{"id":7815,"date":"2015-06-16T11:57:58","date_gmt":"2015-06-16T15:57:58","guid":{"rendered":"http:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7815"},"modified":"2015-06-29T10:33:11","modified_gmt":"2015-06-29T14:33:11","slug":"various-links-6","status":"publish","type":"post","link":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7815","title":{"rendered":"Various Links"},"content":{"rendered":"<p>Ordered from the more to less serious&#8230;<\/p>\n<ul>\n<li>On the geometric Langlands front, there&#8217;s video posted today of <a href=\"https:\/\/www.youtube.com\/watch?v=VUEyvU4flcI\">this talk<\/a> by Dennis Gaitsgory.  Michael Harris has already commented <a href=\"https:\/\/mathematicswithoutapologies.wordpress.com\/2015\/06\/11\/univalent-challenge-number-1\/\">here<\/a> about the local geometric Langlands conjecture in terms of 2-categories that Gaitsgory discusses.  Today&#8217;s arXiv listings have a <a href=\"http:\/\/arxiv.org\/abs\/1506.04293\">new paper on geometric Langlands by Witten<\/a>, which begins with his version of a formulation relating the categorical point of view and quantum field theory.<br \/>\nI wrote recently <a href=\"http:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7732\">here<\/a> about a talk by Jacob Lurie that alluded to an explanation of this categorical equivalence for the simplest case of G invertible complex numbers (rather than the case of G a general semi-simple Lie group that Gaitsgory and Witten are discussing).  I&#8217;m still far from being enlightened concerning that simplest case, but have learned a lot from Alexander Polishchuk&#8217;s <a href=\"http:\/\/www.cambridge.org\/us\/academic\/subjects\/mathematics\/algebra\/abelian-varieties-theta-functions-and-fourier-transform\">Abelian varieties, theta functions and the Fourier transform<\/a> which I take as treating the global versions of this equivalence.<\/li>\n<li> Witten has been busy, with yesterday&#8217;s arXiv listings including a <a href=\"http:\/\/arxiv.org\/abs\/1506.04087\">429 page paper with Gaiotto and Moore<\/a> (does anyone know of a longer hep-th paper that&#8217;s not a review article?).  There&#8217;s also a companion <a href=\"http:\/\/arxiv.org\/abs\/1506.04086\">shorter summary paper<\/a>.  The motivation here is again a categorical picture expressed in terms of quantum field theory models, but for more insight you&#8217;ll need to find someone more expert than me on this topic.<\/li>\n<li>Strings 2015 will be held in Bangalore in a couple weeks.  Talks titles are now <a href=\"https:\/\/strings2015.icts.res.in\/talkTitles.php\">available<\/a>, so you can see what the hot topics in the &#8220;string theory&#8221; community are. Of Gaiotto, Moore and Witten, only Witten will be speaking. Perhaps his talk on <a href=\"https:\/\/strings2015.icts.res.in\/speakerProfile.php?sId=70\">An Overview of Worldsheet and Brane Anomalies<\/a> will shed some light on the 429 page paper.<\/li>\n<li>On the Mochizuki\/abc front, hopes rest on a planned workshop at Oxford this December.  Fesenko has circulated a <a href=\"https:\/\/www.maths.nottingham.ac.uk\/personal\/ibf\/stiut1.pdf\">letter about the workshop<\/a>, which gives suggestions about how to approach the subject.<\/li>\n<li>Via <a href=\"https:\/\/plus.google.com\/+ChandanDalawat\/posts\">Chandan Dalawat&#8217;s Google+ page<\/a> I found out about this <a href=\"http:\/\/www.ihes.fr\/~gromov\/PDF\/autobiography-dec20-2010.pdf\">autobiographical piece by Misha Gromov<\/a>.  One thing it made clear to me is why I couldn&#8217;t get anything out of the couple times I&#8217;ve heard him lecture.<br \/>\n<blockquote><p>Being trivial is our most dreaded pitfall:  you say stupid things, not original things, outrageously wrong things &#8211; all will be forgotten when the dust settles down.  But if you pompously call a+b=c &#8220;Theorem&#8221; in your paper, you will be forever remembered as &#8220;this a+b guy&#8221;, no matter you prove bloody good theorems afterwords&#8230;<br \/>\nI was introduced to the idea on September 1st 1960 at the then Leningrad University when our analysis professor Boris Mikhailovich Makarov said to me after our first calculus class &#8211; he expressed this in somewhat metaphorical terms &#8211; that I should&#8217;ve kept my mouth shut unless I had something non-trivial to say.<br \/>\nFurther encouraged by my teachers and fellow students, I tried to follow his advice and, apparently, have succeeded &#8211; I hear nothing disrespectful about my mouth  for  the  last  10-20  years.   Strangely,  this  does  not  make  me  feel  a  lot happier.<br \/>\n&#8220;Trivial&#8221;  is  relative.   Anything  grasped  as  long  as  two  minutes  ago  seems trivial to a working mathematician.<\/p><\/blockquote>\n<p>Another thought this raises is that I&#8217;ve just spent the last 3 years of my life writing <a href=\"http:\/\/www.math.columbia.edu\/~woit\/QM\/qmbook.pdf\">something trivial<\/a>&#8230;<\/li>\n<li>I really like Jordan Ellenberg&#8217;s suggestion of <a href=\"https:\/\/quomodocumque.wordpress.com\/2015\/05\/25\/cold-topics-workshop\/\">Cold Topics Workshops<\/a>.<\/li>\n<li>Mathematics makes it into the Guardian with an article about <a href=\"http:\/\/www.theguardian.com\/science\/alexs-adventures-in-numberland\/2015\/jun\/11\/worlds-hottest-maths-teacher-pietro-boselli-interview\">mathematical modeling<\/a>.<\/li>\n<li>With the LHC inactive, some LHC physicists have had to spend their time <a href=\"http:\/\/cockplot.blogspot.com\">studying plots<\/a> (trigger warning, and NSFW).<\/li>\n<\/ul>\n<p><strong>Update<\/strong>: One more, far more serious than anything above. Sabine Hossenfelder brings up an important and rarely discussed topic <a href=\"http:\/\/backreaction.blogspot.com\/2015\/06\/the-plight-of-postdocs-academia-and.html\">here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ordered from the more to less serious&#8230; On the geometric Langlands front, there&#8217;s video posted today of this talk by Dennis Gaitsgory. Michael Harris has already commented here about the local geometric Langlands conjecture in terms of 2-categories that Gaitsgory &hellip; <a href=\"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7815\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-7815","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7815","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7815"}],"version-history":[{"count":6,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7815\/revisions"}],"predecessor-version":[{"id":7821,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7815\/revisions\/7821"}],"wp:attachment":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7815"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7815"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}