http://homepage.mac.com/hemsa/henning/index.htmlWasapienhenning@math.brown.eduCopyright 2007 Henning2007-06-29T21:19:35-04:00 hourly 1 2000-01-01T12:00+00:00 Fri, 29 Jun 2007 21:27:06 -0400henning@math.brown.edualgebraic geometry2007-06-29T21:19:35-04:00http://homepage.mac.com/hemsa/henning/page0/files/92a0e82231b3067beb30fe61798bc672-16.html#unique-entry-id-16http://homepage.mac.com/hemsa/henning/page0/files/92a0e82231b3067beb30fe61798bc672-16.html#unique-entry-id-16Coherent Sheaves on Configuration Schemes. It's about extending the usual notion the
bounded derived category of coherent sheaves on a scheme to a configuration scheme, which is a collection of schemes, some of which have morphisms between them. The case mostly considered in the paper is when the morphisms are closed embedding but you can also replace them by affine morphisms. I'll try to post more when I read more from the paper, and more importantly, understand more from the paper!]]>henning@math.brown.eduMath2007-06-29T21:17:42-04:00http://homepage.mac.com/hemsa/henning/page0/files/7b79778ad90086822709fdc1a1f54019-15.html#unique-entry-id-15http://homepage.mac.com/hemsa/henning/page0/files/7b79778ad90086822709fdc1a1f54019-15.html#unique-entry-id-15013. i should be able to move them over the weekend.]]>henning@math.brown.eduMath2007-05-29T21:26:48-04:00http://homepage.mac.com/hemsa/henning/page0/files/8360db0d39d81b44f99f59cbfa512650-13.html#unique-entry-id-13http://homepage.mac.com/hemsa/henning/page0/files/8360db0d39d81b44f99f59cbfa512650-13.html#unique-entry-id-13preprint on the arxiv, which he claims proves the Riemann Hypothesis FALSE! The paper is yet to be published and it will be interesting to see if this is a correct proof. There is a long list of purported proofs...]]>henning@math.brown.eduMath2007-05-29T21:22:05-04:00http://homepage.mac.com/hemsa/henning/page0/files/87c02d73380e68cdccc13fd38e07cd4f-12.html#unique-entry-id-12http://homepage.mac.com/hemsa/henning/page0/files/87c02d73380e68cdccc13fd38e07cd4f-12.html#unique-entry-id-12Wolfram have posted a problem with a $25,000 prize tag! It looks simple enough: Prove that the Turing machine below is universal.

But when you get in to the technical details, it gets a bit hairy! I don't think I'll even try!]]>henning@math.brown.eduClimbing2007-01-27T17:50:18-05:00http://homepage.mac.com/hemsa/henning/page0/files/259188360c73843d26f34c6e87486306-11.html#unique-entry-id-11http://homepage.mac.com/hemsa/henning/page0/files/259188360c73843d26f34c6e87486306-11.html#unique-entry-id-11Carabiner's rock gym. And I sucked. Big time. Hope I can redeem myself in the next comp... But the rock gym is pretty cool. It's huge, with endless rope routes and a pretty descent bouldering area.]]>henning@math.brown.eduClimbing2006-10-13T13:57:43-04:00http://homepage.mac.com/hemsa/henning/page0/files/37d86042334fcfd697138789e6f4734b-10.html#unique-entry-id-10http://homepage.mac.com/hemsa/henning/page0/files/37d86042334fcfd697138789e6f4734b-10.html#unique-entry-id-10Rhode Island Rock Gym with my brother-in-law, Hjalti. We were unsuccessful because of many factors:

1) The onramp onto I-95 was closed. We followed a detour that took us in a huge circle. That was lame.
2) We finally found a way onto the highway but then missed the exit and had to backtrack. That was pretty lame.
3) When we finally got to the rock gym we were unable to climb because Hjalti is 17 and you have to be 18 to be able to climb without a parent. That was SUPER lame. I mean, what the hell, OMG, OMG!]]>henning@math.brown.edublog2006-08-28T23:04:54-04:00http://homepage.mac.com/hemsa/henning/page0/files/03fc056c3bfaae6127b076aa759fc74f-9.html#unique-entry-id-9http://homepage.mac.com/hemsa/henning/page0/files/03fc056c3bfaae6127b076aa759fc74f-9.html#unique-entry-id-9
As most math enthusiasts know, Perelman probably proved the Poincaré conjecture (some time ago) but is know turning down the Fields Medal for it... along with a $1,000,000 prize from the Clay Institute. Who ever said that Russians are crazy must have been right! You can read a nice article about the whole thing in the New Yorker.]]>henning@math.brown.edublog2006-05-08T22:40:12+00:00http://homepage.mac.com/hemsa/henning/page0/files/912318e0b03fca2c0d34e341cf0546a4-8.html#unique-entry-id-8http://homepage.mac.com/hemsa/henning/page0/files/912318e0b03fca2c0d34e341cf0546a4-8.html#unique-entry-id-8night at the hospital and got back home Sunday morning. She's a big and healthy
girl, weighing 4575 gr (just over 10 lb) and measured 53 cm (just under 21"). She
slept most of the day -- so she could stay awake the whole night! She is sleeping
again now, like a little angel!

Emma is doing good and she was so awesome during labour -- I know I would
never be able to go through what she went through. She was in total control and
didn't get any anesthesia the whole time. I am so proud of her!]]>henning@math.brown.eduMath2006-05-08T22:38:20+00:00http://homepage.mac.com/hemsa/henning/page0/files/0f749ce0455b6ba08ab1fc1f4d8be647-7.html#unique-entry-id-7http://homepage.mac.com/hemsa/henning/page0/files/0f749ce0455b6ba08ab1fc1f4d8be647-7.html#unique-entry-id-7pictures from the annual Math Department Picnic, check them!]]>henning@math.brown.edublog2006-04-18T22:38:51+00:00http://homepage.mac.com/hemsa/henning/page0/files/726e7e1585d2668b210cade84ae97c91-6.html#unique-entry-id-6http://homepage.mac.com/hemsa/henning/page0/files/726e7e1585d2668b210cade84ae97c91-6.html#unique-entry-id-6henning@math.brown.eduMath2006-03-11T01:08:58-05:00http://homepage.mac.com/hemsa/henning/page0/files/8878e220e7e8e9e050add16ed1a43990-4.html#unique-entry-id-4http://homepage.mac.com/hemsa/henning/page0/files/8878e220e7e8e9e050add16ed1a43990-4.html#unique-entry-id-4henning@math.brown.eduApple2006-02-02T20:16:45-05:00http://homepage.mac.com/hemsa/henning/page0/files/51bb87743a7c67eee7558bf71d3ed83d-3.html#unique-entry-id-3http://homepage.mac.com/hemsa/henning/page0/files/51bb87743a7c67eee7558bf71d3ed83d-3.html#unique-entry-id-3XtremeMac Sportwrap to stick your iPod nano to your arm and jog around in the park. But if you want to be really cool you have to get yourself the new Type 45 Destroyer from the Royal Navy. It features a missile system that can detect and destroy a baseball-sized (approximately) object traveling at three times the speed of sound, has 14 decks, the latest in high tech weaponry...and iPod charging stations in each crew cabin. All that for only £605 million. You have to get one!]]>henning@math.brown.edublog2006-01-30T00:16:53-05:00http://homepage.mac.com/hemsa/henning/page0/files/5b36f94dbf1705aade3cbf5869addfdd-2.html#unique-entry-id-2http://homepage.mac.com/hemsa/henning/page0/files/5b36f94dbf1705aade3cbf5869addfdd-2.html#unique-entry-id-2henning@math.brown.edublog2005-10-28T11:20:00-04:00http://homepage.mac.com/hemsa/henning/page0/files/bd94d2eb53ed29e9f4121f3f88661219-0.html#unique-entry-id-0http://homepage.mac.com/hemsa/henning/page0/files/bd94d2eb53ed29e9f4121f3f88661219-0.html#unique-entry-id-0
I guess nobody is reading this non-existant blog but what the heck! I received an email from my good friend Panayotis with a link to a pretty cool mind reading site. Check it out: The Flash Mind Reader! In the future I will put interesting stuff in here for the empty set of people who read this site. Enjoy!

-Henning]]>