it and do intend to get back to it when I&#8217;m less busy with other projects.</p>
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		<title>Comment on Tricki goes live by Math websites falling into disuse? &#171; What Is Research?</title>
		<link>http://whatisresearch.wordpress.com/2009/04/18/tricki-goes-live/#comment-265</link>
		<dc:creator>Math websites falling into disuse? &#171; What Is Research?</dc:creator>
		<pubDate>Sat, 31 Oct 2009 15:06:41 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=145#comment-265</guid>
		<description>[...] blogged twice about Tricki, the Tricks Wiki, which went live in April 2009 (see the annoucement by Tim [...]</description>
		<content:encoded><![CDATA[<p>[...] blogged twice about Tricki, the Tricks Wiki, which went live in April 2009 (see the annoucement by Tim [...]</p>
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		<title>Comment on Polymath again by vipulnaik</title>
		<link>http://whatisresearch.wordpress.com/2009/10/26/polymath-again/#comment-263</link>
		<dc:creator>vipulnaik</dc:creator>
		<pubDate>Tue, 27 Oct 2009 23:43:07 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=186#comment-263</guid>
		<description>@Kristal: Thanks for your comment. I am aware that people can continue commenting and the comment thread can remain active forever -- however, the absence of a blog post summarizing latest achievements appears to indicate that concrete progress hasn&#039;t yet been made. It appears, though, that after I put up my blog post, a new post was put up starting Thread 5, and I&#039;ve updated my blog post to reflect that.

@Ernie: You&#039;re right -- I know that in these kind of problems, even a slight improvement over the best bound is usually considered worthwhile, so I agree with you that if such a breakthrough is achieved, that would constitute success. Even if it takes several more months to achieve the breakthrough, that would still be pretty impressive and provide strong indications that the polymath strategy may be a replicable strategy for producing original research. Unfortunately, this isn&#039;t my area of mathematical expertise, so looking at the comments, I cannot judge for myself how likely it is that the goals you state will be achieved.</description>
		<content:encoded><![CDATA[<p>@Kristal: Thanks for your comment. I am aware that people can continue commenting and the comment thread can remain active forever &#8212; however, the absence of a blog post summarizing latest achievements appears to indicate that concrete progress hasn&#8217;t yet been made. It appears, though, that after I put up my blog post, a new post was put up starting Thread 5, and I&#8217;ve updated my blog post to reflect that.</p>
<p>@Ernie: You&#8217;re right &#8212; I know that in these kind of problems, even a slight improvement over the best bound is usually considered worthwhile, so I agree with you that if such a breakthrough is achieved, that would constitute success. Even if it takes several more months to achieve the breakthrough, that would still be pretty impressive and provide strong indications that the polymath strategy may be a replicable strategy for producing original research. Unfortunately, this isn&#8217;t my area of mathematical expertise, so looking at the comments, I cannot judge for myself how likely it is that the goals you state will be achieved.</p>
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		<title>Comment on Polymath again by Ernie Croot</title>
		<link>http://whatisresearch.wordpress.com/2009/10/26/polymath-again/#comment-262</link>
		<dc:creator>Ernie Croot</dc:creator>
		<pubDate>Tue, 27 Oct 2009 22:15:23 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=186#comment-262</guid>
		<description>I would like to point out some differences between this problem (Polymath 4 -- finding primes) and the other polymath projects, especially the one on the Density Hales-Jewett problem:

1.  With DHJ (Polymath 1), there was already one proof known, and then the problem was whether one could produce a combinatorial proof as well.  Knowing that a problem already has a solution helps to guide the development of other approaches (e.g. combinatorial); and it also has the psychological effect of making one think it is doable, and therefore one is not as willing to give up so easily.

2.  With Polymath 4 we have had *much* fewer contributors.  Perhaps this is a matter of taste -- people who regularly contribute to polymath projects tend to be more focused on combinatorics and computational complexity; yet Polymath 4 is more a problem in computational number theory, which tends to use ideas of a different flavor.

3.  There doesn&#039;t seem to be as many avenues from which to attack Polymath 4 as there are other problems.  Many analytic approaches to the problem, for example, can be boiled down to certain problems about bounds on something called ``Dirichlet polynomials&#039;&#039;, and it is known to be a hard general problem to beat something called the ``square-root barrier&#039;&#039; for such approaches.  Though, I do think that we have a viable approach for doing this by computing certain generating functions in $latex F_2[x]$ (which is not what one would call an `analytic method&#039; -- it is more algebraic... it has been the subject of the last tens of posts to Polymath 4).


Also note that Polymath 4 is not over yet!  I think there is a very good chance of producing an algorithm to find primes of size $latex n$ (i.e. $latex log(n)/log(2)$ bits) in time better than $latex n^{0.499}$ (bit operations), perhaps assuming some ``reasonable&#039;&#039; conjectures in linear algebra.  While this may not seem like much, if it could be achieved, it would beat ``Odlyzko&#039;s algorithm&#039;&#039;, the current record-holder.   I would consider that a ``success&#039;&#039; for Polymath 4, and a good place for the project to stop.</description>
		<content:encoded><![CDATA[<p>I would like to point out some differences between this problem (Polymath 4 &#8212; finding primes) and the other polymath projects, especially the one on the Density Hales-Jewett problem:</p>
<p>1.  With DHJ (Polymath 1), there was already one proof known, and then the problem was whether one could produce a combinatorial proof as well.  Knowing that a problem already has a solution helps to guide the development of other approaches (e.g. combinatorial); and it also has the psychological effect of making one think it is doable, and therefore one is not as willing to give up so easily.</p>
<p>2.  With Polymath 4 we have had *much* fewer contributors.  Perhaps this is a matter of taste &#8212; people who regularly contribute to polymath projects tend to be more focused on combinatorics and computational complexity; yet Polymath 4 is more a problem in computational number theory, which tends to use ideas of a different flavor.</p>
<p>3.  There doesn&#8217;t seem to be as many avenues from which to attack Polymath 4 as there are other problems.  Many analytic approaches to the problem, for example, can be boiled down to certain problems about bounds on something called &#8220;Dirichlet polynomials&#8221;, and it is known to be a hard general problem to beat something called the &#8220;square-root barrier&#8221; for such approaches.  Though, I do think that we have a viable approach for doing this by computing certain generating functions in <img src='http://l.wordpress.com/latex.php?latex=F_2%5Bx%5D&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='F_2[x]' title='F_2[x]' class='latex' /> (which is not what one would call an `analytic method&#8217; &#8212; it is more algebraic&#8230; it has been the subject of the last tens of posts to Polymath 4).</p>
<p>Also note that Polymath 4 is not over yet!  I think there is a very good chance of producing an algorithm to find primes of size <img src='http://l.wordpress.com/latex.php?latex=n&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='n' title='n' class='latex' /> (i.e. <img src='http://l.wordpress.com/latex.php?latex=log%28n%29%2Flog%282%29&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='log(n)/log(2)' title='log(n)/log(2)' class='latex' /> bits) in time better than <img src='http://l.wordpress.com/latex.php?latex=n%5E%7B0.499%7D&#038;bg=ffffff&#038;fg=000000&#038;s=0' alt='n^{0.499}' title='n^{0.499}' class='latex' /> (bit operations), perhaps assuming some &#8220;reasonable&#8221; conjectures in linear algebra.  While this may not seem like much, if it could be achieved, it would beat &#8220;Odlyzko&#8217;s algorithm&#8221;, the current record-holder.   I would consider that a &#8220;success&#8221; for Polymath 4, and a good place for the project to stop.</p>
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		<title>Comment on Polymath again by Kristal Cantwell</title>
		<link>http://whatisresearch.wordpress.com/2009/10/26/polymath-again/#comment-261</link>
		<dc:creator>Kristal Cantwell</dc:creator>
		<pubDate>Tue, 27 Oct 2009 16:33:48 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=186#comment-261</guid>
		<description>The last post in thread four of the discussion of finding primes is on October 26th, the august 28th date is from the header of thread 4 it is the date in which the thread started there are over 60 comments after that.</description>
		<content:encoded><![CDATA[<p>The last post in thread four of the discussion of finding primes is on October 26th, the august 28th date is from the header of thread 4 it is the date in which the thread started there are over 60 comments after that.</p>
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		<title>Comment on Math overflow by Shreevatsa</title>
		<link>http://whatisresearch.wordpress.com/2009/10/26/math-overflow/#comment-260</link>
		<dc:creator>Shreevatsa</dc:creator>
		<pubDate>Tue, 27 Oct 2009 03:43:15 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=184#comment-260</guid>
		<description>Minor nit: it would be more accurate to say &quot;it uses the Stack Exchange software, which was developed for Stack Overflow and is now used for many other websites&quot; (OSTTE). (The actual story is more complicated; there were initially no plans of releasing the software, etc.) 
The software and system are indeed well-designed; users from StackOverflow can tell you how addictive it is. :-) The system encourages participation, and the &quot;related questions&quot; feature often works very well at finding answers for you before you even ask a question, but search otherwise is not so great. (On SO, I find there are also problems with old questions being deleted by moderators unexpectedly without notice, but it should be better on Math Overflow.) The other problem is that questions that drop off the front page tend to get insufficient interest, and can languish forever without answers. This is going to a bigger problem as traffic increases.

It should be interesting to see how this all plays out, for the mathematician community versus the programmer community and the &lt;a href=&quot;http://moms4mom.com/&quot; rel=&quot;nofollow&quot;&gt;parenting&lt;/a&gt; community.</description>
		<content:encoded><![CDATA[<p>Minor nit: it would be more accurate to say &#8220;it uses the Stack Exchange software, which was developed for Stack Overflow and is now used for many other websites&#8221; (OSTTE). (The actual story is more complicated; there were initially no plans of releasing the software, etc.)<br />
The software and system are indeed well-designed; users from StackOverflow can tell you how addictive it is. <img src='http://s.wordpress.com/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' />  The system encourages participation, and the &#8220;related questions&#8221; feature often works very well at finding answers for you before you even ask a question, but search otherwise is not so great. (On SO, I find there are also problems with old questions being deleted by moderators unexpectedly without notice, but it should be better on Math Overflow.) The other problem is that questions that drop off the front page tend to get insufficient interest, and can languish forever without answers. This is going to a bigger problem as traffic increases.</p>
<p>It should be interesting to see how this all plays out, for the mathematician community versus the programmer community and the <a href="http://moms4mom.com/" rel="nofollow">parenting</a> community.</p>
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		<title>Comment on Math overflow by Scott Morrison</title>
		<link>http://whatisresearch.wordpress.com/2009/10/26/math-overflow/#comment-259</link>
		<dc:creator>Scott Morrison</dc:creator>
		<pubDate>Tue, 27 Oct 2009 01:07:02 +0000</pubDate>
		<guid isPermaLink="false">http://whatisresearch.wordpress.com/?p=184#comment-259</guid>
		<description>I should point out that the review in the Secret Blogging Seminar was posted under my name, but co-written with Anton Geraschenko, who&#039;s baby it is.</description>
		<content:encoded><![CDATA[<p>I should point out that the review in the Secret Blogging Seminar was posted under my name, but co-written with Anton Geraschenko, who&#8217;s baby it is.</p>
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