幾何学分科会MLの皆様、


早稲田大学と学習院大共同開催の「学習院・早稲田 幾何学セミナー」
（Gakushuin-Waseda Geometry Seminar） 略称 GWGSのお知らせです．

第４回が4月15日（金）に下記のように行われます．
詳細は以下のホームページをご覧ください．
http://pc1.math.gakushuin.ac.jp/~hosono/GWGS/GWGS.html

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第4回　2016年4月15日（金）16:00-17:30

講演者： Uwe Semmelmann (University of Stuttgart) 
                 
題目:Almost complex structures on quaternionic K"ahler manifolds and 
symmetric spaces 

於：早稲田大学(理工キャンパス) 51号館18階18-12教室
　　Accsess: http://www.sci.waseda.ac.jp/access/


概要：In my talk I will explain how to prove the non-existence of almost 
complex structures on certain classes of manifolds, e.g. quaternion K
"ahler manifolds and homogeneous spaces of non vanishing Euler 
characteristic. The proof is based on the Atiyah-Singer index theorem 
and elementary calculations with characteristic classes. This is a joint 
work with Paul Gauduchon and Andrei Moroianu.

15:30--16:00 coffee/tea
16:00--16:40 Part 1 (introductory)
16:45--17:30 Part 2 (advanced)  

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幾何学といっても幅の広い分野でありますので専門にとらわれずに多くの方に参
加していただくことで活発な情報交換の場を提供できることを，世話人一同望ん
でいます．

世話人一同：
Martin Guest
本間泰史
細野忍
山田澄生

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Department of Mathematics,
Faculty of Science and Engineering,
Waseda University.
3-4-1 Ohkubo, Shinjuku, Tokyo 169-8555
JAPAN                            
                                                                  
Yasushi Homma (Professor/Doctor of Science)                           
         
    homma_yasushi at waseda.jp

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